Pregnancy Calculator

The Pregnancy Calculator can estimate a pregnancy schedule based on the provided due date. An estimated due date, usually based on a sonogram, is typically obtained from a healthcare provider during a prenatal visit. It is also possible to estimate due date based on biological cycle using the Due Date Calculator.

Your Due Date:


You are currently at week #23 (22 weeks 6 days or 5 months 9 days) of pregnancy.

You are in the second trimester.

On average, your baby is around 11.38 inches (28.9 cm) long and weighs around 1.1 pounds (501 grams).

Your baby was likely conceived on Nov 27, 2017

You are 57% of the way through your pregnancy. 57%

WeekDateTrimesterImportant Milestones
Week 1Nov 14, 2017 - Nov 20, 2017first
Week 2Nov 21, 2017 - Nov 27, 2017
Week 3Nov 28, 2017 - Dec 4, 2017Baby conceived
Week 4Dec 5, 2017 - Dec 11, 2017Pregnancy test positive
Week 5Dec 12, 2017 - Dec 18, 2017 
Week 6Dec 19, 2017 - Dec 25, 2017Heartbeat detectable by ultrasound
Week 7Dec 26, 2017 - Jan 1, 2018
Week 8Jan 2, 2018 - Jan 8, 2018 
Week 9Jan 9, 2018 - Jan 15, 2018
Week 10Jan 16, 2018 - Jan 22, 2018
Week 11Jan 23, 2018 - Jan 29, 2018
Week 12Jan 30, 2018 - Feb 5, 2018
Week 13Feb 6, 2018 - Feb 12, 2018second
Miscarriage risk decreases
Week 14Feb 13, 2018 - Feb 19, 2018 
Week 15Feb 20, 2018 - Feb 26, 2018
Week 16Feb 27, 2018 - Mar 5, 2018
Week 17Mar 6, 2018 - Mar 12, 2018
Week 18Mar 13, 2018 - Mar 19, 2018Baby begins making noticeable
movements, can hear sounds,
and gender can be found out.
Week 19Mar 20, 2018 - Mar 26, 2018
Week 20Mar 27, 2018 - Apr 2, 2018
Week 21Apr 3, 2018 - Apr 9, 2018
Week 22Apr 10, 2018 - Apr 16, 2018 
Week 23Apr 17, 2018 - Apr 23, 2018 (today)Premature baby may survive
Week 24Apr 24, 2018 - Apr 30, 2018 
Week 25May 1, 2018 - May 7, 2018
Week 26May 8, 2018 - May 14, 2018
Week 27May 15, 2018 - May 21, 2018
Week 28May 22, 2018 - May 28, 2018third
Baby can breathe
Week 29May 29, 2018 - Jun 4, 2018 
Week 30Jun 5, 2018 - Jun 11, 2018
Week 31Jun 12, 2018 - Jun 18, 2018
Week 32Jun 19, 2018 - Jun 25, 2018
Week 33Jun 26, 2018 - Jul 2, 2018
Week 34Jul 3, 2018 - Jul 9, 2018
Week 35Jul 10, 2018 - Jul 16, 2018
Week 36Jul 17, 2018 - Jul 23, 2018
Week 37Jul 24, 2018 - Jul 30, 2018
Week 38Jul 31, 2018 - Aug 6, 2018Full Term
Week 39Aug 7, 2018 - Aug 13, 2018
Week 40Aug 14, 2018 - Aug 20, 2018
Week 41Aug 21, 2018 - Aug 27, 2018
Week 42Aug 28, 2018 - Sep 3, 2018
* The results of this calculator are estimations based on averages for single pregnancy. The results for twin pregnancy or multiple pregnancy are different.

RelatedOvulation Calculator | Conception Calculator

Pregnancy Term & Due Date

Pregnancy is a term used to describe a woman's state over a time period (~9 months) during which one or more offspring develops inside of a woman. Childbirth usually occurs approximately 38 weeks after conception, or about 40 weeks after the last menstrual period. The World Health Organization defines a normal pregnancy term to last between 37 and 47 weeks. During a person's first OB-GYN visit, the doctor will usually provide an estimated date (based on a sonogram) at which the child will be born, or due date. Alternatively, the Due Date Calculator can also be used to estimate due date based on a person's last menstrual period.

While the due date can be estimated, the actual length of a pregnancy depends on various factors including age, length of previous pregnancies, and weight of the mother at birth.1 However, there are still more factors affecting natural variation in pregnancy term that are not well understood. Studies have shown that fewer than 4% of births occur on the exact due date, 60% occur within a week of the due date, and almost 90% occur within two weeks of the due date.2 As such, while it is possible to be fairly confident that a person's child will be born within about two weeks of the due date, it is currently not possible to predict the exact day of birth with certainty.

Pregnancy Detection

Pregnancy can be detected either by using pregnancy tests, or by the woman herself noticing a number of symptoms including a missed menstrual period, increased basal body temperature, fatigue, nausea, and increased frequency of urination.

Pregnancy tests involve detection of hormones that serve as biomarkers for pregnancy and include clinical blood or urine tests that can detect pregnancy from six to eight days after fertilization. While clinical blood tests are more accurate, and can detect exact amounts of the hormone hCG (which is only present during pregnancy) earlier and in smaller quantities, they take more time to evaluate and are more expensive than home pregnancy urine tests. It is also possible to get a clinical urine test, but these are not necessarily more accurate than a home pregnancy test, and can potentially be more costly.

Pregnancy Management

There are a number of factors that need to be considered during pregnancy, many of which are highly dependent on the individual's situation, such as medication, weight gain, exercise and nutrition.


Taking certain medications during pregnancy can have lasting effects on the fetus. In the U.S. drugs are classified into categories A, B, C, D and X by the Food and Drug Administration (FDA) based on potential benefits vs. fetal risks. Drugs that have positive benefit for the mother with low risk to the fetus are classified as category A, while drugs with proven, significant fetal risks that outweigh potential benefits to the mother are classified a category X. A person that is pregnant should consult their doctor regarding any medications they plan to use during their pregnancy.

Weight gain:

Weight gain is a largely inevitable and necessary aspect of pregnancy that varies between people. It affects many aspects of fetal development such as the weight of the baby, the placenta, extra circulatory fluid, and its fat and protein stores. Weight management merits consideration because insufficient or excessive weight gain can have negative effects for both mother and fetus including the need for cesarean section (C-section) and gestational hypertension. While the values vary between women, the Institute of Medicine recommends an overall pregnancy weight gain of 25-35 pounds for women who are considered "normal" weight (BMI 18.5-24.9), 28-40 pounds for those considered underweight (BMI < 18.5), 15-25 pounds for those considered overweight (BMI 25-29.9), and 11-20 pounds for those considered obese (BMI > 30).3 Our Pregnancy Weight Gain Calculator is based on the Institute of Medicine recommendations.


Studies indicate that aerobic exercise during pregnancy helps to improve or maintain physical fitness as well as possibly decreasing the risk of C-section. Although it varies between women, regular aerobic and strength-conditioning exercise are often recommended for pregnant women, and women who exercised regularly before pregnancy, who have uncomplicated pregnancies, should be able to continue high intensity exercise programs.4 The American College of Obstetricians and Gynecologists suggests that given an uncomplicated pregnancy, fetal injuries are unlikely to occur as a result of exercise. Nevertheless, caution is advised, and a pregnant woman should consult their doctor if any of the following symptoms present: vaginal bleeding, shortness of breath, dizziness, headache, calf pain or swelling, amniotic fluid leakage, decreased fetal movement, preterm labor, muscle weakness, or chest pain.5


Nutrition during pregnancy is particularly important for the health of the mother and baby. Pregnancy requires different nutritional considerations than a person would have in a non-pregnant state, due to increased energy and specific micronutrient requirements.6

Certain vitamins such as Vitamin B9, also known as folic acid, can help decrease the risk of certain defects, while other nutrients such as DHA omega-3 that is necessary for proper brain and retinal development cannot be produced efficiently by infants, and can only be obtained through the placenta during pregnancy, or in breast milk after birth. There are many other micronutrients that aid proper fetal development, and there exist myriad sources of information on what pregnant women should or shouldn't eat or do. All of the information can be different to sift through and can vary from person to person. Pregnant women should consult their doctors and/or dietitian to help determine the best course of action for their own specific needs.

  1. Jukic, AM, Baird, DD, Weinberg, CR, et al. 2013. "Length of human pregnancy and contributors to its natural variation. Human Reproduction 28(10): 2848-55. PMC3777570.
  2. Moore, Keith. 2015. "How accurate are 'due dates'?" BBC, February 3, 2015.
  3. Institute of Medicine. 2009. "Weight Gain During Pregnancy: Reexamining the Guidelines." National Academies Press.
  4. Davies, GA, Wolfe, LA, Mottola, MF, et al. 2003. "Exercise in pregnancy and the postpartum period." Journal of Obstetrics and Gynaecology Canada 25(6): 516-29.
  5. Artal, R., O'Toole, M. 2003. "Guidelines of the American College of Obstetricians and Gynecologists for exercise during pregnancy and the postpartum period." British Journal of Sports Medicine 37: 6-12. doi:10.1136/bjsm.37.1.6
  6. Lammi-Keefe, CJ, Couch, SC, Philipson, E. 2008. "Handbook of Nutrition and Pregnancy." Humana Press.