To convert mph, or miles per hour, to kph, or kilometers per hour, you need to know that there are 1.60934400061 kph per 1 mph. Use a calculator, a piece of paper and a pencil to perform the conversion.
- Gather your supplies
Use a calculator as well as a piece of paper and a pencil to calculate how many kilometers per hour are in a single mile per hour.
- Write the equation
Write 70 x 1.60934400061 on your paper.
- Use your calculator
Multiply 70 by 1.60934400061 by hitting the appropriate buttons on your calculator.
- Write the answer
Discover that 70 x 1.60934400061 = 112.65408004302844. Write the answer: 70 mph equals 112.65408004302844 kph.