Useful estimates. Clear limits.
Start with the number, see exactly how it was calculated and keep the context visible. No false precision and no result pretending to be medical advice.
Three questions. Three useful views.
Each calculator is free, works in the browser and links to the recognised source behind the method or reference point.
01Calorie needs calculator
Estimate resting energy and a practical daily range from the Mifflin-St Jeor equation.
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02Protein calculator
Turn body weight and training context into a transparent daily protein range.
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03Workout frequency calculator
See how a realistic weekly schedule compares with the UK adult activity reference.
Open calculatorThe method should never be hidden behind the answer.
Every output names the equation, range or public-health reference behind it.
Every result stays on your device and is recalculated instantly as your inputs change.
Every tool explains when an estimate is not the right substitute for individual advice.