Earbud Case Screens: What They Actually Do

Earbud case screens are small displays built into the charging case that show status information you would normally get from your phone. They let you check battery levels, control playback, and adjust settings without opening your phone’s Bluetooth menu. Here is a feature-by-feature breakdown of what these screens can actually do, how they work, and what to look for when buying a pair.

Formula

The calculator above works out your average pace and speed for a run or ride. The formulas are:

• Pace = finish time ÷ distance (in minutes per kilometer)
• Speed = distance ÷ (finish time ÷ 60) (in kilometers per hour)

Where:

• t = finish time in minutes
• d = distance in kilometers

Pace tells you how long it takes to cover one kilometer; speed tells you how many kilometers you cover in one hour. They are reciprocals of each other, so knowing one lets you estimate the other.

Worked Example

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

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

So your average pace is 5:00 per kilometer and your average speed is 12 km/h. The calculator shows the same results rounded to two decimals.

When to Use This

Use this calculator when you finish a run, ride, or walk and want to know your average pace or speed without doing mental math. It is especially handy for training plans that specify target paces, like “run at 5:30 per kilometer� or “hold 10 km/h on the bike.� You can also use it to plan: if you want to run 10 km in 45 minutes, what pace do you need? Enter 45 and 10 to find out.

How to Read the Result

A lower pace number means faster (fewer minutes per kilometer). A higher speed number means faster. For example, a pace of 4:30 min/km is faster than 5:00 min/km, and a speed of 13.3 km/h is faster than 12 km/h. The two numbers are just different ways of expressing the same performance.

For most runners, pace is the more intuitive measure because it matches how they think about splits. Cyclists often prefer speed. Both are valid; choose the one that matches your sport or training plan.

Common Mistakes

• Mixing units: If you run in miles, convert distance to kilometers first (1 mile = 1.60934 km) or use a miles-based calculator. The formulas here assume kilometers.
• Using decimal hours instead of minutes: Enter 50 for 50 minutes, not 0.83 (which is 50 minutes as a fraction of an hour). The calculator expects minutes.
• Rounding too early: If you round pace to 5.0 and then convert to speed, you get 12.0, which is fine. But if you round to 5.00 and then use the unrounded time, you get a more accurate result. Let the calculator do the rounding at the end.

Limits of the Formula

This formula assumes a constant speed over the entire distance. In reality, your pace varies with hills, wind, traffic, and fatigue. The result is an average, not a description of your splits. It also does not account for pauses (like stopping at a red light), so if you stop, the time you enter should be your moving time, not total elapsed time, to get a true average pace.

For very short distances (like a 100-meter sprint) or very long ones (ultramarathons), the average still works, but it becomes less useful because the variability is high. The formula is most meaningful for steady efforts like a 5K, 10K, half marathon, or a long bike ride.

Frequently Asked Questions

What is a good running pace for a beginner?

There is no single “good� pace because it depends on age, fitness, and experience. A common starting point is 6:00–7:00 min/km for a comfortable jog. Use the calculator to see what that translates to in speed (about 8.6–10 km/h). Focus on effort, not the number, and gradually increase.

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

Multiply the min/km pace by 1.60934. For example, 5:00 min/km is about 8:03 per mile. To convert speed from km/h to mph, multiply by 0.621371.

Does the calculator work for walking?

Yes. Walking pace is typically 10–15 min/km. Enter your walking time and distance, and you will get your average pace and speed. The formula is the same for any human-powered movement.

Why does my GPS watch show a different pace?

GPS watches calculate pace in real time using your current speed, and they may include pauses or smooth out data. Your overall average from the calculator is based on the total time and distance you enter, which may differ if the watch’s distance is slightly off due to GPS error or if it includes auto-pause.

Can I use this for cycling?

Absolutely. Enter the distance in kilometers and the time in minutes. For cycling, speeds are usually higher, so the pace number will be small (like 2 min/km), and speed is the more common metric. The formulas are identical.

What if I want to know my pace for a half marathon?

Enter the distance (21.0975 km) and your target finish time. For example, if you want to finish in 2 hours (120 minutes), the calculator will show a pace of 5:41 min/km and a speed of 10.55 km/h. That gives you a concrete target to train for.

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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