Calculate due date based on period

Pregnancy Due Date Calculator - American Pregnancy Association

This is based on the cycle length provided, not an average cycle length of 28 days, however it is still an estimate.

Week 1 & 2

Weeks 1 & 2 of your pregnancy is Jan 02, 2022 - Jan 15, 2022

Baby Conceived

It's ovulation time. If sperm and egg meet, you're on your way to pregnancy.

Read our full post on weeks 1 & 2 of pregnancy >

Week 3

Week 3 of your pregnancy is Jan 16, 2022 - Jan 22, 2022

Implantation occurs

Your baby is a tiny ball of several hundred cells that are rapidly multiplying and burrowing into the lining of your uterus. The cells that become the placenta are producing hCG, the pregnancy hormone. It tells your ovaries to stop releasing eggs and keep producing progesterone. Once there's enough hCG in your urine, you'll get a positive pregnancy test result.

Read our full post on week 3 of pregnancy >

Week 4

Week 4 of your pregnancy is Jan 23, 2022 - Jan 29, 2022

Positive Pregnancy Test

Your baby is an embryo made up of two layers, the hypoblast and the epiblast. The primative placenta is developing and preparing to provide nutrients and oxygen to your growing baby. The amniotic sac is developing and will surround and protect your baby while it continues to grow.

Read our full post on week 4 of pregnancy >

Week 5

Week 5 of your pregnancy is Jan 30, 2022 - Feb 05, 2022

Your embryo is now made up of three layers, the ectoderm, the mesoderm and the endoderm which will later form all the organs and tissues. You might start to feel the first twinges of pregnancy such as tender breasts, frequent urination, or morning sickness

Read our full post on week 5 of pregnancy >

Week 6

Week 6 of your pregnancy is Feb 06, 2022 - Feb 12, 2022

Heartbeat detectable by ultrasound

Your baby's heart is beating about 160 times a minute and the nose, mouth and ears are taking shape. Lungs and digestive system are forming organs.

Read our full post on week 6 of pregnancy >

Week 7

Week 7 of your pregnancy is Feb 13, 2022 - Feb 19, 2022

Your baby is forming hands and feet. Key organs like the stomach, liver and esophagus are beginning to form. Your uterus has doubled in size. The umbilical cord is transferring blood and waste between baby and mother.

Read our full post on week 7 of pregnancy >

Week 8

Week 8 of your pregnancy is Feb 20, 2022 - Feb 26, 2022

The respiratory system is forming now. Breathing tubes extend from the throat to the branches of the developing lungs.

Read our full post on week 8 of pregnancy >

Week 9

Week 9 of your pregnancy is Feb 27, 2022 - Mar 05, 2022

Your baby is nearly an inch long now. If you watch closely, you may see your baby move if you have an ultrasound done

Read our full post on week 9 of pregnancy >

Week 10

Week 10 of your pregnancy is Mar 06, 2022 - Mar 12, 2022

Your baby's organs are growing and beginning to mature. The baby's head comprises half the length of the body.

Read our full post on week 10 of pregnancy >

Week 11

Week 11 of your pregnancy is Mar 13, 2022 - Mar 19, 2022

Fingers and toes have separated and the bones are beginning to harden. External genitalia has almost completely formed.

Read our full post on week 11 of pregnancy >

Week 12

Week 12 of your pregnancy is Mar 20, 2022 - Mar 26, 2022

The kidneys can now secrete urine and the nervous system is maturing. You baby may be curling all 10 toes, practicing opening and closing fingers and sucking a thumb. And mom should have gained from 2-5 lbs.

Read our full post on week 12 of pregnancy >

Week 13

Week 13 of your pregnancy is Mar 27, 2022 - Apr 02, 2022

Miscarrige risk decreases

Your baby now has unique fingerprints and the kidney and urinary tract are completely functional, that means she's peeing. And if you are having a girl, her ovaries are already full of thousands of eggs.

Read our full post on week 13 of pregnancy >

Week 14

Week 14 of your pregnancy is Apr 03, 2022 - Apr 09, 2022

Your baby's facial muscles are getting a workout as he squints, frowns, grimaces and practices his first smile for you.

Read our full post on week 14 of pregnancy >

Week 15

Week 15 of your pregnancy is Apr 10, 2022 - Apr 16, 2022

Your baby is looking more like a baby with legs growing longer than the arms and all her limbs moving. The ears are properly positioned on the side of her head and the eyes are moving from the side of the head to the front of the face.At your doctor's visit, he should offer you a quad screening test to check for Down's syndrome or other chromosomal abnormalities.

Read our full post on week 15 of pregnancy >

Week 16

Week 16 of your pregnancy is Apr 17, 2022 - Apr 23, 2022

Baby's heart is pumping about 25 quarts of blood each day. His eyes are working and moving side to side even though the eyelids are still sealed. Mom will have a "pregnancy glow" due to increased blood supply.

Read our full post on week 16 of pregnancy >

Week 17

Week 17 of your pregnancy is Apr 24, 2022 - Apr 30, 2022

Baby's skeleton is changing from soft cartilage to bone and her heart is now regulated by her brain. She's practicing her sucking and swallowing skills in preparation for that first suckle at your breast or the bottle. Mom's breasts may have increased a full bra size.

Read our full post on week 17 of pregnancy >

Week 18

Week 18 of your pregnancy is May 01, 2022 - May 07, 2022

Gender reveal time

If you're having a girl, her uterus and fallopian tubes are formed and in place. If you're having a boy, his genitals are noticable now but he may hide them during an ultrasound. Are you feeling kickes and punches? Baby's hearing is also developing, so you may want to start talking to your baby.

Read our full post on week 18 of pregnancy >

Week 19

Week 19 of your pregnancy is May 08, 2022 - May 14, 2022

Baby's brain is designating specialized areas for his 5 senses - vision, hearing, taste, smell and touch. A waxy protective coating called the vernix caseosa is forming on his skin to prevent wrinkling.

Read our full post on week 19 of pregnancy >

Week 20

Week 20 of your pregnancy is May 15, 2022 - May 21, 2022

Your baby weighs about 10 ounces and is the size of a small banana. Her uterus is fully formed this week and she may have tiny primitive eggs in tiny ovaries now. His testicles are waiting for the scrotum to finish growing and will begin their descent soon. Mom can expect to gain about 1/2 lb per week for the rest of her pregnancy.

Read our full post on week 20 of pregnancy >

Week 21

Week 21 of your pregnancy is May 22, 2022 - May 28, 2022

Feel all that moving and shaking going on! Baby's arms and legs are in proportion now and movements are much more coordinated. Bone marrow is now helping the liver and spleen produce blood cells. The intestines are starting to produce meconium, the thick tarry looking stool first seen in baby's diaper.

Read our full post on week 21 of pregnancy >

Week 22

Week 22 of your pregnancy is May 29, 2022 - Jun 04, 2022

Senses are growing stronger. Now she can hear your heart beat, your breathing and digestion. Sense of sight is becoming more fine-tuned and he can preceive light and dark. Hormones are now developing which will the organs the commands they need to operate.

Read our full post on week 22 of pregnancy >

Week 23

Week 23 of your pregnancy is Jun 05, 2022 - Jun 11, 2022

Premature baby may survive

Baby's organs and bones are visible through his skin, which has a red hue because of the developing veins and arteries beneath. He'll become less transparent as his fat deposits fill in. Baby is also developing surfactant which will help the lungs inflate if baby is born prematurely

Read our full post on week 23 of pregnancy >

Week 24

Week 24 of your pregnancy is Jun 12, 2022 - Jun 18, 2022

Baby's face is almost fully formed complete with eyelashes, eyebrows and hair. Right now her hair is white because there's no pigment yet. Between now and 28 weeks, the doctor should send mom for a glucose screening test for gestational diabetes.

Read our full post on week 24 of pregnancy >

Week 25

Week 25 of your pregnancy is Jun 19, 2022 - Jun 25, 2022

Baby is gaining more fat and looking more like a newborn. Hair color and texture is in place. His lungs are maturing and preparing for that first breath. You might feel the baby having hiccups.

Read our full post on week 25 of pregnancy >

Week 26

Week 26 of your pregnancy is Jun 26, 2022 - Jul 02, 2022

Brain-wave activity is on high That means baby can hear noises and respond to them with an increase pulse rate or movement. Eyes are beginning to open but they don't have much pigmentation. That will develop over the next couple months and may even continue to change until she's about 6-months-old.

Read our full post on week 26 of pregnancy >

Week 27

Week 27 of your pregnancy is Jul 03, 2022 - Jul 09, 2022

Start talking to your baby

Baby may recognize both your and your partner's voices. This is the time to read and even sing to your baby. She now has taste buds so when you eat spicy food, your baby will be able to taste the difference in the amniotic fluid. Her mealtime comes about two hours after yours. Feel some belly spasms? Those are likely hiccups from that spicy food. It doesn't bother the baby as much as you. Baby also has settled in to a regular sleep cycle, but it may be different from mom's.

Read our full post on week 27 of pregnancy >

Week 28

Week 28 of your pregnancy is Jul 10, 2022 - Jul 16, 2022

During the third trimester the brain triples in weight adding billions of new nerve cells. Senses of hearing, smell and touch are developed and functional. Your baby is having different sleep cycles, including rapid eye movement. That means she's dreaming.

Read our full post on week 28 of pregnancy >

Week 29

Week 29 of your pregnancy is Jul 17, 2022 - Jul 23, 2022

Baby can breathe

Baby's bones are soaking up lots of calcium as they harden so be sure to consume good sources of calcium. We recommend taking Nordic Naturals and Fairhaven Health supplements.

Read our full post on week 29 of pregnancy >

Week 30

Week 30 of your pregnancy is Jul 24, 2022 - Jul 30, 2022

Baby's brain is taking on characteristic grooves and indentations to allow for an increased amount of brain tissue. Bone marrow has taken over the production of red blood cells. This means she'll be better able to thrive on her own when she's born Baby is now weighing about 3 lbs and is 11 inches.

Read our full post on week 30 of pregnancy >

Week 31

Week 31 of your pregnancy is Jul 31, 2022 - Aug 06, 2022

Baby's brain is developing faster than ever and he's processing information, tracking light and perceiving signals from all five sense. She's probably moving a lot, especially at night when you're trying to sleep. Take comfort that all this activity means your baby is healthy. Mom may start feeling some Braxton Hicks contractions.

Read our full post on week 31 of pregnancy >

Week 32

Week 32 of your pregnancy is Aug 07, 2022 - Aug 13, 2022

Baby can focus on large objects not too far away; toenails and fingernails have grown in along with real hair. He's practicing swallowing, breathing, kicking and sucking. All key skills for thriving after birth.

Read our full post on week 32 of pregnancy >

Week 33

Week 33 of your pregnancy is Aug 14, 2022 - Aug 20, 2022

Immune system is maturing

The bones in your baby's skull are still pliable which makes it easier for her to fit through the birth canal. Your uterine walls are becoming thinner allowing more light to penetrate your womb. That helps baby differentiate between night and day.

Read our full post on week 33 of pregnancy >

Week 34

Week 34 of your pregnancy is Aug 21, 2022 - Aug 27, 2022

Baby's fat layers are filling her out and will help regulate body temperture when she's born. If your baby is a boy, the testicles are making their way down from the abdomen to the scrotum.

Read our full post on week 34 of pregnancy >

Week 35

Week 35 of your pregnancy is Aug 28, 2022 - Sep 03, 2022

Kidneys are fully developed and her liver can process some waste products. Most of her physical development is complete. She'll spend the next few weeks gaining weight and adding baby fat. Baby is settling lower into the pelvis preparing for delivery and this is called "lightening".

Read our full post on week 35 of pregnancy >

Week 36

Week 36 of your pregnancy is Sep 04, 2022 - Sep 10, 2022

Hopefully your baby is in a head-down position. If not, your practitioner may suggest an external cephalic version to manipulate your baby into a head down position. The vernix caseosa has now disappeared.

Read our full post on week 36 of pregnancy >

Week 37

Week 37 of your pregnancy is Sep 11, 2022 - Sep 17, 2022

Baby is considered full term

Baby is taking up most of the room in your womb so he's only kicking and poking you, no more somersaults. Baby is sucking her thumb, blinking eyes and inhaling and exhaling amniotic fluid.

Read our full post on week 37 of pregnancy >

Week 38

Week 38 of your pregnancy is Sep 18, 2022 - Sep 24, 2022

Baby's eyes right now are blue, gray or brown but once they're exposed to light they may change color or a shade. The lanugo, the fine downy hair that covered his body for warmth is falling off in preparation for delivery. Her lungs have strenthened and her vocal cords have developed. That means she's ready for her first cry.

Read our full post on week 38 of pregnancy >

Week 39

Week 39 of your pregnancy is Sep 25, 2022 - Oct 01, 2022

Baby is ready to make his debut. He's adding more fat as his pinkish skin turns white or white-grayish. He won't have his final pigment until shortly after birth.

Read our full post on week 39 of pregnancy >

Week 40

Week 40 of your pregnancy is Oct 02, 2022 - Oct 08, 2022

This is the official end of your pregnancy but because due dates are just a calculation he might be "late." No need to worry, your body knows the right time to go into labor, or your doctor may suggest you be induced. At birth your baby's eye sight is a little blurry since central vision is still developing. Just say hello and he'll recognize your voice.

Read our full post on week 40 of pregnancy >

Calculate your due date: How to find your baby's due date

Choose a calculation method Last periodConception dateI know my due date

First day of my last period

BabyCenter's Due Date Calculator

Use our pregnancy due date calculator by plugging in either the date of your last menstrual cycle or the date you know you conceived. The calculator will do the rest.

How is my due date calculated?

There are several ways your due date is determined. If you happen to know the day you conceived, you can count 38 weeks from that day to find your due date. (Human gestation takes about 38 weeks.)

But very few expectant moms know exactly when they conceived. Even if you only had sex once during your fertile period, you wouldn't conceive on that day unless you happen to be ovulating. Sperm can live for up to five days inside your fallopian tubes. So, it could be up to five days after you have sex that you release an egg (ovulate) and it gets fertilized by a waiting sperm. That's the day you conceive.

So, without knowing the day of conception, how does anyone determine a due date?

First day of your last period

The most common way to calculate your pregnancy due date is by counting 40 weeks from the first day of your last menstrual period (LMP). And that's how most healthcare providers do it.

If your menstrual cycle length is the average length (28-day cycle), your menstrual cycle probably started about two weeks before you conceived. This explains why pregnancies are said to last 40 weeks instead of 38 weeks.

This method doesn't take into account how long your menstrual cycle actually is or when you think you might have conceived. But generally speaking, women typically ovulate about two weeks after their menstrual cycle starts. And women are more likely to know when their last period started than the day they ovulated.

Conception date

If you do happen to know precisely when you conceived – say, if you were using an ovulation predictor kit or tracking your ovulation symptoms – you can calculate your pregnancy due date based on your conception date. Just choose that calculation method from the pulldown above and put in your date.

Note: Again, you don't necessarily conceive on the day you have sex.

IVF transfer date

If you conceived through IVF, you can calculate your due date using your IVF transfer date. If you had a Day 5 embryo transfer, count 261 days from your transfer date. If you had a Day 3 embryo transfer, count 263 days.

Can my due date change?

Your healthcare provider might revise your due date if your baby is measured during a first trimester ultrasound scan and found to be much bigger or smaller than expected for gestational age. This is more likely to happen if you have an irregular menstrual cycle length that makes it hard to pinpoint the date of conception.

Your healthcare provider will measure your baby during that ultrasound exam to figure out how far along your baby is and then provide you with a new due date.

What if I already know my due date?

If you already know your due date, you can use this calculator to see your pregnancy timeline. It will tell you when you'll hit various milestones, and when you may be due for prenatal tests and prenatal visits. You'll also find what your baby's sign and birthstone will probably be and which famous people were born on your due date.

How likely am I to give birth on my due date?

Of course, a due date calculation is always approximate, whether it's from our tool or from your doctor or midwife. Only 1 in 20 women delivers on their due date. You're just as likely to go into labor any day during the two weeks before or after.

Want more information about how the weeks, months, and trimesters of pregnancy are counted? See our pregnancy timing chart.

How soon can I take a pregnancy test?

With all this talk about pregnancy due dates, you may be wondering when you can take a pregnancy test. To ensure you get the most accurate reading, it's best to wait a few days after your missed period to take a pregnancy test.

At-home urine tests measure the amount of hCG (human Chorionic Gonadotropin) present in your body. If you take a pregnancy test before you miss your period, you may not get an accurate result, despite what some tests advertise.

If you're getting a blood test in your provider's office, you may get results sooner. These tests also measure the amount of hCG in your bloodstream, but they're more sensitive than at-home urine tests. Blood tests may be able to detect pregnancy six to eight days after ovulation.

Read more

• Your pregnancy, week by week
• Your first trimester pregnancy checklist
• Pregnancy Weight Gain Calculator
• Ovulation Calculator
• See all tools

Using Excel formulas to determine payments and savings

Managing your personal finances can be challenging, especially if you need to plan your payments and savings. Excel formulas and budget templates help you calculate the future value of your debt and investments, making it easy to calculate the time it takes to reach your goals. Use the following functions:

• PMT : Returns the periodic payment amount for an annuity based on constant payment amounts and interest rate.

• NPER : Returns the number of payment periods for an investment based on regular, constant payments and a constant interest rate.

• PV : Returns the present (to date) value of the investment. Present (present) value is the total amount currently equal to a number of future payments.

• BS : Returns the future value of an investment subject to periodic equal payments and a constant interest rate.

Calculation of monthly payments to pay off credit card debt

Assume the balance payable is $5,400 at 17% per annum. Until the debt is fully repaid, you will not be able to pay by card for purchases.

Using the function PMT(rate;NPER;PV)

=PMT(17%/12;2*12;5400)

we receive a monthly payment of $266.99, which will allow us to pay off the debt in two years.

• The rate argument is the interest rate for the loan repayment period. For example, in this formula, the rate of 17% per annum is divided by 12 - the number of months in a year.

• The NPER argument 2*12 is the total number of loan payment periods.

• The PV or present value argument is $5,400.

Calculating monthly mortgage payments

Imagine a $180,000 house at 5% interest for 30 years.

Using the function PMT(rate;NPER;PV)

=PMT(5%/12;30*12;180000)

received a monthly payment (excluding insurance and taxes) of $966.28.

• The rate argument is 5% divided by 12 months of the year.

• The NPER argument is 30*12 for a 30-year mortgage loan with 12 monthly payments payable within a year.

• The PV argument is 180,000 (the current value of the loan).

Calculation of the amount of monthly savings required for vacation

You need to raise money for a holiday worth $8,500 over three years. The savings rate is 1.5%.

Using the function PMT(rate;NPER;PS;BS)

=PMT(1.5%/12;3*12;0;8500)

we get that in order to collect 8500 US dollars in three years, it is necessary to save 230.99 US dollars monthly.

• The rate argument is 1.5% divided by 12 months, the number of months in a year.

• The NPER argument is 3*12 for twelve monthly payments over three years.

• PV (Present Value) is 0 because it starts from zero.

• The FV argument (future value) to be reached is $8,500.

Now, let's say you want to raise $8,500 for vacations over three years, and you're wondering how much you need to put into your account to make your monthly contribution $175.00. The PS function will calculate the size of the initial deposit, which will allow you to collect the desired amount.

Via the PV(Rate;NPER;PMT;BS) function

\u003d PS (1.5% / 12; 3 * 12; -175; 8500)

we learn that an initial deposit of $1,969.62 is required to be able to save $175.00 per month and raise $8,500 over three years.

• The rate argument is 1.5%/12.

• The NPER argument is 3*12 (or twelve monthly payments over three years).

• The PMT argument is -175 (to save $175 per month).

• FV argument (future value) is 8500.

Calculation of consumer loan maturity

Imagine you have taken out a $2,500 consumer loan and agreed to pay $150 monthly at 3% interest.

Using the NPER(rate;PMT;PV) function

=NPER(3%/12;-150;2500)

we find out that it takes 17 months and several days to repay the loan.

• The rate argument is 3%/12 monthly payments per year.

• The PMT argument is -150.

• The PV argument (present value) is 2500.

Calculation of the amount of the first installment

Say you want to buy a car worth $19,000 at 2.9% per annum for three years. You want your monthly payments to be around $3,500 per month, so you need to figure out how much your contribution is. In this formula, the result of the PV function is the loan amount, which is then subtracted from the purchase price to get the down payment.

Via function PV(rate;NPER;PLT)

\u003d 19000-PS (2. 9% / 12; 3 * 12; -350)

we find out that the first installment should be 69$46.48.

• The formula first enters a purchase price of $19,000. The result of the PS function will be subtracted from the purchase price.

• The rate argument is 2.9% divided by 12.

• The NPER argument is 3*12 (or twelve monthly payments over three years).

• The PMT argument is -350 (you will need to pay $350 per month).

Assessment of the dynamics of savings increase

Starting with $500 in the account, how much can you collect in 10 months if you deposit $200 per month at 1. 5% per annum?

Using the function BS(rate; NPER; PMT; PS)

=BS(1.5%/12;10;-200;-500)

we get that in 10 months the amount of 2517.57 US dollars will be released.

• The rate argument is 1.5%/12.

• The NPER argument is 10 (months).

• The PMT argument is -200.

• The PV (Present Value) argument is -500.

PMT

NPER

PS

BS

PMT function - Microsoft Support

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PMT is one of the financial functions that returns the periodic payment amount for an annuity based on constant payment amounts and a constant interest rate.

Use the Excel Formula Coach tool to calculate your monthly loan payments. In doing so, you will learn how to use the PMT function in a formula.

Syntax

PMT(rate; nper; ps; [bs]; [type])

Note: For a more detailed description of the PMT function arguments, see the description of the PS function.

The PMT function arguments are described below.

• Rate Required argument. Loan interest rate.

• Nper Required argument. The total number of loan payments.

• Ps Mandatory argument. The present value or total amount that is currently equal to a series of future payments, also called the principal amount.

• Bs Optional. The value of the future value, that is, the desired balance of funds after the last payment. If the argument "fc" is omitted, a value of 0 is assumed (for example, the future value for a loan is 0).

• Type Optional argument. The number 0 (zero) or 1 indicating when the payout is due.

Remarks

• Payments returned by the PMT function include principal and interest payments, but do not include taxes, reserve payments, or fees sometimes associated with a loan.

• Make sure you are consistent in your choice of units of measure for the "rate" and "nper" arguments. If you are making monthly payments on a four-year loan at 12 percent per annum, use 12%/12 for the rate argument and 4*12 for the nper argument. If you are making annual payments on the same loan, then use 12 percent for the "rate" argument and 4 for the "nper" argument.

Tip To find the total amount paid out during the payment interval, multiply the value returned by the PMT function by "nper".

Example

Copy the sample data from the following table and paste it into cell A1 of a new Excel sheet. To display formula results, select them and press F2 followed by Enter. Change the width of the columns, if necessary, to see all the data.