Category / 21 tools
Health & Fitness calculators
BMI, calories, body fat, and daily targets.
Calorie Deficit Calculator
How long a daily calorie deficit takes to hit a weight-loss goal.
Lean Body Mass Calculator
Estimate lean body mass and body-fat weight (Boer formula).
BMI Calculator
Body Mass Index from your height and weight.
BMR / Calorie Calculator
Daily calories burned at rest (Mifflin-St Jeor).
Body Fat Calculator
Estimate body-fat percentage (U.S. Navy method).
Ideal Weight Calculator
A healthy target weight for your height (Devine formula).
Water Intake Calculator
How much water to drink per day by weight and activity.
Calories Burned Calculator
Calories burned for an activity by weight and duration.
TDEE / Macro Calculator
Daily calories and a protein/carb/fat split for your goal.
Protein Intake Calculator
Daily protein target by body weight and training goal.
One-Rep Max Calculator
Estimate your 1-rep max from a weight and reps performed.
Running Pace Calculator
Your pace per mile and per kilometer from time and distance.
Heart Rate Zone Calculator
Your max heart rate and training zones by age.
Pregnancy Due Date Calculator
Estimated due date from your last menstrual period (Naegele).
Ovulation Calculator
Your estimated ovulation day and fertile window.
Blood Alcohol (BAC) Calculator
Estimated blood alcohol content from drinks, weight, and time.
Macro Calculator
Split your daily calories into protein, carbs, and fat grams.
Waist-to-Hip Ratio Calculator
A quick body-shape health marker from two tape measurements.
Smoking Cost Calculator
What a cigarette habit costs you per day, year, and decade.
Blood Pressure Category Calculator
Classify a reading using the standard AHA blood-pressure stages.
Daily Habit Savings Calculator
Turn a daily spend (coffee, snack, soda) into yearly and 5-year totals.