Estimate due date from last period with trimester milestones. Get the 40-week roadmap instantly — free, local, informational only.
Compute body surface area with four formulas (Mosteller, Du Bois, Haycock, Gehan & George) for medication dosing and physiology. Get m² from height and weight — free, local, informational only.
Calculate infant formula amounts by age and weight with feeding schedules. Get daily ounces and bottle splits right — free, local, informational only.
Estimate calories burned making breast milk by baby age and feeding frequency, at ~0.67 kcal per mL. Fuel milk production without guessing — free, local, informational only.
Get ISO week numbers for any date — plan sprints and fiscal weeks correctly. Know Week 32 means late July instantly — free, local, no signup.
Drop invoice or receipt PDFs and images; get vendor, date, invoice number, total, and a confidence flag per file as CSV rows. Bookkeepers close month-end without retyping — local Tesseract OCR, batches of 5 as guest, 25 signed-in, 500 on Pro.
LMP plus 280 days, adjusted by (cycle length − 28): LMP January 1, 2026 with a 28-day cycle gives October 8, 2026. Only ~5% arrive exactly on it — two weeks either side is normal.
Early ultrasound dating beats LMP math when cycles vary. Bring both dates to the first appointment.
Weeks 1–13, 14–27, 28–birth with milestone markers. The tool maps current week to what to expect next.
No — math runs locally in your browser. Health data never leaves your device.
Ovulation Tracker
Track your fertile window and estimated ovulation date based on your last menstrual period. Helps with family planning. Health data never leaves your device — every calculation runs locally in your browser.
Baby Growth Percentile Calculator
Compare baby weight and height against WHO median references by age and sex, shown as % above or below the median — a reference comparison, not clinical percentiles. Monitor your childs growth compared to population medians. Health data never leaves your device — every calculation runs locally in your browser.
Last updated October 2026