Free Fitness Calculators — Calories Burned, Pace, VO₂ Max & More

Our fitness calculators use exercise science formulas to quantify training, track progress, and set targets. From MET-based calorie burn estimates to race-pace projections, each tool gives you data to train smarter.

Fitness progress is most consistent when it's measurable. These tools translate effort — steps, pace, weight lifted — into numbers you can track, compare, and optimise over time.

Endurance & Performance

Pace, VO₂ max, and aerobic capacity calculators.

Strength & Body

One-rep max, body composition, and military fitness standards.