Your complete nutrition
toolkit — free.
18 science-backed calculators covering calories, macros, BMI, body fat, TDEE, fasting, and more. Real-time results, no account needed.
Instant Results
All calculations update in real-time as you type. No "Calculate" button needed.
Science-Backed
Formulas sourced from peer-reviewed research: Mifflin-St Jeor, US Navy, Epley.
Clear Visualisation
Colour-coded scales, progress bars and macro charts make results easy to read.
Always Free
Every calculator, every feature — no account, no paywall, no signup ever.
Every nutrition tool you need
From basic calorie counting to advanced body composition metrics — all free, all instant.
Calorie Calculator
Daily calorie needs via Mifflin-St Jeor
TDEE Calculator
Total daily energy expenditure
BMI Calculator
Body mass index with health range
Calorie Deficit
Calories to hit your weight goal
Body Fat %
US Navy formula — tape measure only
Ideal Weight
4 formulas: Hamwi, Miller, Robinson
Macro Calculator
Protein, carbs, fat in grams
Protein Intake
Goal-based protein targets
Keto Macros
Net carbs + keto macro split
BMR Calculator
Basal metabolic rate, 2 formulas
Carb Calculator
Daily carbs by diet type
Fat Intake
Daily fat targets with food split
Results in seconds
Pick a calculator
Choose from 18 free tools organised by category. Body, macros, fitness, or advanced.
Enter your details
Height, weight, age, activity level. Supports both metric (kg/cm) and imperial (lbs/ft).
See instant results
All calculations update live as you type. Export results or follow cross-tool recommendations.
Ready to take control of your nutrition?
Jump into the dashboard to pick any of the 18 tools — themed cards, category sections, and one click to open.
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