Cycling is one of the most efficient calorie-burning exercises available — gentle enough for long rides yet intense enough to rival running when you push the pace. This calculator tells you exactly how many calories you burn cycling based on your weight, average speed, road gradient and how long or far you ride. It also shows you a live comparison chart so you can see what pushing to the next intensity band would mean for your total burn.
How it works
The calculator uses the MET (Metabolic Equivalent of Task) energy-expenditure formula from the Ainsworth et al. (2011) Compendium of Physical Activities — the gold-standard reference used by sports scientists, fitness apps and research papers worldwide:
kcal per minute = (MET × 3.5 × body mass in kg) ÷ 200
Total calories = kcal per minute × minutes ridden.
Your average speed determines the MET value automatically:
| Speed | Intensity | MET |
|---|---|---|
| Below 16 km/h | Leisure | 4.0 |
| 16–19 km/h | Light | 6.8 |
| 19–22 km/h | Moderate | 8.0 |
| 22–26 km/h | Vigorous | 10.0 |
| 26–30 km/h | Very Vigorous | 12.0 |
| 30+ km/h | Racing | 15.8 |
Gradient adjustment
Climbing adds real work — you are moving mass against gravity on top of the usual rolling and aerodynamic resistance. The calculator approximates this using a +0.2 MET per percent of average gradient, a conservative estimate derived from standard cycling power physics. A 3% average gradient therefore adds 0.6 MET to your base intensity.
Distance mode
If you enter a distance rather than a duration, the calculator divides the distance by your speed to compute ride time and then applies the formula. It also reports kcal per kilometre, which is useful for comparing route options of different lengths.
Worked example
A 78 kg rider completes a hilly 40 km sportive at an average speed of 22 km/h with a 4% average gradient:
| Step | Calculation | Result |
|---|---|---|
| Base MET (22 km/h → vigorous) | — | 10.0 |
| Gradient bonus (4% × 0.2) | +0.8 MET | 10.8 effective MET |
| Duration | 40 km ÷ 22 km/h | 109 min |
| kcal/min | (10.8 × 3.5 × 78) ÷ 200 | 14.7 kcal/min |
| Total | 14.7 × 109 | ~1,602 kcal |
That is a substantial energy output — roughly two-thirds of an average adult’s daily resting requirement in a single ride. Fuelling with around 60 g of carbohydrate per hour (an energy gel every 20–25 minutes) would supply about 650 kcal of that demand from exogenous sources, leaving the remainder drawn from glycogen and fat stores.
Formula note
The underlying formula is an approximation calibrated to a population average. Real calorie expenditure depends on rider position (aerobars vs. hoods), drivetrain efficiency, tyre rolling resistance, air density, crosswinds and individual metabolic variation. Research suggests MET-based estimates are typically within ±10–25% of calorimeter-measured values for steady cycling efforts. A cycling power meter plus heart-rate monitor provides the most personalised measurement, but for planning nutrition, comparing rides or setting training targets, the MET method is reliable and widely accepted.
Every number shown is calculated locally in your browser — nothing is uploaded or stored.