Calories Burned Cycling: By Speed and Weight

A 155 lb (70 kg) rider cycling at a moderate pace for 30 minutes burns approximately 281 kcal — the equivalent of roughly three medium bananas.

That single number answers the most common question, but the full picture depends heavily on how hard you are riding and how much you weigh. Below we break down the math, show you a weight-by-duration table, and explain what actually moves the needle.

How Calories Burned Cycling Are Calculated

The standard method uses MET — Metabolic Equivalent of Task. MET quantifies exercise intensity relative to sitting quietly (MET 1.0). Moderate cycling at 12–14 mph carries a MET of 8.0 according to the Compendium of Physical Activities (Ainsworth et al., 2011).

The formula is:

Calories = MET × body weight in kg × duration in hours

For a 70 kg rider cycling at MET 8.0 for 0.5 hours: 8.0 × 70 × 0.5 = 280 kcal (we round to 281 kcal in practice). This is gross calorie burn — it includes your resting metabolism, so net burn above doing nothing is slightly lower.

Calories Burned Cycling by Weight and Duration

The table below uses MET 8.0 (moderate cycling, 12–14 mph) from the Compendium of Physical Activities.

Body weight	15 min	30 min	45 min	60 min
125 lb (57 kg)	113 kcal	227 kcal	340 kcal	454 kcal
155 lb (70 kg)	141 kcal	281 kcal	422 kcal	562 kcal
185 lb (84 kg)	168 kcal	336 kcal	503 kcal	671 kcal

Source: MET values from the 2011 Compendium of Physical Activities (Ainsworth et al.).

Want to plug in your exact weight and duration? Use the CalEye calories burned calculator for a personalised estimate.

What Changes the Number

Intensity (Speed)

Speed is the single biggest lever. MET values shift dramatically across cycling speeds:

• Slow cycling, under 10 mph — MET approximately 5.8
• Moderate cycling, 12–14 mph — MET 8.0
• Vigorous cycling, 14–16 mph — MET 10.0
• Racing or high-intensity intervals, 16–19 mph — MET 12.0

Going from a leisurely 10 mph ride to a brisk 14 mph ride increases calorie burn by roughly 38% for the same duration. Going from moderate to racing pace nearly doubles it.

Body Weight

The formula makes this explicit: heavier riders burn more calories per minute at any given speed because they are moving more mass. A 185 lb rider burns about 20% more per session than a 155 lb rider at the same intensity.

Fitness Level and Efficiency

Well-trained cyclists develop more efficient pedalling mechanics over time. At the same measured speed, a seasoned rider may expend slightly fewer calories than a beginner because their muscular coordination wastes less energy. Heart-rate-based monitoring often shows this: a trained cyclist’s heart rate stays lower at a pace that would push a novice hard.

Terrain and Resistance

Hills, headwinds, and heavier bikes all increase energy demand. A 5% gradient can raise energy expenditure by 8–12% over flat-road cycling at the same speed. Indoor cycling on a stationary bike removes wind resistance but allows resistance adjustments that can replicate or exceed outdoor effort.

How to Actually Track It

MET-based estimates are useful benchmarks, but individual variation — body composition, drafting, wind, gradient — means real-world burn can differ by 10–20% from the table values.

For a more accurate picture, combining cycling data with food logging gives you the full energy balance. The principle is the same whether you ride for 20 minutes or two hours: calories in versus calories out, measured consistently.

If you are also tracking daily steps alongside cycling, see how the numbers stack up with the CalEye TDEE calculator to understand how your total daily energy expenditure changes with active days versus rest days.

For context on how cycling fits into a broader weight-loss approach, our post on counting calories to lose weight walks through the deficit math from first principles.

Key Takeaways

• At moderate effort (12–14 mph, MET 8.0), a 155 lb rider burns roughly 281 kcal per 30 minutes
• Body weight and riding intensity are the two biggest variables — not just duration
• Increasing speed from 10 mph to 14 mph raises burn by about 38% for the same ride time
• Combining consistent cycling with accurate food logging is more effective than either alone

After your ride, snap a photo of your recovery meal and log it in CalEye in seconds — so your calorie math stays honest on both sides of the equation.