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Health & Fitness

Free health & fitness calculators — BMR, calorie, body fat, water intake, heart rate, pace, due dates, ovulation.

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All Health & Fitness (12)

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Alcohol Units Calculator

Calculate UK alcohol units across multiple drinks, see grams of ethanol, and compare against the 14-units-per-week low-risk guideline.

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Blood Alcohol Calculator

Estimate Blood Alcohol Concentration from drinks, weight, gender, and time.

Calories Burned

Calculate calories burned for any activity — running, cycling, yoga, gym.

Fitness Age Calculator

Estimate your fitness age from VO2 max relative to your chronological age.

Heart Rate Zones

Calculate training heart rate zones from age and resting heart rate.

Macro Calculator

Calculate daily protein, carbs, and fat targets from goals and activity level.

One Rep Max Calculator

Estimate your 1RM (one-rep max) from any working set using 7 formulas.

Ovulation Calculator

Estimate ovulation window and fertile days from menstrual cycle data.

Pregnancy Due Date

Calculate due date and trimester from last menstrual period or conception date.

Run Pace Calculator

Calculate pace, time, or distance — convert between min/km and min/mile.

VO2 Max Estimator

Estimate VO2 max from resting heart rate, age, and gender. Cooper test included.

Water Intake Calculator

Calculate daily water intake — weight, climate, and activity factored in.

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