Fitness calculators
BMI, calories, protein, water, pace, and sleep cycles. Not medical advice.
Fitness tools are screening numbers, not a diagnosis. BMI from height and weight, a calorie estimate from age and activity, a protein gram target, a water target, running pace, and 90-minute sleep cycles. Muscle, bone density, pregnancy, and some medicines make BMI a poor fit. Talk to a clinician before you change diet or training because of a webpage.
Running Pace Calculator
Calculate running pace, finish time, or distance from the other two.
BMI Calculator
Calculate body mass index from height and weight in metric or US units.
Calorie Calculator
Estimate daily calorie needs from age, sex, height, weight, and activity.
Sleep Cycle Calculator
Find bedtimes or wake times using 90-minute sleep cycles.
Protein Calculator
Estimate daily protein grams from body weight and a goal.
Water Intake Calculator
A simple daily water target from body weight.