pregnancy Calculators
Last updated: May 2026
Due Date Calculator
Estimates your baby's due date by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP) using Naegele's Rule.
Pregnancy Weight Gain Calculator
Estimates how much weight you should have gained by a given week of pregnancy based on your pre-pregnancy BMI, using IOM-aligned weekly rates.
Conception Date Calculator
Estimates the most likely conception date by counting back 266 days (38 weeks) from your due date.
Gestational Age Calculator
Converts the number of days since your last menstrual period into gestational age expressed as weeks and days.
Pregnancy Calorie Needs Calculator
Calculates how many daily calories you need during pregnancy based on your pre-pregnancy intake and current trimester, using WHO/USDA-aligned trimester additions.
Fetal Weight Estimator
Estimate your baby's approximate weight based on gestational age in weeks.
Pregnancy Body Changes Calculator
Track how your waist measurement is expected to expand week by week during pregnancy.
Pregnancy Hydration Calculator
Find out how many millilitres of fluid you should drink each day while pregnant, adjusted for your weight and activity level.
Pregnancy Exercise Heart Rate Calculator
Calculate a safe upper target heart rate for exercise during pregnancy based on your age and pre-pregnancy fitness level.
Pregnancy Sleep Calculator
Find out how many additional hours of sleep you need each night during pregnancy and how much of a deficit you currently carry.
Due Date Calculator
Estimates how many days remain until your due date and your current pregnancy week from how many days ago your last period (or conception/ultrasound reference) was, plus cycle length and any ultrasound adjustment.
Conception Date Calculator
Works backward from how many days remain until a known due date to estimate when conception occurred (and how far along you are).
Pregnancy Calorie Calculator
Calculates your total daily calorie needs during pregnancy by combining your basal metabolic rate, activity level, and trimester-specific energy additions.
Baby Size Calculator
Estimates fetal weight and size using gestational age alone or ultrasound measurements (BPD, FL, AC).
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.
Contraction Timer Calculator
Track contraction duration, frequency, and pain level to estimate labor progress and determine when to head to the hospital.
Maternity Leave Calculator
Estimate total paid maternity leave income by combining statutory benefit payments with any employer top-up.
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.
Pregnancy Risk Assessment Calculator
Score pregnancy risk based on maternal age, pre-pregnancy BMI, obstetric history, health conditions, and lifestyle factors.
Fertility & Ovulation Calculator
Predicts how many days until your fertile window opens from how many days ago your last period started, your average cycle length, luteal phase, and how regular your cycles are.
Baby Size & Growth Calculator
Estimate your baby's weight at any point in pregnancy by entering gestational age and parental size.
Conception Date Calculator
Estimates how many days ago conception occurred from a reference point — your due date, last menstrual period, or an ultrasound dating scan — entered as days since that reference (negative if it is a future due date).
Pregnancy Blood Volume Calculator
Estimate how pregnancy expands your blood volume and how that dilution affects your hemoglobin level.
Pregnancy Risk Assessment Calculator
Score potential risk factors in pregnancy — including maternal age, BMI, medical history, and lifestyle — to get a composite risk indicator.
Pregnancy Sleep & Rest Calculator
Calculate how many hours of sleep you should aim for each night based on your trimester, work demands, sleep quality, and current symptoms.
Pregnancy Exercise & Fitness Calculator
Estimates calories burned during pregnancy workouts based on your trimester, fitness level, exercise type, and session duration.
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.
Fetal Growth Calculator
Estimates fetal weight from ultrasound biometry measurements including abdominal circumference, biparietal diameter, and femur length.
Ovulation & Fertility Calculator
Predicts how many days until ovulation and your fertile window from how many days ago your last period started, your cycle length and luteal phase — and can project a later cycle.
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.
Gestational Diabetes Risk Calculator
Estimate your gestational diabetes risk score using BMI, age, family history, prior GD, and ethnicity.
Baby Gear Budget Calculator
Estimate your total first-year baby costs by selecting a budget tier, feeding plan, clothing strategy, and childcare months.
Prenatal Nutrition Calculator
Calculate your recommended daily folate, iron, and combined nutritional score for each stage of pregnancy and breastfeeding.
Contraction Pattern Calculator
Assess your labor progression stage by entering contraction duration, frequency, pain intensity, and how long contractions have been occurring.
Ovulation Calculator
Find your estimated ovulation day and 6-day fertile window from how many days ago your last period started, your average cycle length, and your luteal phase.
Fetal Growth Percentile Calculator
Estimates fetal weight from ultrasound biometry (BPD, HC, AC, FL) and plots it against gestational-age percentiles.
Breastfeeding Calorie Calculator
Calculates total daily calorie needs for breastfeeding mothers by combining your Mifflin-based BMR, activity level, and an evidence-based breastfeeding surplus.
Due Date Calculator (Naegele's Rule)
Estimate your due date from your last menstrual period using Naegele's rule, adjusted for your actual cycle length and luteal phase so a non-28-day cycle isn't misdated.
Ovulation & Fertile Window Calculator
Pinpoint your likely ovulation day and fertile window from your cycle length, luteal phase, and the cycle day you're on today — based on the fixed-luteal-phase method.
Conception Date Estimate Calculator
Estimate how many days ago conception likely occurred from your last menstrual period, corrected for your cycle length and luteal phase rather than assuming day-14 ovulation.
Pregnancy Weeks to Months Converter
Convert pregnancy weeks and days into months and identify your trimester, using either calendar months or four-week 'lunar' months — the two conventions that cause confusion.
Baby Feeding Amount Calculator (per Feeding)
Estimate how much milk a formula-fed baby needs per feeding from body weight, feeds per day, and the standard daily intake per kilogram — in millilitres or ounces.
Diaper Cost Estimate Calculator
Project the total cost of diapers and wipes over any number of months from how many you use per day and the price of each — the real recurring baby expense.