Gesundheits-Rechner

Everyday health and fitness math using standard published formulas — for general information only, not medical advice.

Herzfrequenzzonen-Rechner

Age (years)

Estimate your maximum heart rate and the five common training zones from your age.

Waist (cm) Hip (cm)

Compute the waist-to-hip ratio used in body shape and fitness tracking.

First day of last period

Estimate a due date by adding 280 days to the last period, the standard Naegele method.

Height (cm) Weight (kg)

Calculate body surface area with the widely used Mosteller square-root formula.

Formula Height (cm) Weight (kg)

Estimate lean body mass with the Boer formula and see the fat mass remainder.

Steps Stride length (m)

Convert a step count into kilometres, metres and miles using your stride length.

Packs per day Price per pack Years

See what smoking costs per week, per year and over the years — a powerful motivator.

Child Mother height (cm) Father height (cm)

Estimate a child's future adult height with the classic mid-parental method.