27 free tools
Health calculators
Estimate useful wellness targets with simple, transparent formulas. Every tool includes its formula, an example, and instant private results.
BMI Calculator
Calculate adult body mass index and its standard weight-status category from height and weight.
Open calculatorCalorie Calculator
Estimate daily calorie needs from age, sex, height, weight, and activity level using the Mifflin–St Jeor equation.
Open calculatorBody Fat Calculator
Estimate body fat percentage with the U.S. Navy circumference method.
Open calculatorIdeal Weight Calculator
Estimate an adult reference weight range from height using the Devine formula and healthy BMI bounds.
Open calculatorWater Intake Calculator
Estimate a practical daily water target based on body weight and exercise time.
Open calculatorBMR Calculator
Calculate bmr with clear inputs, instant results, and transparent assumptions.
Open calculatorTDEE Calculator
Calculate tdee with clear inputs, instant results, and transparent assumptions.
Open calculatorLean Body Mass Calculator
Calculate lean body mass with clear inputs, instant results, and transparent assumptions.
Open calculatorBody Surface Area Calculator
Calculate body surface area with clear inputs, instant results, and transparent assumptions.
Open calculatorWaist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio with clear inputs, instant results, and transparent assumptions.
Open calculatorProtein Intake Calculator
Calculate protein intake with clear inputs, instant results, and transparent assumptions.
Open calculatorCarb Intake Calculator
Calculate carb intake with clear inputs, instant results, and transparent assumptions.
Open calculatorFat Intake Calculator
Calculate fat intake with clear inputs, instant results, and transparent assumptions.
Open calculatorMacro Calculator
Calculate macro with clear inputs, instant results, and transparent assumptions.
Open calculatorPregnancy Due Date Calculator
Calculate pregnancy due date with clear inputs, instant results, and transparent assumptions.
Open calculatorOvulation Calculator
Calculate ovulation with clear inputs, instant results, and transparent assumptions.
Open calculatorPregnancy Weight Gain Calculator
Calculate pregnancy weight gain with clear inputs, instant results, and transparent assumptions.
Open calculatorBlood Alcohol Calculator
Calculate blood alcohol with clear inputs, instant results, and transparent assumptions.
Open calculatorBAC Time Calculator
Calculate bac time with clear inputs, instant results, and transparent assumptions.
Open calculatorHeart Rate Calculator
Calculate heart rate with clear inputs, instant results, and transparent assumptions.
Open calculatorTarget Heart Rate Calculator
Calculate target heart rate with clear inputs, instant results, and transparent assumptions.
Open calculatorOne Rep Max Calculator
Calculate one rep max with clear inputs, instant results, and transparent assumptions.
Open calculatorRunning Calories Calculator
Calculate running calories with clear inputs, instant results, and transparent assumptions.
Open calculatorWalking Calories Calculator
Calculate walking calories with clear inputs, instant results, and transparent assumptions.
Open calculatorCycling Calories Calculator
Calculate cycling calories with clear inputs, instant results, and transparent assumptions.
Open calculatorSwimming Calories Calculator
Calculate swimming calories with clear inputs, instant results, and transparent assumptions.
Open calculatorSleep Calculator
Calculate sleep with clear inputs, instant results, and transparent assumptions.
Open calculatorAbout our health calculators
CalculatorDepot tools are designed for quick estimates and learning. Inputs stay in your browser, and each page describes the equation behind its result. Check important decisions with a qualified professional when individual circumstances, regulations, or fees matter.