BMI calculator
Compare weight with height using the standard adult Body Mass Index formula.
Your estimate
Enter your height and weight to see your BMI and healthy-weight range.
Know your numbers. Train with intent.
Eight straightforward calculators for everyday training, nutrition, and recovery. Choose a tool, enter your details, and get an instant estimate.
WHO ranges
Daily calorie needs
Estimate your basal metabolic rate and total daily energy expenditure.
Your estimate
Add your details to estimate maintenance calories, BMR, and goal ranges.
Body fat estimate
Use circumference measurements for a practical estimate. Measure against skin, without compressing it.
Your estimate
Add three or four body measurements to estimate body-fat percentage.
Running pace
Convert a finish time and distance into pace, speed, and common race projections.
Your pace
Enter a distance and finish time to see pace per kilometer and mile.
One-rep max
Estimate the most weight you could lift for one repetition from a recent working set.
Estimated one-rep max
Enter the weight and reps from a challenging set. Lower-rep sets produce better estimates.
Macro planner
Split a daily calorie target into protein, carbohydrate, and fat grams.
Daily targets
Add a calorie target, body weight, and goal to create a macro split.
Hydration estimate
Start with a body-weight baseline, then account for exercise and hot conditions.
Daily fluid estimate
Enter your weight, exercise time, and conditions for a daily fluid starting point.
Heart-rate zones
Use age and resting pulse for personalized training zones based on heart-rate reserve.
Training zones
Use a resting pulse taken after waking for a more useful estimate.