Spike's Calculators

# Average Speed of Kilometres per Hour

Calculate your average speed in kilometres per hour based on the distance traveled in a specific period.

### Speed from Time and Distance

Distance Traveled in Kilometres km
Travel Time hr min sec
Decimal Rounding #

#### Results:

 Distance Converted to Miles mi Speed in Kilometres/Hour km/hr Speed in Miles/Hour mi/hr

#### Calculation

1. enter the distance traveled in kilometres
2. the time in hours, minutes and seconds
3. number of digits after the decimal point for the results

#### Result

1. the distance traveled converted to miles
2. your average speed in kilometres per hour
3. the average speed in miles per hour

### Formula

`Speed = distance/time`

### Example Calculation

```distance travelled = 154 kilometres
the time it took to travel this distance = 7 hours and 12 minutes
```
```Changing the 12 minutes into decimal hour format;
There are 60 minutes in one hour; to change one minute into hours, divide one by 60.
```
`1 ÷ 60 = 0.01666666666666666666666666666667.`
`Multiply the 12 minutes by 0.01666666666666666666666666666667 to covert to a decimal hour.`
`12 * 0.01666666666666666666666666666667 = 0.2`
`7 hours and 12 minutes = 7.2 hours`
`Divide the distance by 7.2 hours to get the kilometre-per-hour speed;`
`154 ÷ 7.2 = 21.3888 rounded to 21.4`
`Your average speed of travel in this example is 21.4 kilometres an hour.`

### Conversions

```one hour = 60 minutes
one minute = 0.01666666666666666666666666666667 hours
one kilometre (km) = 0.621371192237334 miles (mi)
```