Fitness Calculators
Free tools to help you plan your training and nutrition. No sign-up required.
TDEE Calculator
Find your Total Daily Energy Expenditure
Macro Calculator
Calculate your protein, carbs, and fat targets
1RM Calculator
Estimate your one-rep max from any weight and reps
BMI Calculator
Calculate your Body Mass Index
Body Fat Calculator
Estimate body fat percentage (Navy method)
Calorie Burn Calculator
See how many calories any activity burns
Heart Rate Zone Calculator
Find your training heart rate zones
Ideal Weight Calculator
Estimate your ideal weight from 4 formulas
Pace Calculator
Convert between pace, speed, and time for running
Water Intake Calculator
Find out how much water you should drink daily
Plate Calculator
See which plates to load on each side of the bar
Frequently Asked Questions
Are these calculators free?
Yes, all calculators on this page are completely free to use with no sign-up required. They're also available in the LumaFit app for on-the-go access.
How accurate are these calculators?
Our calculators use established, peer-reviewed formulas (Mifflin-St Jeor for TDEE, Brzycki for 1RM, Navy method for body fat). They provide good estimates, but individual results vary. Use them as a starting point and adjust based on your real-world progress over 2-4 weeks.
Which calculator should I start with?
Start with the TDEE Calculator to find out how many calories you burn daily, then use the Macro Calculator to set your protein, carbs, and fat targets. If you're lifting weights, the 1RM Calculator helps you programme training percentages.
Your next step
Build a routine that works in real life.
Bring your training, nutrition, programmes and progress together in LumaFit.