Everything you need to calculate your fitness journey.
Free, accurate fitness calculators with clear explanations, charts and actionable tips — not just a number.
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Popular calculators
Calorie Calculator
How many calories to hit your goal.
TDEE Calculator
Find the calories you burn each day.
Macro Calculator
Split your calories into protein, carbs & fat.
Protein Calculator
Your daily protein target, dialled in.
BMI Calculator
Check your Body Mass Index in seconds.
Body Fat Calculator
Estimate body fat % with a tape measure.
One Rep Max Calculator
Estimate your max lift from any set.
Calories Burned Calculator
Energy spent on any activity.
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Latest articles
Progressive Overload: The Only Way to Keep Getting Stronger
Every effective training programme runs on one principle. Here's what progressive overload really means, the many ways to apply it, and how to break through plateaus.
BMI vs Body Fat: Which Actually Matters?
BMI is everywhere, but it can't tell muscle from fat. Here's when BMI is useful, where it falls apart, and why body-fat percentage tells a richer story.
How Much Protein Do You Really Need?
Protein is the most over-debated macro in fitness. Here's what the research actually says about daily targets, timing, and whether you can overdo it.
Questions
Frequently asked
Yes — every calculator is completely free to use, with no sign-up required. We show clear explanations and science-backed formulas alongside every result.
We use peer-reviewed formulas (like Mifflin–St Jeor for metabolism) and cite our sources. Predictive equations are estimates — use them as a starting point and refine with your own data.
Yes. Every relevant calculator lets you switch between metric (kg, cm) and imperial (lb, in) with a single tap.
No. All calculations run instantly in your browser — nothing you enter is sent to a server or saved.
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