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Macro calculator

Fitness & health

Estimate daily protein, carbs and fat targets from calories.

Updated

Macro calculator

Estimate daily protein, carbs and fat targets from calories.

Input format: Line 1=calories, Line 2=protein %, Line 3=carb %

Output

Quick start

How to use macro-calculator

Enter input and view computed output.

  1. Step 1
    Enter input

    Paste or type your data in the input box.

  2. Step 2
    Compute

    The tool processes input instantly in your browser.

  3. Step 3
    Use output

    Copy output and continue your workflow.

In-depth guide

Macro calculator guide

Estimate daily protein, carbs and fat targets from calories. This tool is designed for fast local processing and practical day-to-day use.

Quick start

Paste input, review output instantly, then copy it for your workflow.

Input tips

Use one value per line for structured inputs. Common separators are handled gracefully.

Privacy

Processing runs in your browser tab for the MVP workflow, with no mandatory upload step.

When to use it vs alternatives

Use this tool when you want a quick health or training estimate from common public formulas. Use a clinician, coach, lab test, or sport-specific protocol for diagnosis, treatment, competition planning, or high-stakes decisions.

Common pitfalls

  • Measure consistently; posture, tape placement, hydration, and unit choice can shift results.
  • Formula-based estimates are population averages and may not fit every body type or training background.
  • Treat results as guidance, not a substitute for professional medical or coaching advice.

Frequently asked questions

How are my macros calculated?

It estimates daily calories from your stats and activity, then splits them into protein, carbohydrate and fat targets based on your chosen ratio.

How many calories are in each macro?

Protein and carbohydrate provide about 4 calories per gram, and fat about 9, which is how gram targets are derived from calories.

What protein target should I aim for?

A common range is 1.6 to 2.2 grams per kilogram of body weight for active people, but adjust to your goals and guidance.

Are these numbers exact?

No. They are estimates from population formulas. Track results for a couple of weeks and adjust intake based on real progress.

Should I see a professional?

Yes for medical or clinical needs. This tool is for general guidance, not personalised dietary or medical advice.

Is any data uploaded?

No. All calculations run locally in your browser.

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