Health calculators
9 calculators in this category.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units. See what the number means and where you land on the WHO scale.
TDEE Calculator (BMR + Calorie Needs)
Calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor equation. Get calorie targets for cutting, maintenance, and bulking.
Water Intake Calculator
Estimate your daily water needs based on weight, activity level, and climate. Get the answer in liters, ounces, and glasses.
Pregnancy Due Date Calculator
Calculate your estimated due date from last period, conception, or IVF transfer. See current week, trimester, and days remaining.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method — just a tape measure. Get your category, fat mass, and lean mass.
Macro Calculator
Split your daily calories into protein, carbs, and fat based on your goal and body weight. Evidence-based ratios for cutting, maintenance, or bulking.
1RM (One-Rep Max) Calculator
Estimate your one-rep max from any weight and rep count. See training percentages for strength, hypertrophy, and volume.
Ovulation Calculator
Predict ovulation day, fertile window, next period, and earliest pregnancy test date based on your cycle.
Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles. Wake feeling rested, not groggy.