1 Hour Cycling Calories Calculator

The formula behind the one hour number

Every number on this page comes from one formula. Calories per minute equal the MET value of the ride times 3.5, times your weight in kilograms, divided by 200. Ride for 60 minutes and the per minute rate builds the whole hour. The MET values come from the 2024 Adult Compendium of Physical Activities, the standard reference that researchers use to score how hard activities are.

Here is the moderate pace case worked out in full. A 180 pound rider weighs 81.6 kilograms. The Compendium lists riding at 12 to 13.9 mph at 8.0 METs. So the math runs 8.0 x 3.5 x 81.6 / 200 = 11.43 calories each minute, and 11.43 x 60 = 686 calories for the hour. Change the weight or the pace and the same formula gives every other figure in the tables below.

One MET is the energy cost of sitting still, about 1 calorie per kilogram of body weight per hour. That is why the formula carries your weight in it: a heavier rider pays more for every minute of the same pace.

Two constants are easy to mix up. The 3.5 is oxygen use at rest in milliliters per kilogram per minute, and the 200 converts milliliters of oxygen into calories. Drop either and the answer misses by a wide margin. Weight also has to be in kilograms, and the pound to kilogram step is the one people skip: 180 pounds is 81.6 kilograms, not 180.

What each pace costs across the hour

Pace moves the MET value more than anything else. The Compendium splits road riding into speed bands, and the bands step up hard: doubling from an easy spin to race pace more than quadruples the burn. The table shows the full hour for a 180 pound rider, plus the distance that pace covers in 60 minutes.

Read the middle rows first if you are new to this: most riders who commute or ride for fitness settle between 11 and 14 mph, which puts a normal hour between 583 and 686 calories. The 1,440 figure at the top is race training, and holding that band for a full hour is rare outside racing.

The bands assume level ground and steady pedaling. A ride with three long stops spends part of the hour near 1.5 METs, so a stop and go city commute at a 13 mph average often prices closer to the 6.8 band than the 8.0 band. Average speed hides the stops, which is why a mixed commute can read high.

How your weight scales the hour

Weight enters the formula in a straight line. Double the rider, double the burn at the same pace. The table holds pace still at 12 to 13.9 mph and moves the rider.

Five pounds of rider changes the hour by about 19 calories at moderate pace. That is small enough that guessing your weight to the nearest 10 pounds is fine, but big enough that comparing your number to a friend's needs the weight difference in mind.

The straight line works in both directions. Lose 10 pounds and the moderate hour drops by about 38 calories, which is 38 x 5 = 190 calories across five rides in a week. That is a smaller effect than most riders expect, and it is why pace changes move the total faster than weight changes do.

Gross calories, net calories and the resting part

The 686 figure is a gross number: it counts everything your body burns during the hour, including the calories you would have burned sitting on the couch. The net number strips that out. Net calories equal the gross total minus one MET worth of resting burn, so the net math for the same 180 pound rider at 8.0 METs runs 7.0 x 81.6 x 1.05 = 599.8, which rounds to 600 net calories for the hour.

Which one you care about depends on the question. If you are comparing a bike ride against any other use of the same hour, the gross number is honest: 686 is what the hour costs, and the alternative hour spent sitting costs 86. If you are adding exercise on top of a day you would have spent partly moving anyway, the net number keeps you from double counting.

The 3,500 calorie figure behind the one pound rule is a rough average, not a law of nature: real weight change also moves water, glycogen and muscle. What matters here is scale. The moderate 686 calorie hour covers about a fifth of that pound, so chasing a huge number in one ride is the wrong way to use the estimate.

A week of hour long rides against the CDC targets

The CDC activity guidelines ask adults for 150 minutes of moderate activity a week or 75 minutes of vigorous activity, plus two days of muscle work. Where does an hour on the bike land? The CDC intensity guide puts riding faster than 10 mph in the vigorous column, so the 12 to 13.9 mph hour above is vigorous time.

That makes the weekly math easy. Two hour long rides give you 120 vigorous minutes, and any third ride pushes you past the 75 minute target with room to spare. Five rides a week at moderate pace burn 686 x 5 = 3,430 calories, and 3,430 / 3,500 = 0.98, close to one pound of calories in a week from riding alone.

Hills, e-bikes and stationary bikes

The road table assumes flat ground and a steady pace. Real rides wander. The Compendium prices mountain biking on general terrain at 8.5 METs, which gives a 180 pound rider 729 calories over the hour. Climbing hard costs far more, coasting costs less, and stop light city riding lands between the bands because you keep restarting from zero speed.

E-bikes cut the number in a way riders often underestimate. The 2024 Compendium lists an e-bike with light electronic support at 6.0 METs, or 514 calories for the 180 pound hour, and without any support at 6.8 METs, or 583 calories. The assist changes the effort, not the miles, so an e-bike hour is a lighter hour at the same speed.

Indoor riding prices out almost the same as the road. A stationary bike at 126 to 150 watts sits at 8.0 METs, the same 686 calories for the hour, so the trainer and a flat 13 mph road ride are close cousins. Wind and hills are the parts the road adds back.

Drafting is the other quiet factor. Sitting in a group at 22 mph can cost less than riding alone at 18, because the rider in front moves the air. No table can see the gap between two wheels. Wind alone can move an hour by 15 percent in either direction, and a headwind out with a tailwind home rarely cancels out, since you spend longer fighting the wind than riding with it.

What the estimate leaves out

The Compendium's own authors warn that these MET values are survey averages, not personal measurements. Riders differ in efficiency, and wind, grade, temperature, drafting and bike fit all move the real cost of an hour. Treat every figure here as a fair middle estimate for a steady ride on level ground, not a lab reading.

Fitness matters too. A trained rider burns slightly less for the same pace, and heart rate based watches can swing 10 percent or more either way against a MET table. If you are getting started, the NIH MedlinePlus exercise guide covers building the habit safely, and the honest use of this page is comparing paces and weights, not auditing your watch.

A free check costs nothing: ride a loop you know, time it, and compare the average speed to the bands above. If the loop reads 13.4 mph and the effort felt hard, the 10.0 band fits better than the 8.0 band, because the table prices speed and the body pays for effort. Speed is the input the table can see.

Half an hour, a full hour and ninety minutes

Time scales in a straight line inside the formula, so a shorter or longer ride does not need a new method. The table holds the pace at 12 to 13.9 mph for a 180 pound rider and moves only the clock.

Ninety minutes is 1.5 times the hour, and the calories are 1.5 times too. Riders often assume a long ride burns more per minute than a short one. It can, but only because fatigue and terrain push the pace up, and that shows up as a higher MET rather than a different formula. A flat, steady 90 minutes prices exactly like a flat, steady hour plus half of another.