Free Health & Fitness Calculators

Calculate your Body Mass Index and see where you fall on the healthy weight chart.

Estimate the daily calories you need to maintain, lose, or gain weight.

Estimate body fat percentage using the U.S. Navy circumference method.

Find your Basal Metabolic Rate — the calories you burn at complete rest.

Estimate a healthy target weight using multiple medical formulas.

Calculate running or walking pace, time, or distance.

Calculate body fat using the U.S. Army AR 600-9 standard.

Estimate your fat-free mass — the weight of everything except body fat.

See your full healthy weight range based on BMI 18.5-24.9.

Estimate calories burned during exercise using MET values.

Estimate your 1RM from any rep range using Epley and Brzycki formulas.

Find your training heart-rate zones for fat burn, cardio, and peak.

See how far along you are, your trimester, and weeks remaining.

Track healthy weight gain throughout pregnancy.

Estimate when conception likely occurred based on your current pregnancy.

Estimate your baby's due date from your last menstrual period.

Find your fertile window and most likely ovulation date.

Estimate the best days to conceive based on your cycle.

Predict your next 3 periods based on your cycle.

Calculate your daily protein, carb, and fat targets.

Calculate your daily carb target.

Calculate optimal daily protein for weight loss, maintenance, or muscle gain.

Calculate your daily dietary fat target.

Find your Total Daily Energy Expenditure — calories burned across a full day.

Estimate kidney function using the CKD-EPI 2021 equation.

Estimate your somatotype — ectomorph, mesomorph, or endomorph tendencies.

Calculate body surface area using multiple validated formulas.

Estimate blood alcohol concentration from drinks consumed.