Health & Fitness
BMI, calories, body metrics and training calculators — for guidance, not diagnosis.
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Body Fat Calculator
Estimate body fat percentage using the US Navy method.
Ideal Weight Calculator
Estimate ideal body weight using the Devine formula.
One Rep Max Calculator
Estimate your 1RM from weight and reps (Epley formula).
Target Heart Rate Calculator
Find your training heart-rate zones from your age.
Macro Calculator
Split your daily calories into protein, carbs and fat.
Pregnancy Due Date Calculator
Estimate your due date from the first day of your last period.
Lean Body Mass Calculator
Estimate lean body mass using the Boer formula.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and health category.
Waist-to-Height Ratio Calculator
A quick health indicator from waist and height.
Calories Burned Calculator
Estimate calories burned during an activity using MET values.
TDEE Calculator
Calculate your total daily energy expenditure.
Blood Alcohol Content (BAC) Calculator
Estimate blood alcohol content from drinks.
Creatinine Clearance (GFR) Calculator
Estimate kidney function with the Cockcroft-Gault formula.
A1C to Glucose Calculator
Convert HbA1c to estimated average glucose.
Glucose to A1C Calculator
Convert average glucose to estimated HbA1c.
Karvonen Heart Rate Calculator
Find target heart rate using heart rate reserve.
Wilks Score Calculator
Calculate a powerlifting Wilks score.
Calorie Deficit Calculator
Find the daily calorie deficit to reach a goal weight.
Sweat Rate Calculator
Calculate your hourly sweat rate for hydration.
Heart Rate Zones Calculator
Calculate your five training heart rate zones.
BMR Calculator (Mifflin-St Jeor)
Calculate basal metabolic rate with the Mifflin-St Jeor equation.
Macros by Percentage Calculator
Split daily calories into macro grams.
Daily Fiber Intake Calculator
Find your recommended daily fiber intake.
Resting Metabolic Rate (RMR) Calculator
Estimate your resting metabolic rate.
Body Adiposity Index (BAI) Calculator
Estimate body fat with the Body Adiposity Index.
Corrected Calcium Calculator
Calculate albumin-corrected serum calcium.
Mean Arterial Pressure (MAP) Calculator
Calculate mean arterial pressure.
Pack-Years Calculator
Calculate smoking pack-years.
Ideal Body Weight (Devine) Calculator
Estimate ideal body weight with the Devine formula.
Lean Body Mass (Boer) Calculator
Estimate lean body mass with the Boer formula.
Army Body Fat Calculator
Estimate body fat with the U.S. Army circumference method.
Navy Body Fat Calculator
Estimate body fat with the U.S. Navy method.
Total Body Water Calculator
Estimate total body water with the Watson formula.
Daily Sodium Intake Calculator
Check your sodium intake against the daily limit.
Daily Sugar Intake Calculator
Check added sugar against recommended limits.
Caffeine Half-Life Calculator
See how much caffeine remains in your system.
Estimated Blood Volume Calculator
Estimate blood volume with the Nadler formula.
Weight Loss Percentage Calculator
Calculate the percentage of body weight you have lost.
Adjusted Body Weight Calculator
Calculate adjusted body weight for dosing.
Fat-Burning Heart Rate Calculator
Find your fat-burning heart rate zone.
Creatine Dosage Calculator
Calculate your creatine loading and maintenance dose.
1RM Percentage Calculator
Calculate training weights as a percent of your 1RM.
Protein Intake per Kg Calculator
Calculate daily protein from body weight and goal.
Daily Carb Calculator
Calculate your daily carbohydrate target.
Daily Fat Grams Calculator
Calculate your daily fat intake in grams.
Goal Calories Calculator
Find your calorie target for weight goals.
Body Recomposition Calorie Calculator
Get training-day and rest-day calorie targets.
Anaerobic Threshold Heart Rate Calculator
Estimate your anaerobic threshold heart rate zone.
Stair Climbing Calories Calculator
Estimate calories burned climbing stairs.
Dehydration Fluid Loss Calculator
Estimate fluid loss and dehydration percentage.
Cunningham BMR Calculator
Calculate BMR from lean body mass.
Owen BMR Calculator
Calculate BMR with the Owen equation.
Schofield BMR Calculator
Calculate BMR with the Schofield equation.
Body Water Percentage Calculator
Estimate your total body water.
Daily Cholesterol Limit Calculator
Check cholesterol intake against the daily limit.
Sodium to Salt Calculator
Convert sodium content to equivalent salt.
Alcohol Units Calculator
Calculate UK alcohol units in a drink.
Standard Drinks Calculator
Calculate US standard drinks in a beverage.
Weekly Weight Loss Calculator
Estimate weekly weight loss from a calorie deficit.
Goal Weight Date Calculator
Estimate when you’ll reach your goal weight.
Calories Per Meal Calculator
Split your daily calories across meals.
Resting Energy Expenditure Calculator
Estimate resting energy expenditure.
Daily Protein Calculator
Estimate your daily protein needs.
Ponderal Index Calculator
A height-adjusted body-mass metric (better than BMI for tall/short people).
BMI Prime Calculator
Your BMI relative to the upper healthy limit (25).
Smoking Cost Calculator
See how much smoking costs per month and year.
Alcohol Units Calculator
Calculate the units of alcohol in a drink.
Calories to Kilojoules
Convert between calories (kcal) and kilojoules.
Pregnancy Weeks to Months
Convert pregnancy weeks to months and trimester.
Caffeine Intake Calculator
Estimate your caffeine intake from drinks.
Weight Loss Calorie Calculator
Find the daily calorie deficit needed to reach a goal.
BMR (Katch-McArdle) Calculator
Estimate BMR from lean body mass.
Protein Per Meal Calculator
Split daily protein across meals.
Heart Rate Reserve (Karvonen) Calculator
Find training zones using the Karvonen method.
Steps to Miles Calculator
Convert step count into distance.
Steps to Calories Calculator
Estimate calories burned from step count.
Daily Sugar Limit Calculator
Find your recommended added-sugar limit.
Blood Pressure Category
Classify a blood pressure reading.
Pack-Year Calculator
Calculate smoking pack-years.
Child Height Predictor
Estimate a child’s adult height from the parents.
Daily Fiber Calculator
Find your recommended daily fiber intake.
Maximum Heart Rate Calculator
Estimate max heart rate (Tanaka formula).
Daily Fat Intake Calculator
Find your recommended daily fat intake.
Daily Carb Intake Calculator
Find your recommended daily carbohydrate intake.
Net Carbs Calculator
Calculate net carbs for a keto diet.
Cholesterol Ratio Calculator
Calculate your total-to-HDL cholesterol ratio.
Sleep Needs Calculator
Find the recommended hours of sleep for your age.
Body Frame Size Calculator
Estimate your body frame size from wrist and height.
Ovulation Calculator
Estimate your fertile window from your last period.
YMCA Body Fat Calculator
Estimate body fat using the YMCA formula.
Race Time Predictor
Predict a race time from a known result (Riegel).
Weight Loss Timeline Calculator
Estimate how long it takes to reach a goal weight.
FFMI Calculator
Calculate your fat-free mass index.
Wilks Score Calculator
Calculate a powerlifting Wilks score (male formula).
Saturated Fat Limit Calculator
Find your daily saturated fat limit.
Daily Sodium Limit
Find your recommended daily sodium limit.
Muscle Gain Protein Calculator
Find your protein target for building muscle.
Cooper VO₂ Max Calculator
Estimate VO₂ max from a 12-minute run.
Race Pace Calculator
Calculate the pace needed for a goal finish time.
Swim Pace Calculator
Calculate your swim pace per 100m.
Cycling Power-to-Weight Calculator
Calculate your cycling power-to-weight ratio.
BMR (Harris-Benedict) Calculator
Estimate BMR using the Harris-Benedict equation.
Calories from Macros Calculator
Calculate total calories from protein, carbs and fat.
Alcohol Calories Calculator
Estimate the calories in an alcoholic drink.
Sweat Rate Calculator
Calculate your sweat rate during exercise.