Calculator category
Pregnancy & Maternal Health calculators
BMI-based pregnancy weight gain, gestational planning, and maternal health calculators with conservative safety notes.
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Pregnancy Weight Gain Calculator
Estimate recommended pregnancy weight gain ranges from pre-pregnancy BMI, gestational age, and singleton or twin pregnancy status.
Pregnancy Due Date from Ultrasound Calculator
Estimate due date from an ultrasound date and gestational age reported on that scan, with dating-method cautions.
Pregnancy Due Date from LMP Calculator
Estimate due date and current gestational age from the first day of the last menstrual period, with cycle-length adjustment.
Pregnancy BMI Calculator
Calculate pre-pregnancy or current adult BMI for pregnancy planning context and link it to weight-gain categories.
Pregnancy Caffeine Limit Calculator
Add up daily caffeine sources during pregnancy and compare the total with the commonly cited 200 mg/day limit.
Twin Pregnancy Weight Gain Calculator
Estimate total twin-pregnancy weight-gain range by pre-pregnancy BMI using CDC/NAM ranges, with individualized-care warnings.
Contraction Pattern Timer
Check contraction frequency, duration, and observation time against common call-your-provider patterns such as regular 5-minute contractions lasting about 60 seconds.