# Free online running pace calculator

> Running pace is the time it takes to cover one mile or kilometer. Enter your time and distance to get pace, speed, and projected race finish times.

Calculate your running pace per mile or per kilometer, speed in mph and kph, and projected finish times for common race distances.

**Interactive version:** https://onlinecalculator.me/health/running-pace/
**Category:** Health

## How to use

1. Enter your run time (hours, minutes, seconds).
2. Enter the distance you ran.
3. Choose **min / mile** or **min / km** for your preferred pace unit.
4. Click **Calculate Pace**.
5. See your pace, speed in mph and kph, and projected finish times for four race distances.

## Formula

**Pace (min/unit) = Total time (min) ÷ Distance**

**Speed (mph) = 60 ÷ Pace (min/mile)**

**Speed (kph) = 60 ÷ Pace (min/km)**

**Projected finish (min) = Pace × Race distance**

## Worked example

**30 minutes for 3.107 miles (5K):**

- Pace = 30 ÷ 3.107 ≈ 9.657 min/mile → **9:39 per mile**
- Speed = 60 ÷ 9.657 ≈ **6.21 mph** (10.00 kph)
- Projected marathon = 9.657 × 26.219 ≈ **253.2 min → 4:13:12**

## Notes

Projected finish times assume a constant pace. Real race times slow with fatigue, especially in the half marathon and marathon. Use these projections as a starting point, not a guarantee.

## Frequently asked questions

### How is running pace calculated?

Pace equals total time in minutes divided by distance. For a 30-minute 5K (3.107 miles), pace = 30 ÷ 3.107 ≈ 9 minutes 39 seconds per mile.

### What is a good running pace?

It depends on the runner. Recreational runners often average 10–12 min/mile. Competitive runners aim for 6–8 min/mile. Elite marathoners run under 4:45 per mile. Run at a pace that feels comfortably challenging to you.

### How do I convert pace to speed?

Speed (mph) = 60 ÷ pace (min/mile). For a 10:00/mile pace, speed = 60 ÷ 10 = 6 mph. For kph, convert miles to km first or use speed (kph) = 60 ÷ pace (min/km).

### How are projected finish times calculated?

The calculator uses your current pace and multiplies by each race distance. This assumes you maintain the same pace throughout. A race prediction model (like Riegel's formula) would account for the fact that you slow slightly over longer distances.

### What are the standard race distances?

5K = 3.107 miles, 10K = 6.214 miles, half marathon = 13.109 miles (21.098 km), marathon = 26.219 miles (42.195 km).

## Sources

- [Competition and Technical Rules](https://worldathletics.org/about-iaaf/documents/book-of-rules) — World Athletics

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