Health Calculators
Free health calculators for BMI, calories, body fat, calories burned, period, ovulation, pregnancy, BAC, macros, one-rep max, sleep, pace, protein, conception, and A1C. Results stay in your browser.
BMI Calculator
Calculate your Body Mass Index and understand your weight category instantly.
Calorie Calculator
BMR, TDEE, calorie deficit and surplus for weight loss or gain. Daily targets by activity level.
Body Fat Calculator
Estimate your body fat percentage using various measurements and health formulas.
Calories Burned
Estimate calories burned during exercises and activities based on your profile.
Period Calculator
Track your cycle and accurately estimate your next period date using your history.
Ovulation Calculator
Predict your fertility window and peak ovulation dates based on your cycle history.
Pregnancy Calculator
Calculate your due date, track milestones, and view a timeline for your journey.
BAC Calculator
Widmark estimate from drinks, strength, volume, weight, sex, and hours. Not a breath test.
Macro Calculator
Split a calorie intake you already have into protein, carbs, and fat. You pick the percents.
One Rep Max Calculator
Epley and Brzycki estimates from a weight and 1–10 reps. Both shown.
Sleep Calculator
NSF hours by age, then a labeled 90-minute cycle grid.
Pace Calculator
Minutes per mile, or a race time for 5K, 10K, half, marathon, or custom.
Protein Calculator
Daily grams from body weight and a g/kg multiplier you can see.
Conception Calculator
A six-day conception window counted back from a due date or last period.
A1C Calculator
ADAG conversion between A1C and estimated average glucose. No label and no dose.