Can’t Extract ZIP Files? Fixes That Work

If you can’t extract a ZIP file, the cause is usually a corrupted download, a filename or path that is too long, or a permissions problem — and most of the time you can fix it yourself in a few minutes. Below are the exact steps to try on Windows, macOS, and Android, plus what to do when the file itself is genuinely damaged.

Formula

This calculator works out your average pace and speed for a run, walk, or ride. You enter the total time in minutes and the distance in kilometers, and it returns your pace in minutes per kilometer and your speed in kilometers per hour.

The formulas are:

• Pace (min/km) = total time (min) ÷ distance (km)
• Speed (km/h) = distance (km) ÷ (total time (min) ÷ 60)

Where:

• t = total time in minutes (e.g., 50 min)
• d = distance in kilometers (e.g., 10 km)

Worked Example

Using the default values: t = 50 minutes, d = 10 km.

First, calculate pace:

Pace = 50 ÷ 10 = 5.00 min/km

Then calculate speed:

Speed = 10 ÷ (50 ÷ 60) = 10 ÷ 0.8333 = 12.00 km/h

So the average pace is 5 minutes per kilometer, and the average speed is 12 kilometers per hour.

When to Use This Calculator

Use this tool when you want to know how fast you need to run to hit a target time, or when you want to compare your pace across different distances. It works for any activity where you measure time and distance — running, walking, cycling, or hiking.

You can also use it to plan a training pace: if you want to finish a 10K in under 50 minutes, you already know you need to hold a pace of about 5:00 min/km. The speed output is useful if you use a treadmill that shows km/h instead of pace.

How to Read the Results

The first output, pace, is the most common way runners measure effort. A lower pace number means faster — 4:30 min/km is faster than 5:00 min/km. The second output, speed, is simply the inverse: a higher number means faster.

Note that the pace is shown in decimal minutes (e.g., 5.50 means 5 minutes and 30 seconds, not 5 minutes and 50 seconds). To convert the decimal part to seconds, multiply by 60. For example, 5.50 min/km = 5 minutes + 0.50×60 = 5:30 per km.

Common Mistakes

• Mixing units: If you enter distance in miles but the calculator expects kilometers, your pace will be wrong. Convert miles to km by multiplying by 1.60934.
• Using seconds instead of minutes: Enter total time in minutes, not seconds. If you ran for 50 minutes and 30 seconds, enter 50.5, not 3030.
• Rounding too early: If you round the speed to 12.0 and then use that to recalculate pace, you may get a slightly different answer. Keep at least two decimal places in intermediate steps.

Limitations of the Formula

This calculator gives the average pace for the whole distance. It does not account for changes in terrain, elevation, stops, or wind. Your actual instantaneous pace will vary during the activity. For interval training or hilly routes, use a GPS watch or app that records per-kilometer splits.

The formula also assumes you maintain a constant speed. If you walk for part of the time and run for the rest, the average pace is still correct, but it won’t tell you how fast you were moving at any given moment.

Frequently Asked Questions

How do I convert pace to speed?

To convert pace (min/km) to speed (km/h), divide 60 by the pace. For example, a pace of 5 min/km equals 60 ÷ 5 = 12 km/h. Conversely, to convert speed to pace, divide 60 by the speed.

What is a good running pace for a beginner?

A comfortable conversational pace for a beginner is often between 6:00 and 8:00 min/km (7.5 to 10 km/h). This varies widely with age and fitness, so the best pace is one where you can talk without gasping.

Does this calculator work for walking?

Yes. Walking speed is usually between 4 and 6 km/h, which corresponds to a pace of 10 to 15 min/km. The same formula applies.

How do I calculate pace for miles?

If you want pace in minutes per mile, enter the distance in miles and the time in minutes, and the result will be min/mile. To convert min/mile to min/km, multiply by 0.621371. For example, 8 min/mile = 8 × 0.621371 = 4.97 min/km.

Why does my GPS watch show a different pace?

GPS watches calculate pace based on your actual moving path, which includes turns and elevation changes. They also update pace in real time, so the displayed number may fluctuate. Your overall average pace from the watch should match this calculator if the distance and time are the same.

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in t | Finish time | min | 50 | 0
in d | Distance | km | 10 | 0 | 100000
out pace | Average pace | min/km | t / d | 2
out speed | Average speed | km/h | d / (t / 60) | 2