Health & fitness calculators that just work.
Fifteen calculators for training, nutrition, running, and women's health. No signup, no fluff. Type the numbers, get the answer.
Fitness & Strength
Calorie targets, lifting maxes, and body composition tools for everyday training.
TDEE Calculator
Estimate your total daily energy expenditure, the calories you burn in a typical day.
One-Rep Max Calculator
Estimate your one-rep max (1RM) from a recent set. Includes a percentage table for programming.
BMI Calculator
Body Mass Index is a simple ratio of weight to height. Useful as a rough screening number, not a diagnosis.
Body Fat % Calculator
Estimate body fat percentage using the US Navy tape-measure method. No skinfold calipers required.
Macro Calculator
Get protein, carbs, and fat targets for cutting, maintaining, or lean gaining.
Wilks Score Calculator
Compare powerlifting totals across bodyweight using the Wilks 2020 coefficients.
Running & Cardio
Pace, heart-rate zones, and aerobic-fitness math for runners and conditioning work.
Running Pace Calculator
Convert between distance, time, and pace. Plan a tempo run or back-solve a target finish time.
Heart Rate Zones Calculator
Calculate the five Karvonen training zones from your max heart rate and resting heart rate.
VO2 Max Calculator (Cooper Test)
Estimate VO2 max from a 12-minute all-out run. Includes age- and gender-adjusted fitness category.
Calorie Burn Calculator
Estimate calories burned for any activity using MET values and your bodyweight.
Women's Health
Cycle, ovulation, and fertility-window predictions powered by simple, transparent math.
General Health
Resting metabolism, ideal weight ranges, and risk indicators for everyday wellness.
BMR Calculator
Calculate your basal metabolic rate, the calories your body burns at complete rest.
Ideal Body Weight Calculator
See your ideal weight range from four classic formulas: Hamwi, Robinson, Miller, and Devine.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and see the WHO cardiovascular risk category.
Numbers are a starting point. A program is the finish line.
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