Pregnancy Calculators
Last updated: October 2026
Pregnancy Nutrition Calculator
Estimate daily protein, iron, folate, and calcium requirements during pregnancy based on your weight, trimester, age, and whether you are carrying multiples.
Baby Size Calculator
Estimates fetal weight and size using gestational age alone or ultrasound measurements (BPD, FL, AC).
Gestational Age Calculator
Converts the number of days since your last menstrual period into gestational age expressed as weeks and days.
Estimated Fetal Weight Calculator (Hadlock)
Estimates fetal weight from ultrasound biometry (BPD, HC, AC, FL) with the Hadlock four-parameter formula, It returns the estimated weight, not a percentile: compare the weight against a gestational-age growth chart to find the percentile.
Pregnancy Exercise & Fitness Calculator
Estimates calories burned during pregnancy workouts from your current weight, exercise type, and session duration, using standard MET values.
Fetal Weight Estimator
Look up the average fetal weight for any week from 10 to 40 using the Hadlock 1991 ultrasound weight standard, with the typical 10th to 90th percentile range.
Due Date Calculator
Calculates how many days remain until your estimated due date from how many days ago your last period (or conception) occurred, adjusting for cycle length or luteal phase.
Pregnancy Risk Assessment Calculator
Score potential risk factors in pregnancy β including maternal age, BMI, medical history, and lifestyle β to get a composite risk indicator.
Pregnancy Hemoglobin Dilution Calculator
Estimate how far the normal expansion of blood plasma in pregnancy dilutes your hemoglobin at a given week.
Gestational Diabetes Risk Calculator
Estimate a gestational diabetes risk index (0β100 points) from BMI, age, family history, prior GD, and ethnicity.
Conception Date Calculator
Estimates the most likely conception date by counting back 266 days (38 weeks) from your due date.
Fetal Growth Calculator
Estimate fetal weight from three ultrasound measurements (BPD, AC and FL) with the Hadlock 1985 formula and compare it with the Hadlock average weight for the week of pregnancy.
Pregnancy Water Intake Calculator
Estimate how much water to drink each day while pregnant from your weight and daily exercise, and compare it with the EFSA, US National Academies and ACOG guidance.
Pregnancy Cost Calculator
Estimates your total out-of-pocket costs for pregnancy and your baby's first year, covering medical care, delivery, childcare, and gear.
Pregnancy Body Changes Calculator
See the recommended weight gain for your week of pregnancy and pre-pregnancy BMI (Institute of Medicine 2009 guidelines), with the trimester and the fundal height a clinician would expect.
Pregnancy Week Calculator
Tells you how many weeks pregnant you are from how many days have passed since your reference date (LMP, conception, or due date), with a cycle-length adjustment in days.
Ovulation & Fertility Calculator
Find your likely ovulation date and six-day fertile window from the first day of your last period, your average cycle length and your luteal phase, for up to six cycles ahead.
Labor Contraction Calculator (5-1-1 Rule)
Check your timed contractions against the 5-1-1 guideline (5 minutes apart, 1 minute long, for 1 hour) and the signs of true versus practice labor.