Run Walk Calculator FAQ

What does this run walk calculator do?

It estimates finish time, average pace, total run time, total walk time, and the number of run/walk cycles based on your run interval, walk interval, run pace, and walk pace. It includes common distances from 1K through 100 miles.

Can I use this for marathon or ultra run/walk planning?

Yes. The calculator includes the half marathon, marathon, 50K, 50 mile, 100K, and 100 mile. You can test different intervals, paces, stop time, and terrain adjustments to compare possible finish times.

For a practical example, see how walk pace changes run/walk finish time.

Why is the average pace not just the average of my run pace and walk pace?

Because the running portion usually covers more distance than the walking portion. For example, 5:00 running at 12:00 per mile and 5:00 walking at 18:00 per mile does not average to 15:00 per mile. The combined average pace is 14:24 per mile because more distance is covered during the faster running segment.

Should I use time intervals or distance intervals?

Time intervals are usually easier if you are following a watch timer, such as 5:00 run / 5:00 walk or 4:00 run / 1:00 walk. Distance intervals are useful if you prefer repeating a set distance, such as running 0.50 miles and walking 0.25 miles. The calculator supports both.

Can I use kilometers instead of miles?

Yes. Use the Miles/Kilometers toggle. In kilometer mode, distances are shown in kilometers, pace is shown per kilometer, and speed is shown in kph.

Why does my finish time change when I add stop time?

Extra stop time is added per mile or kilometer to estimate things like aid stations, water stops, gear checks, traffic lights, bathroom breaks, or other pauses. Even small stop times can add up over long distances.

What does the terrain adjustment do?

The terrain adjustment applies a simple percentage increase to the estimated finish time. It is meant as a rough planning tool for comparing road, trail, hillier, or more technical routes. It is not a perfect prediction.

Is this coaching or training advice?

No. This is a planning calculator, not coaching, medical, or training advice. It helps compare pacing scenarios, but actual results can vary based on fitness, weather, terrain, fueling, effort, and race-day conditions.