Quick Answer
A 70 kg rider burns roughly 280 kcal/hour at leisure pace (15 km/h), 480 kcal/hour at moderate pace (20 km/h), and 700 kcal/hour at vigorous pace (28 km/h). The formula: Calories = MET × weight (kg) × hours. Heavier riders burn more. Hills, wind, and bike type increase the numbers further.
Cycling Calorie Calculator
Cycling Calories Burned by Speed and Body Weight
The table below shows estimated calories burned per hour of cycling at different speeds, for five common body weights. All values assume flat terrain and road cycling. Hills, wind, and mountain biking increase these figures by 15–60%.
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| Speed | MET | 55 kg | 65 kg | 75 kg | 85 kg | 95 kg |
|---|---|---|---|---|---|---|
| Leisure (<16 km/h) | 4.0 | 220 | 260 | 300 | 340 | 380 |
| Light (16–19 km/h) | 6.8 | 374 | 442 | 510 | 578 | 646 |
| Moderate (19–22 km/h) | 8.0 | 440 | 520 | 600 | 680 | 760 |
| Brisk (22–25 km/h) | 10.0 | 550 | 650 | 750 | 850 | 950 |
| Vigorous (25–30 km/h) | 12.0 | 660 | 780 | 900 | 1,020 | 1,140 |
| Racing (30+ km/h) | 15.8 | 869 | 1,027 | 1,185 | 1,343 | 1,501 |
Values calculated using: Calories = MET × weight (kg) × 1 hour. MET values from the 2024 Compendium of Physical Activities. Rounded to nearest whole number. Actual burn varies with fitness, terrain, wind, and bike setup.
To calculate for your specific duration: multiply the hourly figure by your ride time in hours. For example, a 75 kg rider cycling at moderate pace (8.0 MET) for 45 minutes burns approximately 600 × 0.75 = 450 kcal.
Calories Burned by Distance
Many riders think in distance rather than time. Here’s a quick reference for a 75 kg rider at moderate pace (~20 km/h):
| Distance | Approx. Time | Estimated Kcal (75 kg) |
|---|---|---|
| 10 km | 30 min | 300 |
| 20 km | 60 min | 600 |
| 30 km | 90 min | 900 |
| 50 km | 2.5 hours | 1,500 |
| 100 km | 5 hours | 3,000 |
These are estimates for flat terrain at a steady moderate pace. In reality, most rides include variation — hills, headwinds, stops — so actual burn will differ. A typical cycling speed for recreational riders is 18–24 km/h, which puts most rides in the moderate-to-brisk range.
How the Formula Works
The cycling calorie calculator uses the MET (Metabolic Equivalent of Task) method — the same formula used in exercise science research and clinical settings:
Calories burned = MET × body weight (kg) × duration (hours)
One MET equals the energy cost of sitting quietly — roughly 1 kcal per kg per hour. Cycling at moderate pace (8.0 MET) burns 8 times more energy than sitting still. The formula accounts for your body weight (heavier riders burn more) and duration, and the MET value captures intensity.
MET values for cycling come from the Compendium of Physical Activities, a standardised research database maintained by Arizona State University. The values are based on laboratory measurements of oxygen consumption during cycling at various speeds and are considered accurate within 10–15% for most individuals.
Limitations: MET-based estimates don’t account for individual fitness level, body composition (muscle vs fat), environmental conditions (wind, heat), or cycling efficiency. A highly trained cyclist may burn fewer calories at the same speed than a beginner because they pedal more efficiently. For more precise tracking, a power meter on your bike calculates actual work done in kilojoules, which can be converted directly to calories with greater accuracy.
What Affects Cycling Calorie Burn?
Body Weight
The single biggest factor. A 90 kg rider burns roughly 25–30% more calories than a 70 kg rider at the same speed and duration. This is because moving a heavier body requires more energy. If you’re cycling for weight loss, this means you’ll burn more calories per ride when you’re heavier — and progressively less as you lose weight (which is normal, not a plateau).
Speed and Intensity
Calorie burn increases roughly exponentially with speed, not linearly. This is because aerodynamic drag increases with the square of velocity — riding at 30 km/h requires roughly four times the power of riding at 15 km/h, not twice. This makes faster riding disproportionately more expensive in terms of energy.
Terrain
Climbing burns significantly more calories than flat riding. A hill with 5% gradient can increase energy expenditure by 30–50% compared to flat terrain at the same speed. Descending costs very little energy (you’re coasting), but the net effect of a hilly ride is still higher calorie burn than a flat ride of the same distance.
Wind
A headwind increases drag and energy cost — a 20 km/h headwind can roughly double the power required at the same speed. A tailwind does the opposite. Cross-winds have a smaller but real effect. This is one reason outdoor rides often burn more than indoor trainer rides of the same duration.
Bike Type
Road bikes are more efficient than mountain bikes (lower rolling resistance, more aerodynamic position), so a mountain bike ride burns more calories at the same speed. Indoor stationary bikes eliminate wind resistance and coasting, but add artificial resistance. Calorie estimates from smart trainers using power data tend to be more accurate than MET-based estimates.
Indoor vs Outdoor Cycling Calories
Indoor cycling on a trainer or stationary bike eliminates two major calorie-burning factors: wind resistance and terrain variation. However, indoor sessions also eliminate coasting — you’re pedalling constantly, with no downhills or traffic stops. The net result: indoor and outdoor cycling burn roughly similar calories at the same perceived effort, though the mechanisms differ.
Smart trainers that measure power output (watts) provide the most accurate calorie data. The conversion is straightforward: 1 kilojoule (kJ) of work measured by the power meter equals approximately 1 kcal burned (because the human body is about 20–25% efficient, and the kJ-to-kcal conversion factor is 4.184, these roughly cancel out). If your trainer shows 600 kJ for a session, you burned approximately 600 kcal.
If you train with power, your FTP (functional threshold power) is the best benchmark for intensity. The higher your FTP, the more energy you can sustain per hour — and the more calories you burn at threshold intensity.
Cycling Calories vs Running and Walking
Cycling burns fewer calories per minute than running at comparable intensities, but you can sustain cycling for longer because it’s lower impact. Over a full session, the total burn can be similar or even higher for cycling. For a detailed comparison with specific numbers, check our cycling vs running calories guide. For cycling versus walking, see does cycling burn more than walking?
FAQ: Cycling Calorie Calculator
How many calories does cycling burn per hour?
Depends on weight and speed. A 75 kg rider burns ~300 kcal/hour at leisure pace, ~600 kcal/hour at moderate pace, and ~900 kcal/hour at vigorous pace. See the full table above.
How is the calculation done?
Calories = MET × body weight (kg) × duration (hours). MET values range from 4.0 (leisure) to 15.8 (racing). Values come from the Compendium of Physical Activities.
Does cycling burn more than walking?
Yes — roughly twice as many calories per hour at moderate intensity. But cycling is lower impact and more sustainable for longer sessions.
How many calories does a 30 km ride burn?
At 20 km/h (1.5 hours), roughly 900 kcal for a 75 kg rider on flat terrain. Adjust up for hills or heavier body weight.
Do heavier riders burn more calories?
Yes. A 90 kg rider burns 25–30% more than a 70 kg rider at the same speed and duration. The formula includes body weight as a direct multiplier.
Using Calorie Data for Training and Weight Loss
Knowing your calorie burn per ride is useful, but context matters. Here’s how to apply it practically:
Fuelling during rides. For rides under 60 minutes at moderate intensity, you typically don’t need to eat during the ride — your glycogen stores are sufficient. For rides over 90 minutes, aim for 30–60 grams of carbohydrates per hour to maintain energy. Post-ride nutrition (carbs + protein within 30–60 minutes) accelerates recovery.
Weight loss. A sustained calorie deficit of 250–500 kcal/day is the recommended range for healthy, sustainable weight loss. Three moderate cycling sessions per week can contribute 1,200–1,800 kcal toward that deficit — meaningful, but only if you don’t compensate by eating more. Track both your riding and your nutrition for best results. For a deeper dive into this, see our cycling for weight loss guide.
Don’t over-rely on calorie numbers. All estimates (MET-based, GPS watch, smart trainer) have margins of error. Use them as a guide, not gospel. The best approach is to track trends over weeks rather than obsessing over single-ride numbers.
Our cycling coaching builds your fitness progressively with structured sessions, recovery guidance, and nutrition advice — whether your goal is weight loss, endurance, or racing.
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