Calories Burned Biking Calculator
Enter your weight, ride duration, and cycling intensity to see how many calories you burned on the bike. The calculator works for road cycling, mountain biking, stationary bikes, and spinning classes. Switch between metric and imperial units, and see your result break down into an estimated weight-loss equivalent. Your numbers update as you type.
Formula
Worked example
A 155 lb (70 kg) rider cycling at moderate pace (12-14 mph, MET 8.0) for 45 minutes burns 8.0 x 70 x 0.75 = 420 kcal, equivalent to about 47 g of fat.
How the cycling calorie calculator works
The calculator uses the Metabolic Equivalent of Task (MET) method, the same approach used by exercise scientists and the American College of Sports Medicine. Each cycling intensity is assigned a MET value: a number that describes how much energy that activity demands relative to sitting quietly. The formula is simple - calories = MET x body weight in kg x duration in hours. Because heavier riders move more mass against gravity and air resistance, they burn proportionally more calories at the same speed, which is exactly what the formula captures. A MET of 8 (moderate cycling) means you burn 8 times as many calories per kilogram per hour as you would at rest. The MET values used here come from the 2011 Compendium of Physical Activities, the standard reference in exercise physiology.
What factors affect how many calories you burn cycling?
Body weight is the biggest single factor: a 200 lb rider burns roughly a third more than a 150 lb rider at identical speed and duration. Speed and intensity come next, with racing pace burning nearly four times as many calories as a gentle leisure ride. Terrain matters significantly - climbing at 10 mph demands far more effort than rolling flat roads at 15 mph, so the MET values here assume relatively flat ground. Wind, especially headwind, can raise your effort by 20-40% without changing your speed. Drafting behind another rider cuts your energy cost by 15-30%. Bike type and fit also play a role: an aggressive road position is more aerodynamic and efficient than a hybrid or mountain-bike posture. Finally, fitness level affects efficiency slightly - highly trained cyclists produce a given output at a lower physiological cost, meaning they may burn slightly fewer calories per km at the same power output.
Road cycling vs. mountain biking vs. stationary bikes
Road cycling at 12-14 mph (moderate MET 8.0) and mountain biking (MET 8.5) have similar calorie costs, but mountain biking involves more upper-body engagement, frequent braking and accelerating, and elevation change - all of which raise the real-world burn. Road racing at 16-19+ mph carries the highest outdoor MET (12-16), making it the most calorie-intensive option per hour. Stationary bikes (MET 6.8) burn fewer calories than an equivalent outdoor effort because there is no wind resistance, no balancing, and typically a smoother, more efficient pedal stroke. Spinning classes push intensity to MET 10.3 on average, bringing them close to vigorous outdoor cycling. If you use a heart-rate monitor or power meter (watts), those data points give you a more personalised estimate than MET alone.
Cycling for weight loss: what the numbers actually mean
A kilogram of body fat stores roughly 7,700 kcal (3,500 kcal per pound). To lose 0.5 kg per week from cycling alone, you need to burn an extra 550 kcal per day, which at moderate pace (560 kcal/hr for a 70 kg rider) means about 59 minutes of riding daily. In practice, most people combine a moderate calorie deficit with regular cycling - for example, a 300 kcal daily dietary reduction plus a 45-minute ride creates roughly a 550 kcal deficit without requiring either extreme. Longer rides (60-90 minutes) are particularly effective because prolonged aerobic work draws increasingly on fat as a fuel source once muscle glycogen is partially depleted. Post-ride recovery also matters: intense sessions can elevate calorie burn for 1-3 hours afterward through excess post-exercise oxygen consumption (EPOC), though this effect is modest for most cycling intensities.
MET values and calorie burn rates by cycling intensity
| Activity / speed | MET | kcal/hr (155 lb / 70 kg) |
|---|---|---|
| Leisure / commute (<10 mph) | 4.0 | 280 |
| Slow pace (10-12 mph) | 6.0 | 420 |
| Moderate (12-14 mph) | 8.0 | 560 |
| Fast / vigorous (14-16 mph) | 10.0 | 700 |
| Very fast (16-19 mph) | 12.0 | 840 |
| Racing (>19 mph, not drafting) | 16.0 | 1,120 |
| Mountain biking / BMX | 8.5 | 595 |
| Stationary bike, moderate | 6.8 | 476 |
| Spinning class / high-intensity | 10.3 | 721 |
MET values from the 2011 Compendium of Physical Activities. Burn rates shown for a 155 lb (70 kg) person.
Frequently asked questions
How many calories does a 30-minute bike ride burn?
It depends on your weight and pace. At a moderate pace (12-14 mph, MET 8.0), a 155 lb (70 kg) rider burns about 280 kcal in 30 minutes. At a faster pace (16-19 mph, MET 12), that same rider burns roughly 420 kcal in half an hour. Use the calculator above with your exact weight and duration for a personalised figure.
Is biking or running better for burning calories?
Running typically burns more calories per minute than moderate cycling, because it is a weight-bearing activity with no gliding phase. A 155 lb person running at 6 mph burns about 590 kcal/hr vs. about 560 kcal/hr cycling at moderate pace. However, cycling allows longer sessions with less joint stress, so total daily burn over a week can end up comparable or higher. For weight management, consistency matters more than which activity you choose.
Does cycling speed affect calorie burn more than duration?
Both matter, but speed has a non-linear effect because wind resistance grows with the square of speed. Doubling your speed more than doubles your energy cost. Going from leisure (4.0 MET) to racing pace (16.0 MET) quadruples calorie burn per hour. Duration scales linearly - twice the time, twice the calories at the same intensity. For maximising total burn per session, extending duration is usually more sustainable than dramatically increasing speed.
How accurate is the MET-based calorie estimate?
The MET formula is accurate within roughly 10-20% for most people under standard conditions. Individual variation in fitness, metabolism, bike type, terrain, wind, and body composition all create noise around the estimate. A heart-rate monitor or a bike power meter (measuring watts) will give you a more personalised number. The formula also does not account for EPOC (afterburn) or the effect of significant elevation gain, so real-world burn on hilly rides is often 10-30% higher than the flat-road estimate.
Does stationary biking burn the same calories as outdoor cycling?
Not quite. Stationary cycling lacks wind resistance, requires no balancing, and typically maintains a steadier cadence, all of which reduce energy expenditure. At an equivalent effort level, stationary biking burns roughly 15-25% fewer calories than outdoor road cycling. Spinning classes close much of that gap by using interval-style intensity, bringing their MET close to vigorous outdoor cycling.
Can I use this calculator for indoor cycling or a bike trainer?
Yes. Select "stationary bike, moderate" for a standard indoor ride or "spinning class / high-intensity stationary" for a vigorous trainer session or spin class. If your trainer or app reports power output in watts, a power-based formula (calories = watts x 3.6 x hours / 0.24) gives a more precise result - but the MET method is a solid approximation when power data is unavailable.