How is combined run/walk pace calculated?
The calculator converts each pace into distance covered during its interval, adds the distances, then divides the full cycle time by that distance. Simply averaging two pace values gives the wrong result.
Interval strategy arithmetic
Ultramarathon Run/Walk Calculator
Calculate the actual pace of a repeating run/walk cycle, estimate a distance finish, or project distance across a timed event.
Run/walk scenario
Compare true cycle pace instead of averaging the two pace numbers.
Printable strategy comparison
Run 4 min / Walk 1 min
Paces entered per km
Effective moving pace
7:27/km
Calculated from distance covered in each cycle
Projected finish
12h 55m
30 minutes of other stops included
Moving time
12h 25m
Time running
9h 56m
Interval-time share, not continuous running
Time walking
2h 29m
Interval-time share
Approximate cycles
148.9
5 minutes per full cycle
| Ratio | Effective pace | Projected finish | Walk interval |
|---|---|---|---|
| 1:1 | 8:14/km | 14h 14m | 1 min |
| 2:1 | 7:47/km | 13h 28m | 1 min |
| 3:1 | 7:34/km | 13h 7m | 1 min |
| 4:1 | 7:27/km | 12h 55m | 1 min |
| 5:1 | 7:22/km | 12h 47m | 1 min |
| 9:1 | 7:13/km | 12h 32m | 1 min |
The comparison holds run and walk paces constant. In practice, a different ratio may change both paces, fatigue and transition behavior. Test any strategy in training and adjust for terrain and conditions.
Why the Simple Average Is Wrong
Pace is time per unit of distance. A four-minute run and one-minute walk cover unequal distances, so averaging the two pace numbers gives the wrong combined result. This tool calculates the distance inside each full cycle first.
Use Ratios as Scenarios
The comparison table holds the entered running and walking paces constant while changing the interval ratio. Real paces may change with a different strategy. Use the walking strategy guide to connect the numbers with terrain, effort and late-race decision making.
Frequently Asked Questions
Does walking time count as moving time?
Yes. Planned walking is movement. Aid-station, foot-care and other stationary time is entered separately in distance mode or as non-moving time in timed-event mode.
Can this predict my ultramarathon finish?
No. It calculates a constant mathematical scenario. Terrain, fatigue, heat, darkness, nutrition, stops and physical symptoms can change both running and walking pace.
Which run/walk ratio is best?
There is no universal best ratio. Compare the arithmetic, then test realistic options in long training sessions on similar terrain without turning the fastest calculated row into a prescription.