Smarter fitness starts with exact numbers

Fast, accurate calculators to plan training and nutrition with confidence.

Popular Calculators

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BMI

Body mass index in seconds.

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BMR / TDEE

Daily energy needs by activity.

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Calorie Target

Maintain, cut, or bulk calories.

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Macros

Protein, carbs, fats in grams.

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Body Fat %

Quick BF% approximation.

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Hydration

Daily liter target by weight.

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Spotlight — Quick BMR

BMR: kcal • TDEE: kcal

Featured Insights

BMI vs. Body Fat %: Which Metric Really Matters?

Why BMI alone can mislead and how to get a clearer picture.

Master Your Macros: A Beginner’s Guide

Split protein, carbs, and fats the smart way.

Hydration & Performance: Why Water Matters

Small hydration tweaks for big gains.