Fitness Calculators – Free Health & Fitness Tools

Every Calculator You Need

Organised by category. Click any card to open the calculator and get your result instantly.

Calculate your Body Mass Index based on height and weight. Understand where you stand on the healthy weight spectrum.

Estimate your body fat percentage using measurements. Track changes in body composition over time accurately.

Find your estimated due date and track pregnancy milestones from the first day of your last menstrual period.

Determine your daily calorie needs based on age, weight, height, and activity level for weight loss or maintenance.

Find your optimal training heart rate zones for fat burning, cardio, and peak performance during workouts.

Predict your fertile window and most likely ovulation date based on your cycle length to plan or prevent pregnancy.

Understand your blood pressure readings and what they mean for your cardiovascular health and risk level.

Calculate your optimal daily protein intake based on your fitness goals — muscle gain or fat loss or maintenance.

Find the best bedtime or wake-up time based on sleep cycles to wake up feeling refreshed and energised.

Discover how much water you should drink daily based on your weight, activity level, and climate you live in.

Convert your eyeglass prescription into an estimated contact lens power using accurate vertex distance calculations with our free online calculator.