There is no universal cycling-to-running conversion ratio. “One running mile equals three cycling miles” can be a café shorthand, but it cannot survive changes in cycling speed, gradient, wind, surface or drafting.
The better question is: what are you trying to match? Energy cost, aerobic exposure, tissue load, recovery and race preparation are not the same outcome.
Use the cycling-to-running conversion calculator for a transparent population-average energy-cost estimate. Use this guide for the chart, method and limits around that output.
Cycling to running conversion chart
Roadman's calculator uses MET values from the 2024 Adult Compendium of Physical Activities. A MET is a standardised activity-energy-cost unit. MET-minutes are:
MET-minutes = activity MET × duration in minutes
To match that exposure in the other sport:
target minutes = source MET-minutes ÷ target activity MET
For a 30-minute run at 6 mph, the Compendium assigns 9.3 MET. That creates 279 MET-minutes. The results below show how the same energy-cost estimate changes with the selected ride category:
| Target cycling category | MET | Matched time | Approximate distance |
|---|---|---|---|
| 9.4 mph leisure | 5.8 | 48 min | 7.5 miles / 12.1 km |
| 10 mph | 6.8 | 41 min | 6.8 miles / 10.9 km |
| 12 mph | 8.0 | 35 min | 7.0 miles / 11.2 km |
| 14 mph | 10.0 | 28 min | 6.5 miles / 10.5 km |
| 16 mph | 12.0 | 23 min | 6.2 miles / 10.0 km |
The distance does not climb in a simple ratio because a faster cycling category also carries a higher MET value. That is exactly why “one mile equals three” is too blunt.
These are energy-cost matches only. They are not equal training prescriptions.
What cycling distance equals a 5K run?
Take a 5K run completed at 6 mph, or 10 minutes per mile:
- 5K is 3.107 miles.
- At 6 mph, it takes about 31.1 minutes.
- The running category is 9.3 MET, producing about 289 MET-minutes.
- At the 12 mph cycling category, rated 8.0 MET, the match takes about 36.1 minutes.
- At 12 mph, that covers about 7.2 miles or 11.6 km.
So the answer for this specific energy-cost example is approximately 11.6 cycling kilometres. Change either speed category and the answer changes. It does not mean an 11.6 km ride prepares the legs for a 5K race.
Why the 1:3 distance rule breaks
Cycling distance is unusually sensitive to context. The same rider can cover kilometres quickly in a group, downhill or with a tailwind while producing little work. A climb can produce high work and almost no distance. The official 2024 activity table assigns cycling MET values from 5.8 at a 9.4 mph leisure pace to 16.8 above 20 mph when not drafting.
Running cost also changes with speed, surface and gradient, but running distance does not include coasting or drafting. The same table assigns 9.3 MET at 6 mph, 11.8 at 7.5 mph and 14.8 at 10 mph.
A fixed distance ratio silently assumes the source speed, target speed, terrain and the outcome being matched. If those assumptions are not visible, the precision is fictional.
Why Roadman removed the FTP and VDOT conversion
The previous Roadman tool predicted cycling FTP from a running pace and running race performance from FTP. That model was not defensible.
It used the equation VO2 = 10.8 × watts ÷ body mass + 7 as though FTP could directly produce VO2max. That equation estimates the oxygen cost of leg cycling at a work rate; it does not establish FTP as maximal aerobic power. The tool then applied fixed cross-mode and duration factors that were coaching approximations rather than validated individual conversions.
Running and cycling responses are modality-specific. A review of triathletes and single-sport athletes found that VO2max, threshold, heart rate, economy, muscle recruitment and fatigue can differ by exercise mode and training history (Millet et al., 2009).
The safe boundary is straightforward:
- set FTP with a cycling-specific method;
- set running pace and threshold from running-specific observations;
- use a cross-sport calculation only for the metric its source supports; and
- label population estimates as estimates.
Equal energy cost is not equal training load
MET-minutes answer a useful but narrow question. They do not reproduce:
- running impact and eccentric muscle loading;
- cycling-specific torque, position and neuromuscular skill;
- sport-specific economy or efficiency;
- symptoms, soreness or recovery time;
- threshold-relative intensity for the individual; or
- the technical and psychological demands of the target event.
Training-load metrics are not interchangeable magic either. In a 2026 outdoor-running study, subjective, physiological and biomechanical load measures showed only weak-to-moderate relationships and appeared to capture different aspects of load (PMID 41758294). Matching one number does not match the whole session.
What the cross-training evidence actually says
A 2026 systematic review and meta-analysis included seven randomised trials comparing running-only, cycling-only or combined interventions. It found no statistically significant between-group differences for the assessed VO2max and running-performance outcomes, but the confidence intervals were wide and the evidence was limited and heterogeneous. The authors explicitly said the result did not establish interchangeability (Menges et al., 2026).
That supports a measured conclusion: cycling can be a useful cross-training mode, and running can contribute transferable central aerobic work, but neither becomes the other. Use the fitness-transfer guide for that broader question.
When a conversion is useful
A conversion can help when:
- a runner wants a rough lower-impact energy-cost reference for an aerobic ride;
- a cyclist is adding a short run and needs to avoid treating it as “free” load;
- a triathlete is checking the scale of two steady sessions; or
- a coach wants to show why the selected speeds change the result.
It is not the deciding tool when:
- an injury or return-to-run decision is involved;
- the session develops race-specific pace, economy or tissue tolerance;
- terrain, wind or drafting makes road speed a poor description of work; or
- symptoms and recovery disagree with the estimate.
For marathon preparation, read whether cycling can replace the long run. For weekly integration, use the running and cycling schedule guide.
Which Roadman page should you use?
- Use the conversion calculator for a disclosed MET-minute energy-cost calculation.
- Use this guide for the conversion chart, method and evidence limits.
- Use how many minutes of cycling equals running for the short answer.
- Use running for cyclists for adding running to a cycling programme.
- Use cycling for runners when the bike is supporting a running goal.
These pages have different jobs. Keeping them separate prevents a rough calculation from becoming an unsupported performance prediction.
Sources and review notes
- 2024 Adult Compendium of Physical Activities — update methods, scope and MET definition;
- Official 2024 activity-code table — running and bicycling values used in the examples and calculator;
- Cross-training between running and cycling — 2026 systematic review and meta-analysis;
- Physiological differences between cycling and running — mode-specific physiology review; and
- Do Training Load Metrics Agree? — comparison of subjective, physiological and biomechanical running load.
This article was reviewed on 26 August 2026. The review covered every MET value used, the worked arithmetic, the old tool's formula boundary, cross-training conclusions and the distinction between energy cost, training load and specificity.
Frequently asked questions
How many cycling miles equal one running mile?
There is no universal number. Select both speed categories and calculate the metric you actually want to match. Roadman's tool matches population-average MET-minutes, not impact or race fitness.
What cycling distance is equivalent to a 5K run?
For the worked example of a 5K at 6 mph matched to the 12 mph cycling category, the energy-cost result is about 7.2 miles or 11.6 km. Different speeds produce a different result.
Can I convert a run time into FTP?
Not defensibly with one universal formula. Test or estimate FTP with a cycling-specific method and keep running metrics sport-specific.
Does equal MET-minutes mean equal recovery?
No. MET-minutes do not include impact, eccentric loading, individual economy, symptoms or recovery. Treat the output as one planning reference.
Can cycling replace a run during injury rehabilitation?
That is a clinical and programme decision, not a calculator output. Cycling may provide lower-impact aerobic work, but it does not reproduce running tissue load or determine readiness to run.
Calculate a transparent starting point with the cycling-to-running conversion calculator, then adjust it around the athlete, session purpose and target event.