Health & fitness

Estimate basal metabolic rate and daily calories using established equations and activity factors. Runs locally in your browser.

Estimate body fat % from tape measurements using the US Navy method. See your category, fat mass, and lean mass — no calipers or gym required.

Compute Body Mass Index from height and weight in metric or imperial. Fully client-side — no account, uploads, or remote storage.

Calculate your running pace, finish time, or distance instantly. Get race time predictions for 5K, 10K, half marathon, and marathon. Supports km and miles..

Estimate your 1RM from any submaximal lift. Uses Epley, Brzycki, and Lombardi formulas. Includes a full training percentage table for strength programming.

Estimate calories burned by activity, duration, and body weight using MET tables. Fully client-side — no account, uploads, or remote storage.

Calculate how much water you should drink per day based on your weight, activity level, and climate. See results in liters, oz, and number of glasses.

Calculate your Total Daily Energy Expenditure and daily calorie target for weight loss, maintenance, or muscle gain. Uses the Mifflin-St Jeor formula.

Calculate your daily protein, carb, and fat targets in grams from your calorie goal, body weight, and goal. Works for fat loss, maintenance, and muscle gain.