Free face shape calculator using forehead, cheekbones, jawline and face length to classify your face as oval, round, square, heart or diamond.

Estimate your conception date, due date, and gestational age using due date or LMP with this free conception date calculator.

Predict your next period start/end, ovulation day, and fertile window from LMP and cycle length with this free period calculator.

Convert mmol/L to mg/dL (or mg/dL to mmol/L) instantly using molar mass. Includes glucose presets + custom molecules. Live, accurate, simple.

Estimate a child’s possible blood types from parents’ ABO and Rh factors. Get instant % chances for A, B, AB, O, Rh+ and Rh−.

Check your child’s height percentile (0–5 years) using the WHO LMS method. Enter age, sex, and height to get percentile, z-score, and band.

Calculate your IQ percentile using μ=100 and σ=15 or 16. See percentile plus percent above and below instantly with live results.

Estimate your child’s future adult height using Khamis–Roche or mid-parental method. Works in cm/kg or ft/in/lb. Fast & free.

Free cholesterol ratio calculator. Enter total, HDL, LDL and triglycerides to get TC/HDL, LDL/HDL, TG/HDL, non-HDL and estimated LDL in seconds.