Bike Cadence Calculator
Enter your wheel size, tire size, chainring teeth, and cog teeth, then type either your target speed or your target cadence and the other value is calculated instantly. Switch between km/h and mph. The chart below shows how cadence changes across a range of speeds for your exact gear setup.
What is cycling cadence?
Cadence is the number of complete pedal revolutions per minute (RPM) you make while riding. It is one of the three key variables that determine cycling speed, alongside gear ratio and wheel size. A 90 RPM cadence means your right foot completes 90 full circles every minute. Most road cyclists target a cadence between 80 and 100 RPM for sustained efforts because this range minimises muscular fatigue while keeping aerobic effort manageable.
How cadence, gear ratio, and speed are related
Speed is the product of how fast you spin the pedals and how far the bike moves per pedal revolution. That second value, sometimes called rollout or gear development, is the wheel circumference multiplied by the gear ratio (chainring teeth / cog teeth). The full formula is: Speed (km/h) = cadence (RPM) x rollout (m) x 60 / 1000. Doubling your cadence while keeping your gear fixed doubles your speed. Moving to a larger chainring or a smaller cog also increases rollout and speed for the same cadence.
Choosing the right cadence for your riding
Research consistently shows that trained cyclists are most efficient between 80 and 100 RPM on flat terrain. Below 70 RPM, muscular stress rises sharply, increasing the risk of knee damage. Above 110 RPM for long periods, cardiovascular demand rises without proportional propulsive benefit for most riders. Beginners often settle naturally around 60-70 RPM because it feels easier to push a bigger gear; gradually training your cadence upward to 80-90 RPM typically improves both speed and endurance. Mountain biking and technical climbs naturally call for lower cadences, and track sprinters briefly reach 130 RPM or higher.
How to read the gear ratio and rollout outputs
The gear ratio tells you how many times the rear wheel rotates for each pedal revolution. A 50/17 combination gives a ratio of 2.94: the wheel spins nearly 3 times per pedal stroke. Rollout (gear development) converts that ratio into real distance by multiplying by the wheel circumference. For a 700c wheel with 25 mm tires, a 50/17 gear gives a rollout of roughly 5.67 m per revolution, meaning at 90 RPM you travel about 510 m every minute, or 30.6 km/h. Use rollout to compare gear setups across different wheel sizes, which gear ratio alone cannot tell you.
Cadence zones and what they mean
| Cadence (RPM) | Zone | Typical use case | Joint stress |
|---|---|---|---|
| Below 60 | Grinding | Steep hill climbs, beginner cyclists | Very high |
| 60-69 | Low | Strength-focused training, heavy loads | High |
| 70-79 | Moderate | Recreational / leisure cycling | Moderate |
| 80-89 | Optimal | Endurance road cycling, sportive pace | Low |
| 90-99 | High | Racing, criteriums, fast group rides | Low |
| 100-119 | Very high | Sprint lead-outs, track cycling | Low (short efforts) |
| 120+ | Extreme | Track sprint, motor-paced | Technique-dependent |
General guidelines used by cycling coaches. Individual optimal cadence varies with fitness, terrain, and bike fit.
Frequently asked questions
What cadence should I aim for as a beginner?
Most coaches recommend starting at 70-80 RPM and gradually working toward 85-95 RPM over several months. Beginners often prefer lower cadences because pushing a heavier gear feels powerful, but higher cadences reduce joint stress and are more sustainable on longer rides. Try setting a metronome or using a cycling computer that displays cadence and consciously matching it for the first few minutes of each ride.
Does a higher cadence always mean a faster speed?
Not by itself. Speed depends on both cadence and gear ratio. You can spin at 110 RPM in an easy gear and go slower than someone turning 70 RPM in a big gear. What a higher cadence does is shift the workload from your muscles to your cardiovascular system, which recovers faster during a ride. To go faster you need to raise cadence, shift to a harder gear, or both.
Why does cadence matter for knee health?
Each pedal stroke applies force to the knee joint. At a low cadence you generate more force per stroke to maintain speed; at a higher cadence you apply less force per stroke but repeat it more times per minute. Studies show that very low cadences (below 60 RPM) significantly increase patellofemoral joint stress, which over time can contribute to overuse injuries. Keeping cadence above 70-80 RPM is generally protective for the knee.
How does wheel size affect cadence calculations?
A larger wheel travels further per revolution, so at the same gear ratio and cadence, a bike with 700c wheels goes faster than one with 26 inch wheels. This calculator accounts for wheel size through the circumference formula: circumference = pi x (wheel diameter + 2 x tire width). If you are comparing cadence between different bikes, even the same speed and gear ratio will produce different RPMs if the wheel sizes differ.
What is gear development (rollout) and how is it used?
Gear development, also called rollout, is the distance in metres your bike travels for one complete pedal revolution in a given gear. It equals the wheel circumference multiplied by the gear ratio (chainring / cog). Rollout is the best way to compare gear "hardness" across different wheel sizes because a 50/17 gear on a 700c road bike and a 34/12 gear on a 29 inch mountain bike have different rollouts even if their ratios are similar.
How do professional cyclists achieve such high cadences?
Elite road cyclists, particularly climbers and time triallists, commonly sustain 95-105 RPM. Track sprinters peak above 130 RPM during match sprints. High cadences require highly trained neuromuscular coordination so that power is applied smoothly throughout the full pedal circle, including the upstroke. Professional riders develop this through years of structured training, bike fitting, and technique drills such as single-leg pedalling and spin-ups.