🏃 Fitness & Health Calculators
Calculate BMI, calories, body fat, heart rate, macros, and more for your health and fitness goals.
44 free calculators
Reaching your health and fitness goals starts with understanding your numbers. Our comprehensive suite of fitness and health calculators gives you evidence-based insights into your body composition, nutritional needs, cardiovascular fitness, and recovery -- all for free, with no account required.
Understand Your Body Composition
Start with the basics: the BMI Calculator provides a quick snapshot of whether your weight is in a healthy range for your height. For a deeper picture, the Body Fat Calculator uses the U.S. Navy circumference method to estimate fat percentage from simple tape measurements. The Lean Body Mass Calculator shows you exactly how much metabolically active tissue you're carrying -- crucial for calibrating protein intake and strength targets.
Nail Your Nutrition
The BMR Calculator and TDEE Calculator form the foundation of any successful diet plan. Once you know your maintenance calories, the Calorie Deficit Calculator maps out a path to your goal weight on your timeline. For more granular control, the Macro Calculator breaks your daily calories into protein, carbs, and fat targets -- and the Protein Intake Calculator ensures you're eating enough to preserve or build muscle while in a deficit. Keto enthusiasts can use the dedicated Keto Calculator to dial in their fat-forward macro split.
Optimise Training and Recovery
The Heart Rate Zone Calculator and Target Heart Rate Calculator use both the Karvonen formula and the age-based formula to set precise cardio intensity zones. Strength athletes can track progress with the One Rep Max Calculator (Epley formula) and plan between-session rest with the Recovery Time Calculator. Complete your wellness picture with tools for sleep cycle optimisation, daily hydration, and specialised calorie calculators for swimming, cycling, and walking.
⭐ Most Popular Health Tools
- BMI CalculatorCalculate your Body Mass Index (BMI) instantly. Enter your height and weight to
- Calorie CalculatorCalculate your daily calorie needs based on age, gender, weight, height, and act
- Running Pace CalculatorCalculate your running pace per km or mile. Enter distance and time to get your
- Body Fat CalculatorEstimate your body fat percentage using the U.S. Navy method. Enter your measure
- Ideal Weight CalculatorFind your ideal body weight using multiple formulas (Devine, Robinson, Miller, H
- Heart Rate Zone CalculatorCalculate your target heart rate zones for training. Based on your age and resti
- Pregnancy Due Date CalculatorCalculate your estimated due date based on the first day of your last menstrual
- Water Intake CalculatorCalculate how much water you should drink daily based on your weight and activit
- One Rep Max CalculatorCalculate your estimated one-rep max (1RM) for any lift using the Epley formula.
- Protein Intake CalculatorCalculate how much protein you need daily based on your weight, goal, and activi
- BMR CalculatorCalculate your Basal Metabolic Rate (BMR) to find how many calories your body bu
- TDEE CalculatorCalculate your Total Daily Energy Expenditure based on activity level.
- Macro CalculatorCalculate your daily macronutrient needs (protein, carbs, fat) based on your goa
- Blood Alcohol CalculatorEstimate your Blood Alcohol Concentration (BAC) based on drinks, weight, and tim
- Sleep CalculatorFind the best time to sleep or wake up based on sleep cycles of 90 minutes.
- Steps to Calories CalculatorEstimate calories burned from walking based on steps, weight, and pace.
- Ovulation CalculatorEstimate your most fertile days and ovulation date based on your menstrual cycle
- Waist to Hip Ratio CalculatorCalculate your waist-to-hip ratio to assess health risk related to body fat dist
- Lean Body Mass CalculatorCalculate your lean body mass (total weight minus body fat).
- Blood Pressure CalculatorCheck your blood pressure reading and understand what your systolic and diastoli
- Due Date CalculatorCalculate your estimated due date based on your last menstrual period or concept
- Pregnancy Weight Gain CalculatorCalculate recommended weight gain during pregnancy based on your pre-pregnancy B
- Period CalculatorPredict your next period date based on your last menstrual period and average cy
- Keto CalculatorCalculate your ideal keto macros. Enter your daily calories to get fat, protein,
- Calorie Deficit CalculatorCalculate the daily calorie deficit needed to reach your goal weight in your tar
- Blood Alcohol CalculatorCalculate your Blood Alcohol Content (BAC) based on drinks consumed, body weight
- Pregnancy Week CalculatorFind out exactly how many weeks pregnant you are based on your last menstrual pe
- Baby Weight Percentile CalculatorFind your baby's weight percentile based on age and gender using WHO growth stan
- Running Pace ConverterConvert running pace between min/km and min/mile instantly. Calculate your race
- Swimming Calorie CalculatorCalculate calories burned swimming based on your weight, swimming stroke, and du
- Cycling Calorie CalculatorCalculate calories burned cycling based on your weight, speed, and duration. Wor
- Walking Calorie CalculatorCalculate calories burned walking based on your weight, pace, and duration. Incl
- Push-Up Calorie CalculatorCalculate calories burned doing push-ups based on your weight, number of reps, a
- Yoga Calorie CalculatorCalculate calories burned during yoga based on your weight, yoga style, and sess
- Sleep Debt CalculatorCalculate your accumulated sleep debt based on your recommended sleep need versu
- Vitamin D CalculatorEstimate your daily vitamin D needs based on age, skin tone, and sun exposure. F
- Daily Fiber CalculatorCalculate your recommended daily fiber intake based on age, sex, and calorie nee
- Sodium Intake CalculatorCalculate your daily sodium intake and compare it to recommended limits. Learn h
- Iron Intake CalculatorCalculate your recommended daily iron intake based on age, sex, and whether you'
- Alcohol Unit CalculatorCalculate alcohol units in your drinks based on volume and ABV. Track weekly int
- Body Surface Area CalculatorCalculate your Body Surface Area (BSA) using the Mosteller, DuBois, or Haycock f
- Adjusted Body Weight CalculatorCalculate Adjusted Body Weight (AdjBW) for obese patients. Used in clinical sett
- Target Heart Rate CalculatorCalculate your target heart rate zones for fat burning, cardio fitness, and peak
- Exercise Recovery Time CalculatorEstimate how long you need to recover between workouts based on exercise intensi