Fitness calculators
Pick a calculator.
Every tool below lives at its own page and its own link — open one directly, bookmark it, or share it on its own.
BMR Calculator
Estimate resting energy needs with Mifflin-St Jeor.
Open toolTDEE / Daily Maintenance Calories Calculator
Start with Mifflin-St Jeor (and Katch-McArdle if body fat is measured), then dial in your real maintenance from 14-28 days of calories and morning weight.
Open toolDaily Nutrition / Macro Calculator
Convert calories into protein, carbs, and fats.
Open toolFat Loss Calculator
Estimate deficit size and target timeline.
Open toolBMI Calculator
Calculate body mass index and category.
Open toolBody Fat Calculator
Estimate body-fat percentage with Navy circumference inputs.
Open toolProtein Intake Calculator
Find a useful daily protein target and range.
Open toolWater Intake Calculator
Estimate daily hydration from body weight and training.
Open toolCalorie Deficit Calculator
Translate weekly fat-loss speed into daily calories.
Open toolIdeal Body Weight Calculator
Compare Devine formula weight with healthy BMI range.
Open toolWeight Goal / Timeline Calculator
Estimate weeks needed to reach a target weight.
Open toolFat-Loss Calorie & Macro Calculator
Bodyweight in pounds × an activity factor of 13–16, then your deficit and a protein / fat / carb split — with the arithmetic shown.
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