Bicycle Calorie Calculator

A 170 lb rider on a hybrid at 12 mph burns about 194 calories in 30 minutes

Ride a hybrid on flat ground at an average of 12 mph for 30 minutes (6 miles) and a 170 lb rider burns about 194 kcal. Around 40 kcal of that is what the body spends at rest anyway, so the extra “active” calories from the ride come to about 154 kcal. On the same ride a road bike comes to 174 kcal, and a mountain bike on rough ground comes to 257 kcal.

The calculator above first works out the power (watts) the bike needs to hold your speed, then converts that power into the oxygen, and so the energy, your body uses to produce it. Power comes from a physics model of air, rolling and climbing resistance (Martin et al. 1998), and energy from the American College of Sports Medicine (ACSM) leg-cycling equation. Calculators that multiply one MET value per speed band show 324 kcal for the same ride; the reason for the gap is explained in Why the numbers differ from MET-table calculators. This result assumes flat ground, no wind and a steady speed, so it sits close to the low end of what a real ride burns.

When it is useful to know how many calories you burned cycling

• Turning a commute or a weekend loop into calories: copy the distance, time (or average speed) and elevation gain from your cycling app.
• Training on an indoor bike or smart trainer: enter the average watts from the screen for the most accurate result. If your bike does not show watts, pick a general stationary bike or a spin class.
• Wondering whether an e-bike still counts as exercise: compare how much your own legs contribute, and how many calories you burn, at each assist level.
• Comparing bikes and speeds for the same time: the bike cards at the top and the “Changing only speed” chart show the same ride side by side.

Calories are only one part of what cycling does for you. In a UK study that followed 263,450 adults for a median of 5 years, people who cycled to work had a 41% lower risk of dying from any cause (hazard ratio 0.59), a 46% lower risk of cardiovascular disease (0.54) and a 45% lower risk of cancer (0.55) than people who commuted by car or public transport (Celis-Morales et al. 2017). It is an observational study, so the benefit cannot be pinned on cycling alone, but the gap remained after adjusting for major risk factors.

How to use the calculator

1. Pick a bike: tap Road, Hybrid, Mountain bike, E-bike or Indoor bike in the cards at the top. Each card shows the calories for that bike on the same ride.
2. Enter the ride: choose any two of “Time + average speed”, “Distance + time” or “Distance + average speed”, and the third is filled in as “auto”. Use moving time, without stops at lights or breaks, and the average speed over the moving part.
3. Enter your weight and the bike + gear weight: the weight field is for your body only. Bike, bag and luggage go in the field below it. Choosing a bike pre-fills a typical weight for that type.
4. Add the climbing: enter the elevation gain from your app (all the uphill added together). Leave it at 0 for flat rides.
5. Enter your power if you have it: if a power meter or an indoor bike shows average watts, put them in the “Average power” field. Left empty, the calculator estimates it from speed and conditions.
6. Read the result: the big number is the total calories burned during the ride. The bars next to it show how that total splits into resting burn, turning the legs, muscle heat and pedal work, and how the pedal work was spent against air, rolling resistance and climbing. The intensity card also shows how much of the weekly guideline the ride covers: adults are advised to get 150 to 300 minutes of moderate activity or 75 to 150 minutes of vigorous activity a week, with 1 vigorous minute counting as 2 moderate minutes (HHS Physical Activity Guidelines for Americans 2018; WHO 2020).

How the calories are calculated

The calculation has two steps. First it finds the pedal power needed to hold your average speed, then it converts the oxygen needed to produce that power into calories.

Pedal power (W) = (air drag + rolling resistance + climbing) ÷ 0.976

Power against air is ½ × air density 1.225 × CdA × speed³. Power against rolling resistance is Crr × (body weight + bike and gear) × 9.807 × speed. Climbing is (body weight + bike and gear) × 9.807 × elevation gain ÷ time. Speed goes in as meters per second, and 0.976 is the drivetrain efficiency, allowing for about 2.4% lost in the chain and gears. Martin et al. (1998) checked this model against power-meter readings on real roads, and the same calculation code runs in the Roberin bike speed calculator.

VO₂ (mL/kg/min) = 1.8 × power (W) × 6.118 ÷ body weight + 3.5 + 3.5

The ACSM leg-cycling equation assumes 1.8 mL of oxygen for every watt (6.118 kg·m per minute of work), then adds 3.5 for resting metabolism and 3.5 for turning the pedals with no load. Converting at 5 kcal per litre of oxygen gives calories per minute = VO₂ × body weight ÷ 200. The equation is most accurate for work rates of 300 to 1,200 kg·m per minute (50 to 200 W).

The 194 kcal splits into 40 kcal of resting burn, 40 kcal for turning the legs, 84 kcal of muscle heat and 30 kcal of pedal work (68.5 W × 1,800 s ÷ 4,184 ≈ 29.5), the same split the bar in the calculator shows. In this equation, muscle gives off about 2.8 times the work it delivers to the pedals as heat. The values used for each bike type are below, and you can change the bike + gear weight in its field.

Why the numbers differ from MET-table calculators

Most cycling calorie calculators multiply a MET value from the 2024 Adult Compendium by your weight and your time. They use one value per speed band, such as 8.0 MET for 12 to 13.9 mph and 10.0 MET for 14 to 15.9 mph, so at the 12 mph boundary the value jumps from 6.8 to 8.0 MET and the calories jump with it. This calculator keeps following the power, which grows with the cube of speed once air drag takes over, so the result rises smoothly.

170 lb · 1 hour · flat · no wind. A MET table uses the same MET for every body weight and every bike type.

At 12 mph the MET-table figure is about two thirds higher than this calculation. Studies that measured oxygen uptake found more than this calculation’s 4.8 MET at 12 mph. In 12 people riding a 4.3 km commute-like course, the same e-bike with no assist came to 6.1 MET (Simons et al. 2009), and ordinary bikes came to 8.4 MET (Berntsen et al. 2017, converted with 1 MET = 3.5 mL/kg/min and summarized by Bourne et al. 2018). The 2024 Compendium’s commuting row (01011, self-selected pace) is 6.8 MET. All of these are above the 4.8 MET this calculator gives for 12 mph, because the calculation assumes flat ground, no wind and a steady speed. Read it as a value close to the lower bound of what a real ride burns: restarts after traffic lights, headwinds and short hills all take more power, so the real burn on such routes can be higher. If you enter average watts from a power meter or an indoor bike, the result is based on the work you actually did.

Cycling calories by body weight and time

These figures are for a hybrid on flat ground at an average of 12 mph. The calculation keeps CdA fixed whatever your build, so calories do not rise in direct proportion to weight the way a MET table suggests. In reality a heavier rider usually has a larger frontal area too, so the differences between weights are a bit larger than this table shows.

Hybrid · 12 mph average · flat · no wind.

The same distance can cost different amounts depending on speed. For a 170 lb rider on a hybrid, 5 miles at 8 mph (38 minutes) is 166 kcal, at 10 mph (30 minutes) it is 159 kcal, at 12 mph (25 minutes) it is 162 kcal, and at 15 mph (20 minutes) it is 178 kcal. Going slowly stacks up more resting burn and leg-turning time, and going fast means fighting more air drag, so in this calculation a given distance on a hybrid costs the fewest calories at around 10 mph.

Adding hills

Climbing means lifting your body and the bike. The calculator adds (body weight + bike and gear) × 9.807 × height of work to the flat-ground power for the elevation gain you enter. Here is a 170 lb rider on a hybrid at an average of 12 mph for 1 hour.

170 lb · hybrid · 12 mph average · 1 hour. 0 ft is flat ground.

The energy you regain on descents is not subtracted. Most of it is lost to braking and the higher air drag, but part of it does return as time spent coasting, so a loop course with many ups and downs can come out higher than reality. A MET table, on the other hand, has no climbing term at all; on a slow climb it applies the value for a lower speed band and comes out too low.

E-bike calories

In California, a Class 1 e-bike provides assistance only while the rider is pedaling and stops assisting when the bicycle reaches 20 mph; a Class 3 e-bike stops at 28 mph (California Vehicle Code §312.5). Federal law likewise defines a low-speed electric bicycle as one with a motor of less than 750 watts whose top speed on motor power alone is under 20 mph (15 U.S.C. §2085). That is why this calculator covers pedal-assist riding up to an average of 20 mph (the Class 1 limit) and leaves Class 3 speeds outside its range. Riding on a throttle alone is not exercise, so only pedaling with motor help is counted.

The motor adds a share of the power you put in. Bosch lists the share for each riding mode as up to 60% of rider power in Eco, up to 140% in Tour, up to 240% in Sport and up to 340% in Turbo. The calculator’s Low, Medium and High use the maximum ratios of Eco, Tour and Turbo, and your own leg power is the power needed ÷ (1 + assist ratio). The calculation assumes the motor always gives its maximum ratio, so the intensities in the table below sit close to the lower end of what a real ride takes. If the motor gives less, you do more of the work.

170 lb · 12 mph average · 30 min · flat · 50.7 lb (23 kg) bike. “—” means the MET table has no matching row.

Measured studies found people using far more energy with assistance than this calculation gives. In 12 people riding a 4.3 km commute-like course on the same e-bike, the effort was 6.1 MET with no assist, 5.7 MET on Eco and 5.2 MET with strong assist, all above the 3 MET moderate threshold, and the riders went faster when assisted (Simons et al. 2009), so the real burn can be higher than the table. In an experiment with 8 previously inactive women riding 9.5 km with a 102 m elevation difference, assistance cut energy expenditure by 36.5% (Sperlich et al. 2012).

Indoor bike and spin class calories

An indoor bike has no air or rolling resistance; all of your pedal work becomes heat in the resistance unit (magnet, fan or friction). That makes the average watts on the screen the best input for the ACSM equation. Speed and distance on the screen are not used, since every machine computes them differently.

170 lb.

For a 170 lb rider, the intensity from the ACSM equation lines up with the 2024 Compendium stationary-bike watt rows to within about 10% in most rows. If your bike does not show power, choose the Compendium’s general stationary bike at 6.8 MET (275 kcal for 30 minutes at 170 lb) or a spin class at 9.0 MET (364 kcal). For a 170 lb rider, 6.8 MET is about 118 W of average power and 9.0 MET is about 172 W.

When your watch or app says something different

• Compare total with total, active with active: a watch’s “active calories” leave out the calories you burn at rest, so compare it with the active figure here.
• The “kJ ≈ kcal” rule in power-meter apps: it assumes human efficiency of 20 to 25% and the 4.184 kJ per kcal cancel each other out (TrainingPeaks). At low power the resting and leg-turning share is larger, so the rule comes out low; the gap narrows as power rises. An hour at 60 W is 216 kJ, while this calculator gives 360 kcal for a 170 lb rider; an hour at 200 W is 720 kJ against 823 kcal (about 14% more). A review of cycling efficiency explains that gross efficiency depends strongly on work rate because the zero-work-rate baseline energy matters less as work rate rises (Ettema & Lorås 2009). The calories in the Roberin bike speed calculator use this kJ rule.
• Watches that use heart rate: they estimate calories from heart rate, not power, so the same power on a day with a different heart rate gives a different number.
• Match the time basis: apps with auto-pause report moving time, while apps without it include stops.

Common mistakes

• Adding the bike’s weight to your body weight: the bike and gear have their own field, so the weight would be counted twice. Enter only your body weight.
• Entering a top speed, or a time that includes breaks: use the average speed over the moving part and the moving time.
• Entering the speed from an indoor bike screen: choose Indoor bike, then enter average watts or pick the workout type.
• Calculating an e-bike ride as a regular bike: the work done by the motor would be counted as yours and the calories would come out too high.
• Entering elevation twice: for a loop, enter only the total climbing from your app and leave the descent out.

Limits

• Power is calculated for steady riding on flat ground in still air. Headwinds, restarts after traffic lights, drafting behind other riders and rough surfaces are not modeled.
• CdA, Crr and weight for each bike type are typical assumptions. The CdA values sit inside the range measured in wind tunnels (Crouch et al. 2017), but they vary a lot with body shape, clothing and position.
• Climbing adds only the potential energy of the elevation gain, and does not subtract anything for energy regained on descents.
• The ACSM equation is most accurate between 50 and 200 W. Very slow rides, or rides with many hard efforts, can have larger errors.
• E-bike assistance uses the maximum ratios of Bosch riding modes. Assist behaviour differs between manufacturers and models.
• These are estimates from an average-adult equation, not a medical measurement. Stop and talk to a doctor if you have chest pain, dizziness or severe shortness of breath.

As of 2026-10-19, the 2024 Adult Compendium bicycling METs, the ACSM leg-cycling equation, the Bosch riding-mode assist ratios, California Vehicle Code §312.5, 15 U.S.C. §2085, the HHS Physical Activity Guidelines for Americans (2nd edition, 2018) and the WHO 2020 guidelines were checked.

Sources

• 01Martin JC, et al. Validation of a Mathematical Model for Road Cycling Power. J Appl Biomech. 1998;14(3):276-291Power model built from air drag, rolling resistance, gravity and drivetrain loss, compared with road measurements
• 02Ohio University thesis (citing ACSM’s Guidelines for Exercise Testing and Prescription): metabolic equation for leg cycling ergometryVO2 = 1.8 × WR ÷ body weight + 3.5 + 3.5, most accurate at 300 to 1,200 kg·m/min (50 to 200 W)
• 032024 Adult Compendium of Physical Activities: BicyclingMETs for speed bands (01010 to 01060), commuting (01011), mountain biking (01009), e-bikes (01080 to 01088), stationary-bike watt rows (01210 to 01248) and spinning (01270)
• 04Herrmann SD, et al. 2024 Adult Compendium of Physical Activities. J Sport Health Sci. 2024;13(1):6-12Definition of the MET and the values by activity
• 05Simons M, et al. Electrically assisted cycling: a new mode for meeting physical activity guidelines? Med Sci Sports Exerc. 2009;41(11):2097-2102Same e-bike, 12 riders, 4.3 km: 6.1 MET with no assist, 5.7 on Eco, 5.2 with strong assist
• 06Sperlich B, et al. Biomechanical, cardiorespiratory, metabolic and perceived responses to electrically assisted cycling. Eur J Appl Physiol. 2012;112(12):4015-40258 women, 9.5 km: energy expenditure 36.5% lower with assist
• 07Bourne JE, et al. Health benefits of electrically-assisted cycling: a systematic review. Int J Behav Nutr Phys Act. 2018;15:116Intensity by study (Berntsen 2017, standard MET conversion: e-bike 6.9, conventional bike 8.4)
• 08Bosch eBike Systems: Riding modesEco up to 60%, Tour up to 140%, Sport up to 240%, Turbo up to 340% of rider power
• 09California Vehicle Code §312.5 (electric bicycle classes)Class 1 assists only while pedaling and stops at 20 mph; Class 3 stops at 28 mph
• 1015 U.S.C. §2085 (low-speed electric bicycles)Motor under 750 W, top speed on motor power alone under 20 mph
• 11Crouch TN, et al. Riding against the wind: a review of competition cycling aerodynamics. Sports Engineering. 2017;20:81-110Wind-tunnel CdA: upright 0.27 to 0.36 m² (one study 0.43 to 0.52), drops 0.24 to 0.33 m²
• 12TrainingPeaks: Predicting and Measuring KilojoulesHuman efficiency of 20 to 25% and 4.184 cancel out, so kJ ≈ kcal
• 13Ettema G, Lorås HW. Efficiency in cycling: a review. Eur J Appl Physiol. 2009;106(1):1-14Gross efficiency depends strongly on work rate, because of the baseline energy expenditure at zero work rate
• 14U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans, 2nd edition (2018): Executive SummaryWeekly activity recommendations for adults
• 15World Health Organization. WHO guidelines on physical activity and sedentary behaviour (2020)Adults: 150 to 300 minutes of moderate or 75 to 150 minutes of vigorous activity a week
• 16Celis-Morales CA, et al. Association between active commuting and incident cardiovascular disease, cancer, and mortality. BMJ. 2017;357:j1456263,450 people; cycling to work: all-cause mortality HR 0.59, cardiovascular disease 0.54, cancer 0.55

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