Mirror Cleaning Mistakes: How to Clean Mirrors Right

Yes, you have likely been cleaning your mirrors wrong this whole time if you spray cleaner directly onto the glass and wipe in circles with paper towels. The correct method is to apply the cleaning solution to a microfiber cloth, not the mirror, and wipe in an S-pattern or top-to-bottom strokes to avoid streaks and drips.

Formula

The calculator above works out your average running pace and speed from a finish time and distance. The pace is the time it takes to cover one kilometer (or mile, if you enter miles), and the speed is the distance divided by the time in hours.

Pace (min/km) = Total time (minutes) ÷ Distance (km)

Speed (km/h) = Distance (km) ÷ (Total time (minutes) ÷ 60)

Variables: t = total time in minutes, d = distance in kilometers. The pace output is in minutes per kilometer, and the speed is in kilometers per hour.

Worked Example

Using the default values from the calculator: you run 10 km in 50 minutes.

1. Pace = 50 minutes ÷ 10 km = 5.0 min/km
2. Speed = 10 km ÷ (50 ÷ 60) = 10 ÷ 0.8333 = 12.0 km/h

The calculator shows an average pace of 5:00 min/km and an average speed of 12.0 km/h.

When to Use This Calculator

Use this calculator when you want to know your average pace for a training run, race, or commute. It is especially helpful for setting training zones, planning race strategies, or comparing runs of different distances. For example, if you run 5 km in 30 minutes, your pace is 6:00 min/km, which is a common easy-run pace for many recreational runners.

How to Read the Result

The pace result tells you how many minutes (and seconds) it takes you to cover one unit of distance. A lower pace number means faster running. The speed result is the equivalent in kilometers per hour (or miles per hour if you entered miles). For a 5:00 min/km pace, the speed is 12 km/h. Many runners think in pace, while cyclists and drivers think in speed, so this calculator gives you both.

Common Mistakes

• Mixing units: If you enter distance in miles but time in minutes, the pace will be in minutes per mile, not minutes per kilometer. Always check the units.
• Using seconds incorrectly: If your time is 50 minutes and 30 seconds, convert the seconds to a decimal (30 ÷ 60 = 0.5) and enter 50.5 minutes, not 50.30.
• Rounding too early: Rounding the pace to one decimal place before calculating speed can cause small errors. Keep full precision until the final step.

Limitations of the Formula

The formula assumes a constant speed throughout the entire distance. Real runs have hills, stops, and changes in pace, so the average pace is a simplification. It does not account for elevation gain, terrain, or fatigue. For interval training, you would need to calculate pace for each segment separately.

Frequently Asked Questions

How do I convert my pace from min/km to min/mile?

Multiply the pace in min/km by 1.60934 to get min/mile. For example, 5:00 min/km is about 8:03 per mile. Alternatively, enter the distance in miles into the calculator and it will give you min/mile directly.

What is a good running pace for a beginner?

A comfortable conversational pace for a beginner is often between 7:00 and 9:00 min/km (11:15 to 14:30 per mile). This varies widely based on age, fitness, and experience. Use the calculator to find your own easy pace by running a kilometer and timing it.

Why does my watch show a different pace than this calculator?

GPS watches measure pace in real-time, accounting for momentary changes in speed and often using rolling averages. This calculator gives the overall average pace for the entire run, which is the same as the watch’s average pace over the full distance, but the watch may display moving pace (excluding stops) or lap pace.

Can I use this calculator for walking or cycling?

Yes, the formula works for any activity where you cover a distance in a time. For walking, enter your walking time and distance to get your walking pace. For cycling, the speed output is useful, but cyclists often prefer speed over pace.

How do I convert my time from hours and minutes to minutes?

Multiply the hours by 60 and add the minutes. For example, 1 hour 25 minutes = (1 × 60) + 25 = 85 minutes. Then enter 85 in the time field.

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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