# Convert 20 kilometers per hour to miles per hour

How many miles per hour are 20 kilometers per hour?

kilometers per hour (km/h)
20 kilometers per hour = 12.427 miles per hour

## Precise decimal and fraction answers

The conversion in miles per hour rounded to six significant decimal places is 20 km/h = 12.427424 mph. The precise fraction answer is 12 745/1743 mph.

### Decimal Precision

Conversion from one to ten decimal places

• 20 km/h = 12.4 mph
• 20 km/h = 12.43 mph
• 20 km/h = 12.427 mph
• 20 km/h = 12.4274 mph
• 20 km/h = 12.42742 mph
• 20 km/h = 12.427424 mph
• 20 km/h = 12.4274238 mph
• 20 km/h = 12.42742384 mph
• 20 km/h = 12.427423845 mph
• 20 km/h = 12.4274238447 mph

## How many miles per hour is a kilometer per hour?

A kilometer per hour is slower than a mile per hour. 0.621 miles per hour is the same velocity as one kilometer per hour. A kilometer per hour is 62.14% the velocity a mile per hour. An object moving at a mile per hour is 60.93% faster than an object traveling at one kilometer per hour.

## Kilometers per hour to miles per hour conversion factor and formulas

Formula

The conversion factor between kilometers per hour and miles per hour is 1.609. This represents the ratio of kilometers per hour per one mile per hour. To calculate the value in miles per hour, we can either divide by the conversion factor or multiply by its inverse.

### Division

To convert from kilometers per hour to miles per hour, divide kilometers per hour by 1.609.
The formula is expressed as:
km/h ÷ 1.609 = mph

### Multiplication

Alternatively we can multiply by the inverse conversion factor to get the same result.
The inverse of 1.609 is 1/1.609 or 0.621. To convert from kilometers per hour to miles per hour, multiply kilometers per hour by 0.621.
The formula is expressed as:
km/h × 0.621 = mph

To convert 20 kilometers per hour to miles per hour, divide 20 kilometers per hour by 1.609.
20 km/h ÷ 1.609 = 12.427 mph

## How fast are 20 kilometers per hour?

Real world scale examples to visualize the velocity of 20 kilometers per hour / 12.427 miles per hour

• 1.04 times the comfortable bicycling speed (12 mph)
• 34% of the typical speed of a racehorse (37 mph)
• 18% of the typical automobile speed on a highway (70 mph)

Converting kilometers per hour to miles per hour is a conversion between units from separate unit systems - kilometers per hour are metric (SI) defined units while miles per hour are US Customary / UK Imperial .

SI Unit

Within the SI (metric) system of measurement, a kilometer per hour (km/h) is the distance traveled in one hour as measured in kilometers (1,000 meters). It is commonly used as measurement of velocity over geographic distances. Kilometers per hour are commonly used to measure vehicle speed and speed limits. The official SI symbol is km/h, however kph and km/hr are also used.

Customary/Imperial Unit

Miles per hour is a velocity measurement within the US/UK Imperial systems. It is defined as the number of miles traveled in one hour. MPH is frequently used for measurement and regulation of vehicle speed limits in the US, UK and many British dependencies. The common symbols for miles per hour are mph, MPH or mi/hr.

## Reverse this conversion

Convert from miles per hour to kilometers per hour instead.

## 20 kilometers per hour to other speed units

### Metric

• 20 km/h = 20 km/h

### Imperial/U.S.

• 20 km/h = 12.427 mph
• 20 km/h = 10.799 kn

## References and Citations

1. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)
2. National Institute of Standards and Technology (NIST) General Tables of Units of Measurement

## Decimal conversions for 20 km/h to mph

km/h mph
20.01 km/h 12.434 mph
20.02 km/h 12.44 mph
20.03 km/h 12.446 mph
20.04 km/h 12.452 mph
20.05 km/h 12.458 mph
20.06 km/h 12.465 mph
20.07 km/h 12.471 mph
20.08 km/h 12.477 mph
20.09 km/h 12.483 mph
20.1 km/h 12.49 mph
20.11 km/h 12.496 mph
20.12 km/h 12.502 mph
20.13 km/h 12.508 mph
20.14 km/h 12.514 mph
20.15 km/h 12.521 mph
20.16 km/h 12.527 mph
20.17 km/h 12.533 mph
20.18 km/h 12.539 mph
20.19 km/h 12.545 mph
20.2 km/h 12.552 mph
20.21 km/h 12.558 mph
20.22 km/h 12.564 mph
20.23 km/h 12.57 mph
20.24 km/h 12.577 mph
20.25 km/h 12.583 mph
20.26 km/h 12.589 mph
20.27 km/h 12.595 mph
20.28 km/h 12.601 mph
20.29 km/h 12.608 mph
20.3 km/h 12.614 mph
20.31 km/h 12.62 mph
20.32 km/h 12.626 mph
20.33 km/h 12.632 mph
20.34 km/h 12.639 mph
20.35 km/h 12.645 mph
20.36 km/h 12.651 mph
20.37 km/h 12.657 mph
20.38 km/h 12.664 mph
20.39 km/h 12.67 mph
20.4 km/h 12.676 mph
20.41 km/h 12.682 mph
20.42 km/h 12.688 mph
20.43 km/h 12.695 mph
20.44 km/h 12.701 mph
20.45 km/h 12.707 mph
20.46 km/h 12.713 mph
20.47 km/h 12.719 mph
20.48 km/h 12.726 mph
20.49 km/h 12.732 mph
20.5 km/h 12.738 mph
km/h mph
20.51 km/h 12.744 mph
20.52 km/h 12.751 mph
20.53 km/h 12.757 mph
20.54 km/h 12.763 mph
20.55 km/h 12.769 mph
20.56 km/h 12.775 mph
20.57 km/h 12.782 mph
20.58 km/h 12.788 mph
20.59 km/h 12.794 mph
20.6 km/h 12.8 mph
20.61 km/h 12.806 mph
20.62 km/h 12.813 mph
20.63 km/h 12.819 mph
20.64 km/h 12.825 mph
20.65 km/h 12.831 mph
20.66 km/h 12.838 mph
20.67 km/h 12.844 mph
20.68 km/h 12.85 mph
20.69 km/h 12.856 mph
20.7 km/h 12.862 mph
20.71 km/h 12.869 mph
20.72 km/h 12.875 mph
20.73 km/h 12.881 mph
20.74 km/h 12.887 mph
20.75 km/h 12.893 mph
20.76 km/h 12.9 mph
20.77 km/h 12.906 mph
20.78 km/h 12.912 mph
20.79 km/h 12.918 mph
20.8 km/h 12.925 mph
20.81 km/h 12.931 mph
20.82 km/h 12.937 mph
20.83 km/h 12.943 mph
20.84 km/h 12.949 mph
20.85 km/h 12.956 mph
20.86 km/h 12.962 mph
20.87 km/h 12.968 mph
20.88 km/h 12.974 mph
20.89 km/h 12.98 mph
20.9 km/h 12.987 mph
20.91 km/h 12.993 mph
20.92 km/h 12.999 mph
20.93 km/h 13.005 mph
20.94 km/h 13.012 mph
20.95 km/h 13.018 mph
20.96 km/h 13.024 mph
20.97 km/h 13.03 mph
20.98 km/h 13.036 mph
20.99 km/h 13.043 mph