20 km equals approximately 12.4274 mph
Converting 20 kilometers to miles results in about 12.4274 miles. This conversion is useful when comparing distances or speeds between metric and imperial systems, especially for travelers or sports enthusiasts who prefer miles per hour over kilometers per hour.
Conversion Explanation
The process involves knowing that 1 kilometer is equal to approximately 0.621371 miles. To convert kilometers to miles, you multiply the kilometer value by this factor. For example, 20 km * 0.621371 = 12.4274 mph. This allows for quick translation between the two measurement systems for speed or distance.
Conversion Tool
Result in mph:
Conversion Formula
The formula for km to mph is simple: multiply the number of kilometers by 0.621371. This factor comes from the known equivalence that 1 km equals 0.621371 miles. So, for any km value, you perform km * 0.621371 to get the mph speed. For example, 15 km * 0.621371 = 9.320565 mph.
Conversion Example
- Convert 10 km to mph:
- Step 1: Write down the km value: 10 km
- Step 2: Multiply 10 by 0.621371: 10 * 0.621371
- Step 3: Calculate: 6.21371 mph
- Result: 10 km equals approximately 6.2137 mph
- Convert 35 km to mph:
- Step 1: Write down 35 km
- Step 2: Multiply 35 by 0.621371: 35 * 0.621371
- Step 3: Calculate: 21.748985 mph
- Result: 35 km equals approximately 21.749 mph
- Convert 50 km to mph:
- Step 1: Write down 50 km
- Step 2: Multiply 50 by 0.621371: 50 * 0.621371
- Step 3: Calculate: 31.06855 mph
- Result: 50 km equals approximately 31.0686 mph
Conversion Chart
| Km | Mph |
|---|---|
| -5.0 | -3.1069 |
| -4.0 | -2.4895 |
| -3.0 | -1.8721 |
| -2.0 | -1.2547 |
| -1.0 | -0.6373 |
| 0.0 | 0.0 |
| 5.0 | 3.1069 |
| 10.0 | 6.2137 |
| 15.0 | 9.3206 |
| 20.0 | 12.4274 |
| 25.0 | 15.5343 |
| 30.0 | 18.6411 |
| 35.0 | 21.748 |
| 40.0 | 24.8548 |
| 45.0 | 27.9617 |
This chart shows km values on the left and their corresponding mph equivalents on the right. Use it to quickly see approximate speeds or distances in miles based on kilometers.
Related Conversion Questions
- How fast is 20 km per hour in miles per hour?
- What is the mph equivalent of 20 km/h?
- Convert 20 kilometers per hour to miles per hour
- Is 20 km/h faster than 12 mph?
- How long does it take to travel 20 km at 12 mph?
- What’s the difference between 20 km/h and 20 mph?
- Can I convert 20 km to miles in a simple way?
Conversion Definitions
km
Km (kilometer) is a metric unit of length equal to 1,000 meters, used worldwide to measure distances between locations or points along a route, and is part of the metric system adopted in most countries for standard measurement.
mph
Mph (miles per hour) is a speed unit indicating how many miles are traveled in one hour, commonly used in the United States and the UK for speed limits, vehicle speeds, and certain athletic contexts.
Conversion FAQs
How accurate is the km to mph conversion factor?
The conversion factor 0.621371 is derived from the exact relationship between miles and kilometers. While it provides a high degree of accuracy for everyday use, minor differences may occur in very precise scientific calculations due to rounding.
Can I convert any km value to mph using this formula?
Yes, the same formula applies regardless of the km value. Just multiply the number of kilometers by 0.621371 to get the equivalent miles per hour. This works for both small and large distances or speeds.
Why do some countries use km and others use mph?
Different countries adopted measurement systems based on historical, cultural, and legislative choices. Most of the world uses the metric system (km), while the US and UK use mph for speed because of tradition and existing standards.