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Formula

The calculator above works out your average running pace and speed from a finish time and distance. The formulas are:

• Pace (min/km) = Finish time in minutes ÷ Distance in km
• Speed (km/h) = Distance in km ÷ (Finish time in minutes ÷ 60)

Variables: t = finish time (minutes), d = distance (km). Pace is the number of minutes it takes to cover one kilometre; speed is how many kilometres you cover in one hour. The same formulas work for miles if you enter distance in miles and read pace as min/mile.

Worked Example

Using the default values from the calculator: finish time = 50 minutes, distance = 10 km.

1. Pace = 50 ÷ 10 = 5.00 min/km
2. Speed = 10 ÷ (50 ÷ 60) = 10 ÷ 0.8333 = 12.00 km/h

So a 50-minute 10 km run means an average pace of 5:00 per kilometre and an average speed of 12 km/h. The calculator rounds both to two decimal places, giving 5.00 min/km and 12.00 km/h.

When to Use This Calculator

Use this tool when you want to know your training pace for a specific race distance, or when you need to convert a finish time into a speed for a training log, race entry, or comparison with other runs. It is also handy for planning: if you know your target pace, you can work backwards to estimate a finish time. The result is an average – real running pace varies with hills, wind, and fatigue, so treat the number as a planning figure, not a precise prediction.

How to Read the Result

A lower pace number means faster running (fewer minutes per kilometre). A higher speed number also means faster running. For example, 4:30 min/km is faster than 5:00 min/km, and 13.3 km/h is faster than 12.0 km/h. If you train in miles, the same logic applies: 7:00 min/mile is faster than 8:00 min/mile. The pace value is what most runners quote because it directly reflects effort per distance unit.

Common Mistakes

• Mixing units: Entering distance in miles but expecting min/km pace gives wrong numbers. Keep both inputs in the same unit system.
• Using seconds instead of minutes: If you enter 50 seconds instead of 50 minutes, the pace becomes unrealistically fast. Convert total time to minutes first (e.g., 1:30:00 = 90 minutes).
• Rounding too early: Rounding the pace before calculating speed can shift the second result slightly. The calculator handles both internally, so you don’t need to.
• Ignoring rest or stops: The formula assumes continuous movement. If you stopped for water or traffic lights, the actual moving pace is faster than the overall average.

Limitations of the Formula

The pace and speed formulas are simple averages. They do not account for elevation gain, surface type, weather, or interval training. For a hilly route, your average pace will be slower than on flat ground even at the same effort. The formula also cannot tell you your maximum speed or anaerobic threshold – those require a heart rate monitor or GPS data. Use this calculator for general planning and logging, not for precise physiological training zones.

Frequently Asked Questions

Is 5:00 min/km a good pace?

For a recreational runner, 5:00 min/km (12 km/h) is a solid, above-average pace. It corresponds to a 50-minute 10 km and about a 1:45 half marathon. Elite runners run much faster (under 3:00 min/km for 10 km), but for most hobby runners, sub-5:00 is a common goal.

How do I convert min/km to min/mile?

Multiply the min/km value by 1.609. For example, 5:00 min/km × 1.609 = 8:03 min/mile. To go the other way, divide the min/mile value by 1.609. The calculator gives you km-based results; for miles, simply enter distance in miles and read the pace as min/mile directly.

What is a good pace for a beginner?

A beginner running a 5 km might finish in 30–40 minutes, which is 6:00–8:00 min/km. For a 10 km, 60–70 minutes (6:00–7:00 min/km) is common. The key is to run at a conversational effort – if you can’t speak in short sentences, slow down.

Does the calculator work for walking?

Yes. Enter your walking time and distance, and the same formulas give your walking pace and speed. Typical walking pace is 10–15 min/km (4–6 km/h). The calculator doesn’t distinguish between running and walking – it just divides time by distance.

How do I find my target pace for a race?

Take a recent race or hard time trial over a similar distance, enter it in the calculator to see your current pace, then adjust slightly. For a longer race, add 10–20 seconds per km to your current 5 km pace. For a shorter race, subtract a few seconds. The calculator helps you see the numbers, but your actual race pace also depends on training and conditions.

Why does my GPS watch show a different pace?

GPS watches calculate pace from real-time position updates, which include every second of movement and often account for elevation changes and pauses. The calculator gives a simple arithmetic average from total time and total distance. Differences of a few seconds per km are normal, especially on winding routes or in cities where GPS accuracy drops.

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in t | Finish time | min | 50 | 0
in d | Distance | km | 10 | 0
out pace | Average pace | min/km | t / d | 2
out speed | Average speed | km/h | d / (t / 60) | 2