Running Calorie Calculator

Running Calories Guide

How Running Burns Calories

The most accurate formula for running calorie expenditure uses oxygen consumption. At moderate running speeds, the net calorie cost is approximately 1 kcal per kg per km (often simplified as 0.63 kcal/lb/mile). For a 70 kg runner: ~70 kcal per km. This is remarkably consistent across speeds — running further burns more calories, but running faster does not burn proportionally more per km (only slightly more due to higher efficiency losses and EPOC). Walking the same distance burns approximately

Factors That Affect Calorie Burn

Body weight: heavier runners burn proportionally more per km. Speed: faster running increases calorie burn slightly per km due to inefficiency at high speeds, and significantly per minute. Terrain: trail running burns 10–20% more than road due to lateral stability work and varied surface. Elevation: climbing burns approximately 10 kcal per 100m of elevation gain per 10 kg of body weight. Treadmill at 0% incline burns approximately 10% fewer calories than outdoor running at the same pace (no wind

Running for Weight Loss

Running is one of the most effective calorie-burning exercises. A 70 kg runner burns approximately 350 kcal per 5km run. To lose 0.5 kg per week requires a 500 kcal/day deficit. Three 5km runs per week provides 1050 kcal of deficit — enough for approximately 150g of fat loss per week from exercise alone. Combining running with a modest dietary adjustment (300 kcal/day reduction) is generally more sustainable and effective than either approach alone. Running increases appetite — tracking actual i

EPOC — The Afterburn Effect

Excess Post-exercise Oxygen Consumption (EPOC) is the elevated calorie burn in the hours after running, as the body restores oxygen levels, processes lactate, and repairs muscle. For easy-moderate runs, EPOC adds approximately 6–10% to total calorie burn. For high-intensity interval running or races, EPOC can add 10–15% and last 24–48 hours. The afterburn effect is real but often exaggerated in marketing — it adds perhaps 30–50 extra kcal after a typical easy run, not hundreds.