Record Specific Window: How to Capture One App

This calculator works out how long a screen recording of a specific window will take based on the recording duration you set, and it also converts that duration into minutes and seconds. You enter the finish time and distance, and it returns your average pace and speed. The calculator below is a general tool for converting a duration into a pace and speed, which is useful for planning recordings of a specific window.

Formula

The calculator uses two basic formulas. The average pace (in minutes per kilometer) is the total time in minutes divided by the distance in kilometers:

pace = t / d

The average speed (in kilometers per hour) is the distance divided by the time in hours, where time in hours is t / 60:

speed = d / (t / 60)

Where:

• t = total time in minutes
• d = distance in kilometers
• pace = minutes per kilometer (min/km)
• speed = kilometers per hour (km/h)

Worked Example

Using the default values from the calculator (t = 50 minutes, d = 10 km):

1. Calculate pace: 50 / 10 = 5.00 min/km
2. Calculate speed: 10 / (50 / 60) = 10 / 0.8333 = 12.00 km/h

The calculator shows an average pace of 5.00 min/km and an average speed of 12.00 km/h for these inputs.

When to Use This Calculator

This calculator is useful for runners, cyclists, or walkers who want to convert a total workout time and distance into a per-kilometer pace and an average speed. For example, if you run 10 km in 50 minutes, you can quickly see that your pace is 5 minutes per kilometer, which helps you set goals for future workouts. It also works for any activity where you measure time and distance, such as hiking or rowing.

How to Read the Results

The pace result tells you how many minutes it takes to cover one kilometer. A lower pace number means faster. The speed result tells you how many kilometers you cover in one hour. These two numbers are inversely related: a faster pace (lower min/km) results in a higher speed (km/h). For example, 5 min/km equals 12 km/h, while 6 min/km equals 10 km/h.

Common Mistakes and Unit Mix-Ups

The most common error is mixing units. If you enter time in hours instead of minutes, the pace will be wrong. Always convert hours to minutes (multiply by 60) before entering. Similarly, if your distance is in miles, convert to kilometers (multiply by 1.60934) or use a separate calculator for miles. Another mistake is rounding too early; keep at least two decimal places during intermediate steps to get an accurate final result.

Limitations of the Formula

This formula assumes a constant pace and speed over the entire distance. In real workouts, your pace varies due to terrain, wind, or fatigue. The result is an average, not a real-time measurement. Also, the formula does not account for stops or breaks; if you pause your watch, the total time should only include moving time for an accurate average pace.

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, 5 min/km gives 60 / 5 = 12 km/h. This calculator does that conversion for you when you enter time and distance.

What if I run on a treadmill and the distance is in miles?

Convert miles to kilometers first by multiplying by 1.60934. For instance, 3 miles is 4.83 km. Then enter that distance and your time in minutes to get pace in min/km and speed in km/h.

Can I use this for walking as well?

Yes, the formula works for any activity where you know total time and distance. Walking pace is typically slower (higher min/km), but the calculation is identical.

Why does the calculator show two decimals?

Two decimals give a reasonable balance between precision and readability. For pace, 5.00 min/km is clear; for speed, 12.00 km/h is enough for most purposes. You can round further if you need a whole number.

What is a good running pace for a beginner?

There is no single answer, but a common beginner pace is around 6 to 7 min/km (about 8.5 to 10 km/h). This varies widely by age, fitness, and experience. Use this calculator to find your current pace and track improvements over time.

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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