Fitness

18 calculators

Fitness

Calorie, BMI, macros, and workout calculators

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18 available

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BMI Calculator

Calculate Body Mass Index and health status

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Calorie Calculator

Calculate daily calorie needs for weight goals

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Macro Calculator

Calculate macronutrient ratios for your goals

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Pace Calculator

Calculate running and walking pace, time, or distance

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BMR Calculator

Calculate your Basal Metabolic Rate (BMR) using Mifflin-St Jeor, Revised Harris-Benedict, and Katch-McArdle formulas.

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Calories Burned Calculator

Estimate calories burned for any activity using MET values and your body weight.

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All Fitness calculators

Ideal Weight Calculator

Find your ideal weight based on multiple formulas

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Protein Calculator

Calculate daily protein intake requirements

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Body Fat Calculator

Estimate body fat percentage using measurements

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One Rep Max Calculator

Calculate your one rep max and training percentages

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Water Intake Calculator

Calculate daily water intake requirements

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Heart Rate Zones

Calculate target heart rate zones for training

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Steps to Distance Calculator

Convert steps to kilometres or miles (and back) using your own stride length instead of a one-size-fits-all guess.

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Steps to Calories Calculator

Estimate the calories burned walking a given number of steps, using your body weight, stride and walking pace.

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Walking Time Calculator

Work out how long a walk takes from a distance in kilometres, miles or steps — with an editable walking speed.

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MET-Minutes per Week Calculator

Calculate weekly exercise volume as MET-minutes per week.

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APE Index Calculator

Compare arm span with height using the transparent APE index formula.

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Protein Intake Calculator

Estimate a daily protein target from body weight, activity level, and goal.

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Fitness calculators — Frequently asked questions

Quick answers about the fitness tools on Mathify.

What fitness calculators are offered?+

BMI, calorie, macro, TDEE, BMR, pace, and step converters.

Are calorie estimates personalized?+

Yes. They use your age, weight, height, and activity level.

Is fitness data private?+

Yes. Everything is computed locally in your browser.

Fitness calculators — Frequently asked questions

Quick answers about the fitness tools on Mathify.

What fitness calculators are offered?+

BMI, calorie, macro, TDEE, BMR, pace, and step converters.

Are calorie estimates personalized?+

Yes. They use your age, weight, height, and activity level.

Is fitness data private?+

Yes. Everything is computed locally in your browser.