Fitness Calculators

Training questions tend to come down to two numbers: how fast you move and how hard your heart works. The calculators in this category answer both. One takes a recent time over a known distance and gives your pace per kilometer or mile, a finish-time prediction for the standard race distances, a calorie estimate from your body weight and an adjustment for elevation gain. The other estimates your max heart rate from your age with four published formulas, or takes a value you have measured, and divides it into heart rate zones on Olympiatoppen's intensity scale. Enter what you know and read off the rest.