Health calculators
Understand your numbers, explore what changes them, and find a starting point that works for you. Free to use, no signup needed.
Ideal weight calculator
Estimate ideal weight and a BMI-based range from height and sex.
Explore calculatorBMI calculator
Calculate body mass index from your height and weight.
Explore calculator
Intermittent fasting calculator
Turn a fasting duration into a practical eating schedule.
Explore calculator
Calorie deficit calculator
Estimate maintenance and target calories for a chosen deficit.
Explore calculator
Body fat percentage calculator
Estimate body-fat percentage from body measurements.
Explore calculatorBody shape calculator
Estimate body shape from waist, hip, and bust measurements.
Explore calculator
Water intake calculator
Estimate a daily water range, bottle count, and simple hydration schedule.
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Weight loss percentage calculator
See the percent of starting weight lost, progress to a goal, and the 5 and 10 percent marks.
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Barbell plate calculator
Type a weight and see the plates for each side, largest first, for any bar and rack.
Explore calculatorFat intake calculator
Estimate a daily dietary-fat range from body inputs, activity, and goal.
Explore calculator
Protein calculator
A daily protein range in grams from your weight and goal, with a per-meal split.
Explore calculatorA starting point, with context.
Estimates can help you understand a pattern or plan your next step. They do not capture your whole health. Each calculator explains its assumptions so you can put the result in perspective.