❤️ Health & Fitness
Health & Fitness Calculators
BMI, BMR, calories, body fat, macros, and pregnancy tools.
30 tools in this category
Showing 30 of 30
- BMI CalculatorBody Mass Index from height and weight with category guidance.
- BMR CalculatorBasal Metabolic Rate using the Mifflin–St Jeor equation.
- Calorie / TDEE CalculatorTotal Daily Energy Expenditure from BMR and activity level.
- Body Fat (U.S. Navy)Estimate body fat percentage using the U.S. Navy circumference method.
- Ideal Weight CalculatorRobinson formula ideal body weight estimate from height and sex.
- Pregnancy Due DateEstimate due date from last menstrual period (Naegele’s rule, +280 days).
- Macro CalculatorSplit daily calories into protein, carbs, and fat grams.
- Running Pace CalculatorConvert distance and time into pace per km/mile and estimated speed.
- Water Intake CalculatorEstimate daily water needs from body weight and activity minutes.
- Pregnancy Weight Gain EstimateIOM-style total pregnancy weight-gain ranges by pre-pregnancy BMI category.
- Waist–Hip RatioWaist-to-hip ratio with a simple risk band hint.
- Steps to Miles & CaloriesConvert step count to distance and estimate calories burned.
- Heart Rate Zones CalculatorKarvonen-style training zones from age and resting heart rate.
- Sleep Cycle CalculatorSuggested bedtimes based on 90-minute sleep cycles before a wake time.
- Protein Need CalculatorEstimate daily protein grams from body weight and goal.
- Body Surface Area (Mosteller)Estimate BSA using the Mosteller formula.
- Pregnancy Week TrackerEstimate current pregnancy week, day, and trimester from LMP.
- Ideal Body Weight (Multiple Formulas)Compare Robinson, Devine, and Miller ideal body weight estimates.
- Calories Burned (MET)Estimate calories burned from MET value, weight, and duration.
- Pace ↔ Speed ConverterConvert running/walking pace (min/km or min/mi) to speed.
- BAC Rough Estimate (Widmark)Very rough blood-alcohol estimate. NOT legal advice — never drink and drive.
- Target Heart Rate CalculatorSimple % of max heart-rate training targets from age.
- One-Rep Max CalculatorEstimate 1RM from weight lifted and reps (Epley or Brzycki).
- VO₂ Max EstimateRough VO₂ max from Cooper 12-min run distance (educational).
- Macros by GoalProtein, fat, and carbs from TDEE and lose / maintain / gain goal.
- Pregnancy Weight by WeekIOM-style cumulative weight range by week and pre-pregnancy BMI category.
- Blood Pressure CategoryGeneral ACC/AHA-style category labels from systolic and diastolic readings.
- Intermittent Fasting WindowEating and fasting window lengths for common IF schedules.
- Body Recomp CaloriesMild deficit calories for body recomposition from TDEE.
- Running Cadence EstimatorSteps per minute from pace and estimated step length.