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Macro Calculator

Splits your daily calories into protein, carbohydrate and fat grams for several common diet approaches.

Calculators Nothing uploaded No sign-up Free, unlimited
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Enter your figures and press Calculate.
In short Macro Calculator is a free online tool on inputtesthub.com that splits your daily calories into protein, carbohydrate and fat grams for several common diet approaches. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Macro Calculator

  1. Enter your figures in the input fields.
  2. The result updates as you type, together with the full working.
  3. Check the breakdown table to see exactly how the number was reached.

About the Macro Calculator

The Macro Calculator splits your daily calories into protein, carbohydrate and fat grams for several common diet approaches. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Turning a calorie target into a shopping list.
  • Comparing a keto split against a balanced one.
  • Hitting a protein target for strength training.

The maths behind it

This tool uses 4 kcal per gram of protein, 4 per gram of carbohydrate and 9 per gram of fat, applied to your chosen percentage split. Every intermediate value is shown on screen, so the result can be checked by hand.

Frequently asked questions

Is the Macro Calculator free, or is there a paid tier?
It is free, with no account, no trial and no daily cap. Every calculators tool on inputtesthub.com works the same way: open the page and use it.
Does anything I enter leave my computer?
No. The Macro Calculator runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
What is the equation behind the Macro Calculator?
It uses 4 kcal per gram of protein, 4 per gram of carbohydrate and 9 per gram of fat, applied to your chosen percentage split. The full working is printed under the result, so you can follow every step rather than trusting a black box.
What problem does the Macro Calculator solve?
The most common reasons people reach for it: turning a calorie target into a shopping list. Comparing a keto split against a balanced one. Hitting a protein target for strength training. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
How precise is the result?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.

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