To convert 400 kilometers per hour to the equivalent value in miles per hour, multiply 400 kilometers by the equivalent value in miles. One kilometer equals 0.62 mile, so 400 kph equals 248 mph.
- Find the conversion factor
One kilometer equals 0.62 mile. Because the starting value and the result are in units per hour, use the same conversion factor for distance over time.
- Multiply the amount of kilometers per hour by the conversion factor
For this problem, use the following equation: 400 kph * 0.62 = 248.
- Label the result
The calculated answer is in miles per hour, so 400 kph equals 248 mph.