Health Calculators — United Kingdom

Open the Bmi Calculator and calculate instantly in your browser.

Open the Body Fat Calculator and calculate instantly in your browser.

Open the Body Mass Index Advanced Calculator and calculate instantly in your browser.

A healthy weight range for your height — Devine, Robinson, Miller and Hamwi formulas plus the BMI range.

Open the Calorie Calculator and calculate instantly in your browser.

Your daily protein target in grams from bodyweight and goal, with a per-meal split and food equivalents.

How much water to drink a day — from your bodyweight, exercise and climate, with the 8-glasses rule in context.

Your max heart rate and five training zones from age — with the Karvonen resting-HR method for personal zones.

Pace, speed and even splits from a distance and time — plus 5K, 10K, half and marathon race predictions.

Estimate your one-rep max from any weight and reps — Epley, Brzycki and more — plus a %1RM training-load table.

Estimate your due date from your last period, conception date or IVF transfer — with gestational age and trimester.

Your fertile window and ovulation date from your last period and cycle length — with the best days to conceive.

Open the Cost of Smoking Calculator and calculate instantly in your browser.

Open the Carbon Footprint Calculator and calculate instantly in your browser.