Ready
TDEE Calculator
Estimate total daily energy expenditure from a shared BMR method and editable activity multiplier.
Open calculatorHealth Calculators
Understand everyday health measurements and wellness indicators.
Educational health estimates
29 calculators
/
Calories and Energy
Ready
Calorie Deficit Calculator
Compare entered energy intake with TDEE or estimate intake from a user-entered deficit.
Open calculatorReady
Maintenance Calorie Calculator
Estimate adult maintenance energy while keeping BMR and activity-adjusted energy distinct.
Open calculatorReady
Weight Loss Calculator
Model a user-entered weight-loss goal, timeline, and theoretical energy difference without promising change.
Open calculatorReady
Weight Gain Calculator
Model a user-entered weight-gain goal, timeline, and theoretical calorie surplus.
Open calculatorReady
BMR Calculator
Estimate adult basal metabolic rate using the Mifflin–St Jeor equation.
Open calculatorReady
Calorie Calculator
Estimate adult daily maintenance calories from BMR and activity level.
Open calculatorMacronutrients
Ready
Macro Calculator
Reconcile protein, carbohydrate, and fat targets by percentage or grams.
Open calculatorReady
Protein Intake Calculator
Convert an editable grams-per-weight protein target into daily, calorie, and per-meal estimates.
Open calculatorReady
Carbohydrate Calculator
Convert carbohydrate calories and grams or reconcile remaining calories after protein and fat.
Open calculatorReady
Keto Macro Calculator
Calculate remaining fat from user-entered calorie, protein, and carbohydrate targets.
Open calculatorBody Composition
Ready
Weight Loss Percentage Calculator
Calculate neutral percentage weight change in either direction from a non-zero starting weight.
Open calculatorReady
Body Surface Area Calculator
Estimate body surface area with verified Mosteller and Du Bois equations.
Open calculatorReady
FFMI Calculator
Estimate fat-free mass index from height, weight, and an entered body-fat percentage.
Open calculatorReady
Lean Body Mass Calculator
Compare population-derived Boer and Hume lean-body-mass estimates.
Open calculatorReady
Army Body Fat Calculator
Estimate body-fat percentage with the U.S. Army 2023 one-site circumference equation.
Open calculatorReady
BMI Calculator
Calculate adult body mass index and a height-based reference weight range.
Open calculatorReady
Body Fat Calculator
Estimate body-fat percentage with the US Navy circumference method.
Open calculatorReady
Healthy Weight Reference Calculator
Compare four legacy weight-reference formulas and a BMI-based range.
Open calculatorBody Measurements
Ready
Bra Size Calculator
Estimate a starting band and cup reference across US, UK, and EU conventions.
Open calculatorReady
Body Shape Calculator
Compare shoulder, chest, waist, and hip ratios using transparent editable tolerance rules.
Open calculatorReady
Face Shape Calculator
Compare manual face measurements with transparent subjective styling conventions.
Open calculatorFitness
Ready
VO₂ Max Calculator
Estimate VO₂ max from a Cooper 12-minute run or Rockport one-mile walk field test.
Open calculatorReady
Steps to Miles Calculator
Convert steps and distance with a user-entered or clearly estimated stride length.
Open calculatorReady
Heart Rate Zone Calculator
Estimate moderate and vigorous exercise heart-rate ranges.
Open calculatorReady
Running Pace Calculator
Calculate running pace, time, distance, speed, and cumulative splits.
Open calculatorPregnancy and Cycle
Ready
Pregnancy Due Date Calculator
Estimate a pregnancy due date, gestational week, and trimester milestones.
Open calculatorReady
Ovulation Calculator
Estimate ovulation, fertile-window, and future cycle dates.
Open calculatorStatistical Reference
Ready
Life Expectancy Calculator
Look up average remaining years in the official U.S. Social Security period life table.
Open calculatorAbout health calculators
These calculators provide educational estimates, not diagnoses or medical advice. Individual needs and clinical circumstances can differ.