The Biking Calorie Calculator estimates calories burned cycling from duration, body weight, speed, and terrain using validated MET values. The energy expenditure basis for training load management, weight management, and fueling strategy for endurance cycling events.
652
kcal
9
miles
869
kcal/hr
72
kcal/mile
652
kcal
9
miles
869
kcal/hr
72
kcal/mile
Cycling is one of the most efficient forms of aerobic exercise for caloric expenditure per hour — but the range is enormous: a gentle 15 km/h recovery spin burns fewer calories per hour than a brisk walk, while a 35 km/h sustained effort burns more than most other aerobic activities. Knowing your actual caloric expenditure matters for fueling long rides correctly (the bonk is real and preventable), managing training load across a week, and understanding your energy balance for performance or body composition goals. The biking calorie calculator provides accurate estimates from the validated MET framework.
Metabolic Equivalent of Task (MET) values quantify exercise intensity as a multiple of resting metabolic rate (1 MET = 3.5 mL O₂/kg/min at rest). Calorie burn calculation:
Calories = MET × Weight (kg) × Duration (hours)
Reference cycling MET values (Compendium of Physical Activities, Ainsworth et al. 2011):
For a 75 kg cyclist riding at 25 km/h for 2 hours: Calories = 12.0 × 75 × 2 = 1,800 kcal. Use this online calculator for any speed, weight, and duration. The cycling wattage calculator provides power-based calorie estimation for cyclists with power meters.
Terrain dramatically affects caloric expenditure at the same speed — a 25 km/h average on a hilly course requires far more energy than a flat 25 km/h. MET correction factors for terrain:
A 4-hour mountain sportive with 2,500 m of climbing by a 70 kg cyclist averaging 18 km/h might burn: 8.0 × 1.60 × 70 × 4 = 3,584 kcal — requiring aggressive on-bike fueling (60–90 g of carbohydrate per hour from the second hour onwards) to avoid bonking.
Human glycogen stores (approximately 400–500 g in muscle and liver for a trained cyclist, representing 1,600–2,000 kcal) are insufficient for rides above 90–120 minutes at moderate-to-high intensity without exogenous carbohydrate. The International Society of Sports Nutrition recommends:
Fat oxidation contributes 40–60% of total energy at endurance pace — this contribution is not negligible and explains why trained cyclists can sustain moderate intensity for many hours with judicious carbohydrate supplementation. The BMR calculator and fitness calculators provide complementary energy expenditure analysis tools.
At the same intensity (moderate effort), comparative caloric expenditure per hour for a 75 kg person:
Running burns more calories per hour because it is a weight-bearing activity requiring full support of body weight against gravity on every stride; cycling offloads most of that gravitational work to the bike. However, cycling's lower impact allows longer total duration — a 3-hour ride at moderate pace total calories can exceed a 1-hour run's contribution despite the lower per-hour burn rate.
At a comfortable 12 mph pace on flat terrain, a 160 lb cyclist burns approximately 480–520 calories per hour. Increasing speed to 16 mph or adding significant hills can double this to 800–1,000+ calories per hour. Cycling is particularly effective for maintaining high weekly caloric expenditure because rides of 1–3 hours are sustainable in a way that equivalent-duration running sessions are not. Regular cyclists who ride 100+ miles per week often have exceptionally low body fat percentages despite modest dietary restrictions.
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A 45-minute recreational ride at 12 mph covers 9 miles and burns approximately 422 calories for a 165 lb cyclist.
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A 185 lb rider on a hilly 10-mile route taking 60 minutes burns approximately 755 calories — 30% more than the same ride on flat terrain due to the terrain multiplier.
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