Calories Burned Indoor Cycling: Spin Class, Peloton, and Stationary Bike
How many calories does indoor cycling burn? Full tables by body weight and intensity. Covers spin class, Peloton, upright and recumbent bikes, and indoor vs outdoor calorie comparison.
Indoor cycling burns between 245 and 1,092 calories per hour, depending on body weight, bike type, and effort level. A 155 lb (70 kg) person cycling at moderate effort on an upright stationary bike burns approximately 476 calories per hour. In a structured spin class, the same rider burns approximately 476 to 630 calories per hour because the class format incorporates standing climbs, sprint intervals, and varied resistance that raises average intensity above steady-state pedalling.
The cycling calorie calculator gives personalised estimates across all indoor cycling formats. For the full context of how indoor output compares to outdoor cycling and other exercise formats, the cycling hub covers all formats together.
How Many Calories Does Indoor Cycling Burn?
Indoor cycling calorie output depends on four variables: body weight, session intensity (watts or effort level), bike type, and duration. The 2024 Adult Compendium of Physical Activities assigns specific MET codes to stationary cycling at different wattage bands, spin classes, and HIIT cycling formats. This makes indoor cycling one of the most precisely catalogued activities in the Compendium.
The basic formula is: Calories = MET × body weight (kg) × duration (hours)
MET values for indoor cycling span a wide range from MET 3.5 for very light pedalling (under 50 watts) to MET 12.0 and above for very vigorous effort at 200+ watts.
Indoor Cycling Calories Per Hour by Intensity
Intensity is the largest lever for increasing indoor cycling calorie output. Doubling from moderate effort (MET 6.8) to very vigorous effort (MET 12.0) nearly doubles calories per hour for the same body weight and session length.
Indoor Cycling Calories Per Hour by Body Weight and Intensity
Body Weight | Moderate (MET 6.8) | Vigorous (MET 8.8) | Very Vigorous (MET 12.0) |
|---|---|---|---|
120 lb (54 kg) | 367 kcal | 475 kcal | 648 kcal |
140 lb (64 kg) | 435 kcal | 563 kcal | 768 kcal |
155 lb (70 kg) | 476 kcal | 616 kcal | 840 kcal |
165 lb (75 kg) | 510 kcal | 660 kcal | 900 kcal |
185 lb (84 kg) | 571 kcal | 739 kcal | 1,008 kcal |
200 lb (91 kg) | 618 kcal | 800 kcal | 1,092 kcal |
215 lb (97 kg) | 664 kcal | 860 kcal | 1,170 kcal |
Source: 2024 Adult Compendium of Physical Activities.
A 185 lb person at vigorous indoor cycling effort (MET 8.8) burns approximately 739 calories per hour. Raising intensity to very vigorous (MET 12.0) for the same rider produces 1,008 calories per hour a level that approaches competitive outdoor cycling output.
Spin Class Calories Burned
Spin class carries a dedicated MET value of 9.0 in the 2024 Compendium, higher than a standard moderate stationary session (MET 6.8) because the structured class format sustains higher average intensity. Instructors incorporate standing climbs, sprints, intervals, and cadence drills that prevent the steady-state adaptation that reduces calorie burn in unstructured sessions.
Spin Class Calories by Duration and Body Weight
Body Weight | 30-Min Spin | 45-Min Spin | 60-Min Spin |
|---|---|---|---|
120 lb (54 kg) | 257 kcal | 386 kcal | 514 kcal |
140 lb (64 kg) | 306 kcal | 459 kcal | 612 kcal |
155 lb (70 kg) | 338 kcal | 508 kcal | 677 kcal |
165 lb (75 kg) | 338 kcal | 506 kcal | 675 kcal |
185 lb (84 kg) | 378 kcal | 567 kcal | 756 kcal |
200 lb (91 kg) | 410 kcal | 614 kcal | 819 kcal |
215 lb (97 kg) | 439 kcal | 659 kcal | 879 kcal |
MET 9.0, 2024 Compendium for spin class format.
A 155 lb rider in a 45-minute spin class burns approximately 508 calories. A 45-minute moderate stationary ride at the same body weight burns approximately 357 calories making the structured class 42% more efficient for calorie burn over the same session length.
Standing climbs within a spin class add approximately 12 to 15% more calories per 10-minute climbing segment versus seated spinning at the same resistance level. A 60-minute class with 20 minutes of standing efforts burns approximately 10 to 15% more than a 60-minute seated steady-state session at the same average resistance.
Peloton Calories Burned
Peloton and similar smart bike classes incorporate heart rate data alongside wattage in their calorie displays. However, the Peloton calorie algorithm relies partly on heart rate, a metric the 2024 Compendium explicitly excludes from calorie calculations due to its high interindividual variability. Heart rate can be elevated by caffeine, dehydration, heat, and stress without any change in actual calorie burn.
Independent analyses (Bikingbro, 2026; BodySpec, 2026) find that Peloton calorie displays overestimate actual output by approximately 15 to 25% for most riders. This overestimation tends to be larger for lighter riders and smaller for heavier riders, because the Peloton algorithm uses a weighted formula that assumes a certain baseline body weight.
Realistic Peloton Calorie Estimates vs Machine Display (30 Min, MET 9.0)
Body Weight | MET-Based Estimate (Realistic) | Typical Peloton Display | Overestimate |
|---|---|---|---|
120 lb (54 kg) | 257 kcal | 310 to 340 kcal | +21 to 32% |
155 lb (70 kg) | 338 kcal | 390 to 420 kcal | +15 to 24% |
185 lb (84 kg) | 378 kcal | 420 to 450 kcal | +11 to 19% |
For weight loss planning purposes, use MET-based estimates anchored to your actual body weight rather than Peloton's displayed figures. The stationary bike-specific reference is on the stationary bike calories page.
Indoor Cycling Calories by Wattage
Riders with a power meter or smart trainer have the most accurate input for calorie calculation. The 2024 Compendium provides wattage-specific MET entries for stationary cycling, unique among all activities in the database.
Indoor Cycling Calories Per Hour by Wattage (155 lb / 70 kg)
Watts | MET | Calories Per Hour | 30-Min Calories | 45-Min Calories |
|---|---|---|---|---|
Under 50W | 3.5 | 245 kcal | 122 kcal | 184 kcal |
75W | 5.5 | 385 kcal | 192 kcal | 289 kcal |
100W | 6.8 | 476 kcal | 238 kcal | 357 kcal |
125W | 8.0 | 560 kcal | 280 kcal | 420 kcal |
150W | 8.8 | 616 kcal | 308 kcal | 462 kcal |
175W | 10.0 | 700 kcal | 350 kcal | 525 kcal |
200W+ | 12.0 | 840 kcal | 420 kcal | 630 kcal |
2024 Compendium wattage-specific MET entries.
A rider holding 125 watts for 45 minutes burns approximately 420 calories. Increasing to 150 watts for the same 45 minutes raises output to 462 calories a 10% increase from a 20% power increase. The diminishing returns at higher wattages reflect the relationship between MET increase and session time.
Recumbent Bike Calories Burned
Recumbent bikes burn approximately 12 to 15% fewer calories than upright bikes at the same wattage because the reclined position removes core muscle engagement from the pedalling motion. At moderate effort, a 155 lb rider burns approximately 406 to 416 kcal per hour on a recumbent versus 476 kcal on an upright.
Recumbent vs Upright Indoor Bike (155 lb / 70 kg, Per Hour)
Bike Type | MET | Calories Per Hour |
|---|---|---|
Recumbent, moderate | 5.8 | 406 kcal |
Upright stationary, moderate | 6.8 | 476 kcal |
Recumbent, vigorous | 7.5 | 525 kcal |
Upright stationary, vigorous | 8.8 | 616 kcal |
The 12 to 15% calorie reduction on a recumbent is real, but the lower stress on the lower back and hip flexors often allows recumbent riders to sustain longer sessions. A 60-minute moderate recumbent session burns approximately 406 kcal, versus a 45-minute vigorous upright session at 462 kcal both are meaningful training outputs achieved through different session designs.
Indoor vs Outdoor Cycling: Calorie Comparison
Indoor cycling burns 5 to 12% fewer calories per minute than outdoor cycling at the same perceived effort. The three reasons are: wind resistance (absent indoors), variable terrain (absent indoors), and balance adjustments (minimal indoors). At the same wattage output, indoor and outdoor cycling produce identical calories because wattage is wattage regardless of environment.
Indoor vs Outdoor Cycling (30 Min, 155 lb / 70 kg)
Format | MET | Calories in 30 Min |
|---|---|---|
Indoor, light (under 50W) | 3.5 | 122 kcal |
Outdoor leisure (under 10 mph) | 4.0 | 140 kcal |
Indoor, moderate (100W) | 6.8 | 238 kcal |
Outdoor, moderate (12 to 14 mph) | 8.0 | 280 kcal |
Spin class, structured | 9.0 | 315 kcal |
Indoor, vigorous (150W) | 8.8 | 308 kcal |
Outdoor, vigorous (14 to 16 mph) | 10.0 | 350 kcal |
Indoor, very vigorous (200W+) | 12.0 | 420 kcal |
Indoor cycling at a very vigorous effort (200W+) produces 420 kcal in 30 minutes 20% more than moderate outdoor cycling (280 kcal) in the same time. This confirms that effort level and resistance matter far more than the indoor/outdoor distinction for maximising calorie output.
For the 30-minute and 1-hour outdoor cycling data at matched speeds, see the 30-minute cycling page and the 1-hour cycling page.
Indoor Cycling for Weight Loss: Weekly Planning
Indoor cycling provides a convenient, weather-independent calorie burn suitable for consistent weekly scheduling. The table below shows weekly outputs for a 155 lb rider at different class intensities.
Weekly Indoor Cycling Calorie Output (155 lb)
Format | Per Session | 3x/Week | 5x/Week |
|---|---|---|---|
30 min moderate stationary | 238 kcal | 714 kcal | 1,190 kcal |
45 min spin class | 508 kcal | 1,524 kcal | 2,540 kcal |
60 min moderate stationary | 476 kcal | 1,428 kcal | 2,380 kcal |
60 min vigorous stationary | 616 kcal | 1,848 kcal | 3,080 kcal |
Three 45-minute spin classes per week produce approximately 1,524 weekly calories for a 155 lb rider, equivalent to approximately 1.7 lb of monthly fat loss from exercise alone. Five sessions per week crosses 2,540 weekly calories, supporting approximately 2.9 lb of monthly fat loss.
To see how indoor cycling fits within your full daily energy balance, the TDEE calculator produces your personalised maintenance calorie target. The calories burned calculator covers all activity types for mixed-exercise weeks.
Trail riders can check the mountain biking calories page for off-road calorie data.
How Do You Maximise Calorie Burn in an Indoor Cycling Session?
Six evidence-based strategies for increasing indoor cycling calorie output per session:
Use resistance, not just speed: Spinning the pedals fast at low resistance feels intense but produces low wattage. Moderate cadence (80 to 90 RPM) at high resistance generates more watts and burns more calories.
Track watts, not calories: Bike displays overestimate calories by 20 to 30%. Tracking watts instead gives a more reliable measure of effort intensity and training progression.
Add standing climbs: Each 10-minute standing climb segment in a session adds approximately 12 to 15% more calories than the same 10 minutes seated at matching resistance.
Incorporate interval efforts: 4 minutes hard, 2 minutes easy, repeated 6 times, produces significantly higher average MET than 24 minutes at steady moderate pace for the same total session length.
Extend session length: The relationship between session length and calories is exactly linear at fixed intensity. Adding 15 minutes to a 30-minute moderate session (MET 6.8) adds exactly 50% more calories.
Use the right bike type: Spin bikes and upright bikes burn more per hour than recumbent bikes at the same effort level. At moderate effort, upright bikes produce approximately 12 to 15% more calories per session than recumbents.
The main calories burned guide shows how indoor cycling compares to running, swimming, hiking, and HIIT across matched session lengths.
Frequently Asked Questions About Calories Burned Indoor Cycling
How Many Calories Does Indoor Cycling Burn?
Indoor cycling burns between 245 and 1,092 calories per hour, depending on body weight and intensity. A 155 lb (70 kg) person at moderate effort (MET 6.8) burns approximately 476 calories per hour. In a 45-minute spin class (MET 9.0), the same person burns approximately 508 calories. At very vigorous effort (200W+, MET 12.0), the 1-hour output reaches 840 calories.
How Many Calories Does a Spin Class Burn?
A 45-minute spin class burns approximately 289 to 659 calories, depending on body weight. A 155 lb person burns approximately 508 calories in 45 minutes of spin class at MET 9.0. A 200 lb rider burns approximately 614 calories in the same class. A 60-minute spin class burns approximately 677 to 879 calories across the 155 to 215 lb range.
Does Indoor Cycling Burn as Many Calories as Outdoor Cycling?
Indoor cycling burns approximately 5 to 12% fewer calories than outdoor cycling at the same perceived effort. At the same wattage output, indoor and outdoor cycling produce identical calories. Maximum indoor cycling effort (200W+, MET 12.0) exceeds moderate outdoor cycling output (MET 8.0) by approximately 50%, confirming that indoor resistance levels matter more than the indoor/outdoor distinction.
Are Peloton Calorie Numbers Accurate?
Peloton calorie displays overestimate actual output by approximately 15 to 25% for most riders, based on independent comparisons between Peloton displays and MET-based calculations. The overestimation is larger for lighter riders. MET-based estimates anchored to actual body weight (as shown in the tables above) produce more accurate figures for weight loss planning.