# Convert 30 kilometers per hour to miles per hour

How many miles per hour are 30 kilometers per hour?

kilometers per hour (km/h)
30 kilometers per hour = 18.641 miles per hour

## Precise decimal and fraction answers

The conversion in miles per hour rounded to six significant decimal places is 30 km/h = 18.641136 mph. The precise fraction answer is 18 745/1162 mph.

### Decimal Precision

Conversion from one to ten decimal places

• 30 km/h = 18.6 mph
• 30 km/h = 18.64 mph
• 30 km/h = 18.641 mph
• 30 km/h = 18.6411 mph
• 30 km/h = 18.64114 mph
• 30 km/h = 18.641136 mph
• 30 km/h = 18.6411358 mph
• 30 km/h = 18.64113577 mph
• 30 km/h = 18.641135767 mph
• 30 km/h = 18.6411357671 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 30 kilometers per hour to miles per hour, divide 30 kilometers per hour by 1.609.
30 km/h ÷ 1.609 = 18.641 mph

## How fast are 30 kilometers per hour?

Real world scale examples to visualize the velocity of 30 kilometers per hour / 18.641 miles per hour

• 1.55 times the comfortable bicycling speed (12 mph)
• 50% of the typical speed of a racehorse (37 mph)
• 27% 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.

## 30 kilometers per hour to other speed units

### Metric

• 30 km/h = 30 km/h

### Imperial/U.S.

• 30 km/h = 18.641 mph
• 30 km/h = 16.199 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 30 km/h to mph

km/h mph
30.01 km/h 18.647 mph
30.02 km/h 18.654 mph
30.03 km/h 18.66 mph
30.04 km/h 18.666 mph
30.05 km/h 18.672 mph
30.06 km/h 18.678 mph
30.07 km/h 18.685 mph
30.08 km/h 18.691 mph
30.09 km/h 18.697 mph
30.1 km/h 18.703 mph
30.11 km/h 18.709 mph
30.12 km/h 18.716 mph
30.13 km/h 18.722 mph
30.14 km/h 18.728 mph
30.15 km/h 18.734 mph
30.16 km/h 18.741 mph
30.17 km/h 18.747 mph
30.18 km/h 18.753 mph
30.19 km/h 18.759 mph
30.2 km/h 18.765 mph
30.21 km/h 18.772 mph
30.22 km/h 18.778 mph
30.23 km/h 18.784 mph
30.24 km/h 18.79 mph
30.25 km/h 18.796 mph
30.26 km/h 18.803 mph
30.27 km/h 18.809 mph
30.28 km/h 18.815 mph
30.29 km/h 18.821 mph
30.3 km/h 18.828 mph
30.31 km/h 18.834 mph
30.32 km/h 18.84 mph
30.33 km/h 18.846 mph
30.34 km/h 18.852 mph
30.35 km/h 18.859 mph
30.36 km/h 18.865 mph
30.37 km/h 18.871 mph
30.38 km/h 18.877 mph
30.39 km/h 18.883 mph
30.4 km/h 18.89 mph
30.41 km/h 18.896 mph
30.42 km/h 18.902 mph
30.43 km/h 18.908 mph
30.44 km/h 18.915 mph
30.45 km/h 18.921 mph
30.46 km/h 18.927 mph
30.47 km/h 18.933 mph
30.48 km/h 18.939 mph
30.49 km/h 18.946 mph
30.5 km/h 18.952 mph
km/h mph
30.51 km/h 18.958 mph
30.52 km/h 18.964 mph
30.53 km/h 18.97 mph
30.54 km/h 18.977 mph
30.55 km/h 18.983 mph
30.56 km/h 18.989 mph
30.57 km/h 18.995 mph
30.58 km/h 19.002 mph
30.59 km/h 19.008 mph
30.6 km/h 19.014 mph
30.61 km/h 19.02 mph
30.62 km/h 19.026 mph
30.63 km/h 19.033 mph
30.64 km/h 19.039 mph
30.65 km/h 19.045 mph
30.66 km/h 19.051 mph
30.67 km/h 19.057 mph
30.68 km/h 19.064 mph
30.69 km/h 19.07 mph
30.7 km/h 19.076 mph
30.71 km/h 19.082 mph
30.72 km/h 19.089 mph
30.73 km/h 19.095 mph
30.74 km/h 19.101 mph
30.75 km/h 19.107 mph
30.76 km/h 19.113 mph
30.77 km/h 19.12 mph
30.78 km/h 19.126 mph
30.79 km/h 19.132 mph
30.8 km/h 19.138 mph
30.81 km/h 19.144 mph
30.82 km/h 19.151 mph
30.83 km/h 19.157 mph
30.84 km/h 19.163 mph
30.85 km/h 19.169 mph
30.86 km/h 19.176 mph
30.87 km/h 19.182 mph
30.88 km/h 19.188 mph
30.89 km/h 19.194 mph
30.9 km/h 19.2 mph
30.91 km/h 19.207 mph
30.92 km/h 19.213 mph
30.93 km/h 19.219 mph
30.94 km/h 19.225 mph
30.95 km/h 19.231 mph
30.96 km/h 19.238 mph
30.97 km/h 19.244 mph
30.98 km/h 19.25 mph
30.99 km/h 19.256 mph