What is foot?
A foot is a unit of length in imperial and US customary systems equal to 12 inches. It is commonly used in construction, architecture, body height measurements, and aviation for altitude references.
Real-world uses
Feet are the primary unit for building dimensions, room sizes, and ceiling heights in the United States. Aviation uses feet for altitude worldwide (e.g., cruising at 35,000 ft). Human height in the US and UK is commonly expressed in feet and inches.
History
The foot has been used since ancient civilizations, with varying lengths based on the local king's foot. The modern international foot was defined in 1959 as exactly 0.3048 metres, replacing slightly different US and British survey definitions.
Common mistakes
Using an apostrophe for feet (6') and confusing it with the prime symbol. Also, people often round 1 foot to 30 cm instead of the correct 30.48 cm, leading to cumulative errors in construction.
What is mile?
A mile is a unit of length commonly used in the United States and the United Kingdom for road distance and travel-related measurements.
Real-world uses
Miles are used for road distances and speed limits in the United States, the United Kingdom, and a few other countries. Runners track marathon distances in miles (26.2 mi), and car odometers in these countries display miles.
History
The word "mile" comes from the Latin "mille passus" meaning a thousand paces (double steps), roughly 4,860 Roman feet. The statute mile of 5,280 feet was established by English Parliament in 1593 under Queen Elizabeth I.
Common mistakes
Confusing statute miles (5,280 feet) with nautical miles (1,852 metres). Also, assuming that mileage figures (like fuel economy in mpg) translate directly when comparing US gallons versus Imperial gallons.
When is this conversion used?
This conversion is frequently needed in construction, architecture, and real estate where building codes may specify dimensions in one system while materials are sold in another. Road distances and speed limits are posted in kilometres in most countries and miles in the US and UK, making this conversion essential for international drivers and route planning.
Worked examples
1 foot = 0.00018939 mile
1 mile = 1,609.344 metre
How to convert foot to mile
To convert foot to mile, multiply the value by 0.00018939.
To convert mile back to foot, multiply by 5,280.
Measurement standards
The metre is one of seven SI base units, maintained by the International Bureau of Weights and Measures (BIPM). Since 2019, it is defined by fixing the numerical value of the speed of light in vacuum to exactly 299,792,458 metres per second.
Did you know?
A human hair is roughly 70 micrometres wide, while a single gold atom measures about 0.144 nanometres in diameter — meaning you could line up nearly half a million atoms across the width of one hair.
Quick reference: foot to mile
| foot | mile |
|---|---|
| 0.1 | 0.00001894 |
| 0.5 | 0.0000947 |
| 1 | 0.00018939 |
| 2 | 0.00037879 |
| 5 | 0.00094697 |
| 10 | 0.00189394 |
| 25 | 0.00473485 |
| 50 | 0.0094697 |
| 100 | 0.01893939 |
| 250 | 0.04734848 |
| 500 | 0.09469697 |
| 1,000 | 0.18939394 |
Common values
| foot | mile | |
|---|---|---|
| Height of a door | 6.88976378 foot | 0.00130488 mile |
| Basketball court length | 91.86351706 foot | 0.01739839 mile |
| Football field (soccer) | 344.48818898 foot | 0.06524398 mile |
| Marathon distance | 138,435.03937008 foot | 26.21875746 mile |
| Altitude of a cruising airplane | 35,000 foot | 6.62878788 mile |