Pixel Magic Eraser: How to Use It

Pixel Magic Eraser is a photo-editing tool on Google Pixel phones that removes unwanted objects or people from a picture. You open the photo in Google Photos, tap Edit, choose Magic Eraser, and then brush over the object you want gone. The tool analyzes the surrounding pixels and fills the selected area with a plausible background, so the result looks like the object was never there.

Formula

The calculator works out your average pace and speed from a finish time and a distance. Pace is the time per unit distance, and speed is the distance per unit time. The formulas are:

Pace = Finish time (min) ÷ Distance (km)
Speed = Distance (km) ÷ (Finish time (min) ÷ 60)

• t = finish time in minutes (e.g., 50 min)
• d = distance in kilometers (e.g., 10 km)
• 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. Pace = 50 ÷ 10 = 5.00 min/km
2. Speed = 10 ÷ (50 ÷ 60) = 10 ÷ 0.8333 = 12.00 km/h

The calculator returns a pace of 5.00 min/km and a speed of 12.00 km/h.

When to Use This Calculator

Use this tool when you have a finish time and a distance and want to know your average pace or speed. It is handy for runners, cyclists, and walkers who want to compare workouts or plan a target pace. For example, if you ran 5 km in 30 minutes, enter those values to see your pace (6.00 min/km) and speed (10.00 km/h).

How to Read the Result

The pace tells you how many minutes it takes to cover one kilometer. A lower pace means faster. Speed tells you how many kilometers you cover in one hour. A higher speed means faster. Both are useful: pace is common in running, speed is common in cycling and driving.

Common Mistakes

• Mixing units: If your distance is in miles, convert to kilometers first (1 mile = 1.60934 km) or use a different calculator.
• Using seconds: Enter the finish time in minutes, not seconds. Convert 45:30 to 45.5 minutes.
• Rounding too early: Keep more decimals during the calculation to avoid a wrong final answer.

Limits of the Formula

This formula assumes a constant pace throughout the entire distance. In reality, your pace varies with terrain, weather, and effort. The calculator gives an average, not a detailed split. It also does not account for breaks or stops. For interval training or hilly routes, the average may not reflect the true effort.

Frequently Asked Questions

Can I use this for miles?

Yes, but you need to convert miles to kilometers first. Multiply the distance in miles by 1.60934 to get kilometers. For example, 3.1 miles is about 5 km. Enter the converted value.

What if I only know my speed, not my pace?

You can still use the calculator: enter a finish time and distance, and it gives both pace and speed. Or, if you know speed and distance, you can calculate time by rearranging the formula: Time (min) = Distance (km) ÷ Speed (km/h) × 60.

Why is pace shown as min/km and not min/mile?

This calculator uses kilometers as the default unit. If you prefer min/mile, convert your distance to miles and use a separate calculator, or convert the result: 1 min/km = 1.60934 min/mile.

Does this work for walking?

Yes, the formula is the same for any activity that involves moving a distance over time. Walking pace is usually slower, so the pace value will be higher.

What is a good pace?

It depends on your fitness level and activity. A recreational runner might have a pace of 6-8 min/km, while a competitive runner might be 4-5 min/km. For walking, a pace of 12-15 min/km is common. Use the calculator to find your own average.

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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