Free, private calculators for every step — trying to conceive, pregnancy, and your baby's first years. Due dates, ovulation, growth percentiles, sleep schedules and more.
Private. Secure. No sign-up required.
Estimate your due date based on LMP or conception date.
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Find your fertile window and best time to conceive.
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Predict your next periods and track your cycle.
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Work out when you likely conceived from your due date or LMP.
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Estimate your implantation window and earliest test date.
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Precise due dates from your embryo transfer or egg retrieval.
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Find out exactly how far along you are, week by week.
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Calculate hCG doubling time and early pregnancy progress.
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See typical beta-hCG ranges for each week of pregnancy.
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Try the traditional boy-or-girl chart — just for fun.
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How much breast milk or formula your baby needs by weight.
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See your healthy weight-gain range by week and BMI.
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Find weight, height and head percentiles on WHO & CDC charts.
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Build an age-based nap and sleep schedule for your baby.
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Track contractions, timing, duration and frequency.
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Convert your pregnancy week into months and trimester.
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Date your pregnancy from your last period, scan or due date.
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Work backward from your due date to your conception window.
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Find the earliest and best day to take a pregnancy test.
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See how many days past ovulation you are and what it means.
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Count your baby’s movements with the 10-kicks method.
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Estimate how tall your child will be as an adult.
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Your data stays on your device. We don't store your personal information.
Each tool cites the medical guidance it is based on, like ACOG and the NHS.
Created by a parent who gets it. Simple, helpful and made with care.
Built for parents in the US, UK, Australia and around the world.
Clear, evidence-informed answers on trying to conceive, pregnancy, labor and your baby's first year — each paired with a calculator.
The signs of ovulation — egg-white cervical mucus, the LH surge, a basal body temperature rise and more — and how to spot your fertile window each cycle.
Read guide →
Early PregnancyImplantation spotting and an early period can look alike. Here's how they differ in timing, color, flow and how long they last — and how to know for sure.
Read guide →
Labor & DeliveryBraxton Hicks are practice contractions that come and go. Here's what they feel like, how they differ from true labor, and how timing your contractions can tell you which is which.
Read guide →