BodyCalAll calculators
Every tool is free, runs entirely in your browser, and is built on peer-reviewed formulas.
Nutrition & Diet
Calorie Deficit Calculator
Find your maintenance calories (TDEE), your ideal daily calorie target, and an interactive week-by-week weight loss forecast with a predicted goal date.
Calculate nowMacro Calculator
Calculate your daily macros — protein, carbs, and fat — for your goal, with a personalized calorie target and a visual breakdown.
Calculate nowProtein Intake Calculator
Find how much protein to eat per day for your goal, with per-meal targets and a simple, sustainable recommendation.
Calculate nowTDEE Calculator
Calculate your Total Daily Energy Expenditure — the calories you burn in a day — with a clear breakdown across every activity level.
Calculate nowBMR Calculator
Calculate your Basal Metabolic Rate — the calories you burn at rest — using three proven formulas, side by side.
Calculate nowIntermittent Fasting Calculator
Plan your intermittent fasting schedule — 16:8, 18:6, 20:4, or OMAD — with your exact eating and fasting windows on a visual timeline.
Calculate nowWater Intake Calculator
Get a personalized daily water recommendation based on your weight, activity level, and climate — in litres and glasses, with a visual hydration tracker.
Calculate nowBody Composition
Full Body Report
Enter your details once and get your complete health snapshot — BMI, body fat, waist-to-height ratio, calories, ideal weight, protein, water, and steps, all on one page.
Calculate nowBMI Calculator
Calculate your Body Mass Index instantly with a beautiful visual scale, see your category, and understand what your score actually means for your health.
Calculate nowWaist-to-Height Ratio Calculator
Check your waist-to-height ratio — a simple health marker that predicts heart and diabetes risk better than BMI. See your risk category on a visual scale.
Calculate nowBody Fat Calculator
Estimate your body fat percentage with the U.S. Navy method, see your fitness category, and get your fat mass and lean mass breakdown.
Calculate nowIdeal Weight Calculator
Estimate your ideal body weight using four peer-reviewed formulas (Devine, Robinson, Miller, Hamwi) plus your healthy BMI range, visualized beautifully.
Calculate nowWellness
Daily Steps Calculator
Find how many steps a day are healthy for your age, weight, and goal — with the calories you'd burn and the distance you'd cover.
Calculate nowSleep Calculator
Find the best time to go to bed or wake up based on 90-minute sleep cycles, so you wake up refreshed instead of groggy.
Calculate nowReaction Time Test
Test your reaction time — click the instant the box turns green and see your speed in milliseconds, with your best and average across multiple tries.
Calculate nowMore on the way
Running Pace · Calories Burned · Heart Rate Zones — all built on the same shared engine.