Sports & Fitness Calculators
Calculate running pace, calories burned, BMI, body fat, heart rate zones, VO2 max, one-rep max, and more. All tools run client-side in your browser — nothing is sent to any server.
Running Pace Calculator
Calculate running pace in min/km or min/mi, speed, and predict finish times for 5K, 10K, half marathon, and marathon.
Calories Burned Calculator
Estimate calories burned during running, walking, cycling, swimming, HIIT, and 12+ activities using MET values.
BMI Calculator
Calculate Body Mass Index with health category, healthy weight range, and BMI Prime. Supports metric and imperial units.
Body Fat Estimator
Estimate body fat percentage using the US Navy circumference method. Shows fat mass, lean mass, and fitness category.
Ideal Weight Calculator
Find your ideal weight range using Devine, Robinson, Miller, and Hamwi formulas with body frame adjustment.
Heart Rate Zone Calculator
Calculate your five training heart rate zones using Max HR or Karvonen method. Find zones for fat burn and endurance.
VO2 Max Estimator
Estimate your VO2 max using Cooper Test, 1.5 Mile Run, or Rockport Walk Test. Get fitness rating by age and gender.
Race Finish Time Predictor
Predict finish times for 5K, 10K, 15K, half marathon, and marathon using the Riegel formula from a known race result.
Split Time Calculator
Generate even-split pacing tables for any race distance with cumulative time and pace per segment.
One Rep Max (1RM) Calculator
Estimate your one-rep max using Epley, Brzycki, Lombardi, and O'Conner formulas. Get training weight percentages.
Marathon Wall Predictor
Predict if and where you will hit the wall during a marathon. Analyzes glycogen, pace, training, and carb loading.
Cricket Run Rate Calculator
Calculate required run rate, projected score, and chase difficulty for ODI, T20, and custom cricket formats.