Article — Calories Burned Biking Calculator
Calories burned biking: a practical guide with MET values
Calories burned biking depend on body weight, time, and intensity, and follow a simple formula: kilocalories equals MET multiplied by kilograms multiplied by hours. A 70 kg rider doing 60 minutes of moderate cycling at 12-14 mph (6.8 MET) burns about 476 kcal. The MET values come from the Compendium of Physical Activities published by Ainsworth and colleagues, the same reference used by the American College of Sports Medicine and most fitness trackers. The calculator above runs the equation for nine intensity tiers from leisure to competitive racing.
The result is an estimate, not a measurement. Population-average MET values match real-world energy cost within 15 to 25 percent for most adults, with the biggest variance coming from individual cycling efficiency, headwind, and grade. A power meter on the bike is the only way to nail it precisely.
How the calories burned biking formula works
The MET method dates from physiology research in the 1960s and was published as a public reference compendium by Ainsworth in 1993, with major updates in 2000, 2011, and 2024. One MET is the rate of energy expenditure at rest, defined as roughly 1 kcal per kilogram per hour, or equivalently 3.5 ml of oxygen per kg per minute. Biking at 6.8 MET means burning 6.8 times the resting rate, which works out to 6.8 kcal per kilogram per hour.
To get total calories, multiply MET by body weight in kilograms by time in hours. For a 70 kg rider at 6.8 MET for 45 minutes: 6.8 times 70 times 0.75 equals 357 kcal. The calculator does this in the background and shows the equation in the formula bar below the result.
kcal = MET × kg × hoursper minute: kcal/min = (MET × 3.5 × kg) / 200energy in kJ: kJ = kcal × 4.184Cycling MET values by pace
The Compendium assigns different MET values to cycling by speed and effort. Leisure pace under 10 mph is 4.0 MET. Light effort at 10-12 mph is 6.0 MET. Moderate at 12-14 mph is 6.8 MET. Brisk at 14-16 mph is 8.0 MET. Vigorous racing at 16-19 mph reaches 10.0 MET, and fast competitive racing above 20 mph hits 12.0 MET. Mountain biking on mixed terrain averages 8.5 MET despite slower speeds, because the terrain demands constant power adjustments.
Stationary cycling is rated by effort or wattage. Light effort (50-100 W) is around 3.5 MET, moderate (100-150 W) is 7.0 MET, and vigorous (200+ W) reaches 10.5-12.0 MET. For trained athletes at sustained 250-300 W, calories burned biking on a smart trainer can exceed 1,000 kcal per hour, though most riders cannot hold that power for more than 30-60 minutes.
Lance Armstrong's reported sustained power during his Tour de France years was around 470 W for hour-long climbs, which corresponds to roughly 20-22 MET for a 70 kg athlete. That puts hourly calories burned biking at his peak above 1,500 kcal. Most amateur cyclists sustain 150-200 W, or about 7-10 MET, for the same hour.
Calories burned biking by body weight
Body weight scales calories burned biking linearly. Double the weight, double the calories at the same MET. A 50 kg rider at 6.8 MET for one hour burns 340 kcal. A 70 kg rider burns 476 kcal. A 90 kg rider burns 612 kcal. The ratio is exactly 50:70:90, or about 1:1.4:1.8.
That linear scaling is why heavier riders see bigger calorie numbers but not necessarily better fitness adaptation. Energy cost per pound (or per kilogram) of body mass is roughly the same across riders at the same MET. The reason heavier riders burn more total calories is that they move more mass against gravity, wind, and rolling resistance, which actually shows up in the road power required to maintain the same speed.
- 1 MET = 1 kcal/kg/h at rest
- Moderate biking = 6.8 MET (12-14 mph)
- Vigorous racing = 10-12 MET (16-20 mph)
- 1 pound of fat = roughly 3,500 kcal
- Cycling efficiency = 22-25% (the rest becomes heat)
- Average watts (adult, moderate) = 100-150 W
- Elite TT power = 350-450 W sustained
Hills, headwind, and real-world burn
The flat-road MET values assume calm air and a paved surface. Grade and wind change the picture dramatically. A 5 percent climb roughly doubles MET; 10 percent climbs at 8 mph can hit 12-14 MET, similar to road racing on flat ground. A 15 mph headwind against a 12 mph rider raises drag substantially and bumps MET by 30-50 percent.
To capture grade and wind in this calculator, pick an intensity tier one or two steps higher than your perceived effort. Or, if you have a power meter, log the average watts and use the power-to-MET approximation: MET equals 1.43 times watts divided by weight in kilograms. A 180 W average for a 70 kg rider works out to 3.67 MET, slightly higher than leisure cycling, but the per-minute calorie figure will match what a Garmin or Wahoo computes.
Drafting in a paceline reduces required power by 25-30 percent at the same speed. Calories burned biking at 18 mph solo (around 10 MET for a 70 kg rider) drops to roughly 7-7.5 MET when sitting on a wheel. Group rides feel easier than solo rides of the same speed for this reason. The calculator shows solo-equivalent values; subtract 25-30 percent for sustained drafting time.
Calories burned biking vs other cardio
Calories burned biking sit in the middle of common cardio activities. Walking at 3 mph is 3.5 MET. Leisure cycling at 9 mph is 4.0 MET. Moderate biking at 13 mph is 6.8 MET. Running a 9-minute mile is 9.8 MET. Swimming freestyle at moderate pace is 8.0 MET. Per hour, running tends to burn more calories than biking, but biking lets you sustain longer sessions, which often produces a larger weekly calorie total despite the lower per-minute rate.
Calories burned biking for weight loss
One pound of body fat stores about 3,500 kcal, which is the figure exercise physiologists have used since Max Wishnofsky published it in 1958. The math is an oversimplification (fat loss involves water, muscle, and metabolic adjustments) but the rule of thumb is useful. A 70 kg rider doing five 60-minute moderate sessions a week burns 2,380 kcal. Combined with a modest dietary deficit, that supports about one pound of fat loss per week.
Long, easy rides are more effective for fat burning at the metabolic level even though they show smaller per-minute calorie figures. At 50-65 percent of max heart rate, the body draws a higher proportion of energy from fat. At higher intensities, glycogen dominates. For total weekly calories burned biking, mixing one or two longer easy rides with two or three shorter intense sessions usually works better than five medium rides.
If your goal is calories burned biking for weight loss, prioritize consistency over intensity. Five 45-minute rides a week at moderate effort produce more total calorie burn than two heroic 90-minute hammerfests followed by recovery weeks. Use the duration quick-picks on the calculator to plan a realistic weekly volume, and recompute after every change to your weight as the numbers shift.
Indoor cycling and power meters
Smart trainers and power meters give the most accurate calories burned biking figure because they measure actual mechanical work in joules. The conversion is simple: kilojoules of mechanical work approximately equals kilocalories of metabolic energy expended, because human cycling efficiency averages around 22-25 percent and the unit conversion (4.184 kJ per kcal) nearly cancels with the efficiency factor. A 60-minute ride at 200 W average produces 720 kJ of mechanical work and burns roughly 720 kcal.
Calories burned biking pitfalls
Three pitfalls catch most riders. First: fitness watches often overestimate by 20-40 percent because they use heart rate alone, which conflates cycling effort with caffeine, dehydration, and ambient heat. Second: the calorie figure assumes steady-state cycling. Long intervals or attacks burn more than the average MET suggests, because anaerobic work creates excess post-exercise oxygen consumption that adds 5-15 percent over the next 12-24 hours. Third: drafting saves much more energy than people expect, so group rides burn 20-30 percent less than the calculator shows.