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Calculators

The maths, out in the open

The same formulas Besly uses inside the app. No sign-up, nothing stored — everything runs in your browser.

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Daily calorie needs

Mifflin-St Jeor plus your activity level, with the deficit spelled out.

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Protein target

How much protein per day for your weight and goal.

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Macro calculator

Calories split into protein, carbs and fat for your goal — balanced, high protein or low carb.

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Weight loss date

The daily calories to reach your goal weight, and an honest date for when.

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Steps to calories

What your steps really burn, based on your weight and stride.

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BMI

A blunt instrument — useful with context, which we give you.

Calories in common foods →