Running Calorie Calculator

The standard formula uses METs (Metabolic Equivalent of Task): Calories = MET × weight in kg × duration in hours. The MET value varies with running speed — faster running has a higher MET, meaning more calories burned per minute. This calculator assigns MET values based on your pace and adjusts for optional factors like elevation and load.

Yes, significantly. Uphill running requires your muscles to do extra work against gravity. The additional energy cost is calculated using the elevation gain, your body weight, and a correction factor. The steeper and longer the climb, the greater the calorie bonus compared to flat running at the same pace.

Carrying extra weight increases the effective load your body must move, which raises your energy expenditure. The calculator adds the backpack weight to your body weight when computing the MET-based calorie total, giving you a more accurate estimate for trail runs or loaded training sessions.

Research suggests that runners over 60 tend to have a slightly lower metabolic efficiency and reduced muscle mass, which can result in marginally fewer calories burned at the same running intensity. The calculator applies a small correction factor for runners aged 60 and over to reflect this.

MET stands for Metabolic Equivalent of Task — a measure of exercise intensity relative to rest. A MET of 1 equals resting energy expenditure. Slow jogging (around 8 min/km) has a MET of roughly 6, while fast running (under 4 min/km) can reach a MET of 14 or higher. Multiplying MET by weight and time gives calories burned.

Treadmill running at the same pace burns slightly fewer calories because the belt assists leg turnover and there is no air resistance. Outdoors, wind resistance and terrain variation add to your effort. As a rough guide, setting a 1% incline on a treadmill approximates flat outdoor running energy cost.

Fat contains roughly 7,700 kcal per kilogram (3,500 kcal per pound). Dividing your total calories burned by these figures gives an estimate of fat mass lost. Keep in mind that the body also burns glycogen (carbohydrates) during running, especially at higher intensities, so not all calories come from fat directly.

Both matter, but in different ways. For a fixed distance, a heavier person burns more calories regardless of speed. However, faster running has a higher MET, so it burns more calories per minute — meaning if you run faster for the same duration, you burn more total calories. Over a fixed distance, the effect of speed is less pronounced because you finish sooner.