Calcuma
Free tools

Fitness math,
done right.

Accurate calculators that adjust to your body — not one-size-fits-all guesses. No accounts, no noise.

Steps

Steps to Miles Convert your daily steps into miles. Steps to Kilometers Convert your steps into kilometers. Steps to Calories Estimate calories burned from your step count. Steps to Distance Turn steps into distance in miles or km. Steps per Day Find out how many steps you should aim for daily. How many steps in a mile? The real number, by height — and why the 2,000 rule is rough. 10,000 steps in miles What 10,000 steps actually covers, and where it came from. 10,000 steps a day: the truth What the science really says about the famous goal.

Wearables

Fitbit Steps to Miles Convert Fitbit steps to miles and match your tracker. Apple Watch Steps to Miles Turn Apple Watch steps into miles, with calibration tips. Step Counter Accuracy How accurate are step trackers, really? The evidence.

Pace & Running

Pace Converter Convert pace between min/km and min/mile. Running Pace Calculator Find your pace from a distance and time. Finish Time Calculator Predict your race finish time from a pace. 5K Pace Calculator Get the pace and splits for your goal 5K time.

Calories & Weight

BMR Calculator Your basal metabolic rate (calories at rest). TDEE Calculator Daily calories burned, plus weight goals. Calories Burned Walking Calories burned from a walk by time and pace. Calories Burned Running Calories burned on a run by distance and weight.

Body Metrics

BMI Calculator Body mass index with your healthy weight range. Body Fat Calculator Estimate body fat % with the US Navy method. Ideal Weight Calculator Your healthy weight range for your height.