Key Takeaways
- Pace (min/km or min/mi) is the inverse of speed and is calculated as: Pace = 60 / Speed. At 30 km/h, pace is 2:00 min/km.
- Cycling pace is less commonly used than running pace, but it is valuable for pacing time trials and planning event logistics.[1]
- The race estimator shows projected finish times across five standard cycling distances — from 10 km to a full century (100 mi / 160 km).
Speed vs. Pace
Speed tells you how far you travel per unit of time (e.g., 30 km/h). Pace tells you how long each unit of distance takes (e.g., 2:00 min/km). They are reciprocal: doubling your speed halves your pace.
Pace (min/km) = 60 / Speed (km/h)
Speed (km/h) = 60 / Pace (min/km)
For time-distance-speed calculations, see the Cycling Time Calculator. To estimate what power output corresponds to your target speed, check the Cycling Power-to-Weight Calculator.
Practical Application
Use the race estimator to set realistic time goals for events. If you average 28 km/h on training rides, the calculator shows you can expect a 40 km time trial in approximately 1h 25m.
Pace-based training can also be useful for triathletes transitioning between run and bike segments, where pacing consistency matters. For structured training zones, combine this with your FTP to build a power-based training plan.
Accuracy and Limitations
- Pace calculations assume constant speed. Real rides involve variable pacing due to terrain, wind, and traffic.
- Century and metric century times assume sustained average speed — actual times include stops, descents, and fatigue.
- Wind, elevation changes, and road surface significantly affect achievable pace.[2]
- This calculator provides informational estimates for ride planning and personal awareness.
Frequently Asked Questions
Sources & References
- Cycling Speed Variation: A Multilevel Model of Characteristics of Cyclists, Trips, and Route Tracking Points. Félix R, Moura F, Clifton KJ. Transportation Research Record (2024)
- Bicycle Speed: A Literature Review. Various. J.S. Held LLC Technical Report (2023)

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