Calories Burned Cycling Calculator

The formula behind the cycling calorie count

Calories per minute on a bike come from one line: MET times 3.5 times body weight in kilograms, divided by 200. Multiply that by the minutes ridden and you have the total for the session.

The 3.5 is oxygen uptake at rest in milliliters per kilogram per minute, which is the definition of one MET. The 200 converts milliliters of oxygen into kilocalories. Put together, the formula says a rider at 8 METs spends eight times the energy of sitting still, scaled to body weight.

A 180 pound rider weighs 81.6 kilograms. At 8.0 METs the rate is 8.0 x 3.5 x 81.6 / 200, which is 11.43 kilocalories a minute, or 686 in an hour. That 8.0 is the Compendium value for riding 12 to 13.9 mph at a moderate effort.

The result is a population average. The formula knows weight, time and intensity and nothing else, so it treats a trained rider and a beginner of the same weight as identical. Treat the output as a planning figure and expect the real session to land near it rather than on it.

MET values for cycling from the Compendium

The Compendium of Physical Activities assigns a MET to each riding style. The 2024 update by Herrmann and colleagues kept the activity codes from the 2011 revision and replaced many estimated values with measured ones.

The table lists the codes a rider is most likely to need, with the calories an hour that each produces for a 180 pound rider over 60 minutes. The full list sits on the Compendium's bicycling page.

The fastest row deserves a second look. Racing above 20 mph costs 16.8 METs, more than four times the leisure pace under 10 mph, so an hour at race pace buys 1,440 calories against 343. Effort does not rise in step with speed: air resistance grows with the square of velocity, and the MET values carry that cost.

Stationary bikes have their own codes. A general indoor session sits at 6.8, the same as a slow outdoor ride, while hard interval work climbs toward the racing rows. The e-bike rows are newer additions, with 6.0 for light assist and 4.0 for high assist.

Worked example: one hour at 12 to 13.9 mph

Take a 180 pound rider who holds 12 to 13.9 mph for 60 minutes. Weight converts to 81.6 kilograms, the MET is 8.0, and the rate is 11.43 calories a minute. Sixty minutes gives 686 calories.

Halve the ride and the total halves: 30 minutes is 343 calories. The same rider reaches 500 calories at 44 minutes, because 500 divided by 11.43 is 43.7.

Per kilogram, the hour costs 8.4 calories. That figure travels well: 8.0 METs times 3.5 divided by 200, times 60 minutes. Multiply it by any body weight in kilograms to get the hourly burn for this intensity without opening a calculator.

The 8.0 is doing a lot of work in that example. Ride the same hour at 16 to 19 mph and the total climbs to 1,029, a 50 percent increase for a pace most leisure riders cannot hold for long.

Worked example: a 45 minute commute and a lighter rider

A commute ridden at 10 to 11.9 mph sits at 6.8 METs. For the same 180 pound rider, 45 minutes comes to 437 calories: 9.72 a minute times 45.

Body weight moves the total in a straight line. A 150 pound rider weighs 68.0 kilograms, so the same 6.8 METs produce 8.10 a minute and 364 calories over 45 minutes. Push that rider to 10.0 METs for 90 minutes and the session reaches 1,072 calories at 11.91 a minute.

Two riders, one road. The heavier rider burns more for the same ride because moving more mass takes more work, which is why the calculator asks for weight before anything else. It is also why the same route gets easier to burn on as fitness improves: the speed goes up while the weight stays put.

The half hour row is the one most commuters need, and the 90 minute row covers a weekend ride. Multiplying any row by the number of rides in a week gives the weekly total to check against the 150 minute target.

E-bike assist cuts the burn roughly in half

An e-bike does not erase the work, it shares it. The Compendium puts an e-bike with no assist at 6.8 METs, light assist at 6.0 and high assist at 4.0.

For the 180 pound rider over an hour, that is 583 calories unassisted, 514 with light assist and 343 with high assist. Against the unassisted ride, light assist keeps 88.2 percent of the burn and high assist keeps 58.8 percent. Against a 12 to 13.9 mph ride on a regular bike, high assist keeps exactly half.

The comparison that matters is against the same trip in a car, which costs about 1 MET. A 30 minute commute on high assist still burns 171 calories, so the e-bike replaces a sedentary trip rather than a training session. That distinction decides whether the assist is a tool or a shortcut, and both answers are reasonable.

Weight changes the total in a straight line

At the same MET and duration, the burn scales with body weight. A 120 pound rider at 8.0 METs burns 457 calories in an hour, a 180 pound rider 686, and a 220 pound rider 838.

The relationship is close to linear because the formula multiplies by kilograms. Add 40 pounds to the 180 pound example and the hourly total rises by 152 calories, which is 22.2 percent.

Real riders bend the line a little. A heavier rider often produces more power at the same perceived effort and covers more ground, and a fit rider moves faster at the same MET. The formula ignores both, which is the price of a method that needs only a scale and a clock.

Use the weight you have now rather than a goal weight. A rider planning to lose 20 pounds gets a more useful number from today's body, because the plan has to reflect the effort the body is making this week.

Read the table down a single column and the pattern is easy to follow: each 30 pounds of body weight adds roughly 95 calories to the hour at this intensity. That is why the same group ride reports different totals on two watches.

Building a week around 150 minutes

The CDC's activity guidance for adults asks for 150 minutes of moderate activity a week, or 75 minutes of vigorous activity, plus two days of strength work.

Moderate cycling sits near 6.8 METs. For the 180 pound rider, 150 minutes at that intensity comes to 1,457 calories. Vigorous riding near 12.0 METs reaches 1,286 calories in 75 minutes. The two routes differ by about 12 percent, which is why the guideline treats them as equivalent.

Five rides of 30 minutes at 8.0 METs total 1,715 calories and 150 minutes, and they fit a working week more easily than two long rides. The minute field accepts any duration, so a 22 minute commute each way can be added up across the week and checked against the target.

None of this has to happen on a road bike. A stationary bike at 6.8 METs produces the same estimate as the outdoor row, and a mountain bike at 8.5 sits between the moderate and vigorous road paces.

What the estimate leaves out

The number is gross energy spent on the bike, not the net cost of the ride. Sitting still would have burned 86 calories in that hour at 1 MET, so the net figure for the 686 calorie ride is closer to 600.

It also leaves out the recovery period, drafting, wind, terrain and how efficiently a given rider pedals. Two people of the same weight and speed can differ by a wide margin in measured energy cost, which is why the Compendium reports averages drawn from laboratory measurements rather than a single number for every rider.

A heart rate monitor or a power meter gives a personal estimate that beats a table, and a power meter does it best because it measures the work at the crank. The MET method stays useful because it needs nothing but weight and time, and it gives a consistent figure to compare one week with the next.

This is not medical advice. Talk to a clinician before starting a riding plan after a long break, and treat chest pain, dizziness or unusual breathlessness as a reason to stop rather than a number to push through.