Calculate your ideal weight using the Broca, Devine, and Hamwi methods—plus your target weight based on your body fat percentage. Our calculator will show you a realistic goal.
29 September 2026
Calculate your training heart rate in seconds: Using your age and resting heart rate, our calculator determines your 5 heart rate zones—for effective endurance training.
24 September 2026
Convert Treadmill Incline: Our calculator uses your speed and incline to show you the equivalent pace on a flat surface, the MET value, and the calories burned.
18 September 2026
Calculate your fluid needs based on your body weight, age, exercise duration, and climate—including sweat rate, weighing yourself, and distribution throughout the day.
6 September 2026
Calculate Your Sleep Needs: Based on your wake-up time, chronotype, and training load, our calculator shows you the optimal bedtime in full sleep cycles.
14 August 2026
Determine your body fat percentage without a caliper: Our calculator uses the U.S. Navy formula and the YMCA formula to show you your fat mass, fat-free mass, and classification.
10 August 2026
Calculate your calorie needs: the TDEE calculator combines basal metabolic rate, daily activity and training volume into your total expenditure and shows target calories for losing, holding or building.
27 July 2026
Calculate waist-to-height ratio and waist-to-hip ratio: Our calculator displays WHtR, WHR, and waist circumference, along with a traffic-light system indicating your risk of abdominal fat.
16 July 2026
Determine Your Body Type: Based on your bust, waist, and hip measurements, our calculator determines your body type and provides personalized exercise and nutrition recommendations.
22 June 2026
Estimate VO₂max without a lab: Our calculator uses the Cooper test, 1-km time, or watts and heart rate on an ergometer, and adjusts the value based on age and gender.
4 June 2026
Calculate your pace and plan your splits: Based on your target time or desired pace, our calculator generates a kilometer chart for 5 km, 10 km, the half marathon, and the marathon.
25 May 2026
Predict your race time: The Riegel Calculator projects your result across all distances from 5 km to a marathon—using an exponent that matches your training volume.
15 May 2026