Pregnancy & family calculators

Enter your household’s laundry rhythm and the clothing changes you expect in a day. The calculator estimates a practical rotation for one baby clothing size, including outfits that stay outside the home.

Choose an expected birth month to map common baby clothing age bands to calendar seasons. Use the timeline to decide which sizes may need warm, cool, or transitional-weather layers before the baby arrives.

Enter your change rate, wash timing, drying time, reserve stock, and current inventory. The calculator turns that routine into a diaper stash, buy list, cover estimate, and washer-load plan.

Enter the crown-rump length from a first-trimester ultrasound to estimate gestational age in weeks and days. If you add LMP dating, the calculator also shows the signed discrepancy, expected CRL, and the ACOG redating threshold.

Choose a starting size and planning period to estimate how many diapers to keep in each size. The result uses the Pampers size-duration chart, then lets you adjust daily use, reserve stock, and unit cost.

Enter the gestational age and measured symphysis-fundal height to compare the measurement with the INTERGROWTH-21st international standard for singleton pregnancies.

Enter the four biometric measurements from an ultrasound report to estimate fetal weight with the Hadlock IV equation. The result also shows how much the estimate moves when each measurement is shifted by a small tolerance.

Enter two quantitative beta-hCG results and the hours between blood draws. The calculator shows the observed change, an equivalent 48-hour rise, doubling or half-life time, and the level-adjusted reference minimum for that interval.

Enter your age, height, prepregnancy weight, current weight, gestational week, and activity level. The calculator uses the 2023 DRI pregnancy energy equation and shows the BMI-based adjustment behind the result.

Enter the gestational age from the current dating method and the gestational age reported by ultrasound. The calculator compares the difference with ACOG redating thresholds and shows whether the entered dates point to routine redating, no routine change, or clinician review.