Miles to Feet Converter

Miles to Feet

Convert miles (mi) to feet (ft). Both measure distance and dimension, and the conversion comes up in construction, navigation, sports work.

The Formula

`` feet = miles × 5280 miles = feet × 0.000189393939394 `

One mile is 5,280 feet, and one foot is 1.8939e-4 miles.

Conversion Table

Miles	Feet
1 mi	5,280 ft
2 mi	10,560 ft
5 mi	26,400 ft
10 mi	52,800 ft
25 mi	132,000 ft
50 mi	264,000 ft
100 mi	528,000 ft
500 mi	2,640,000 ft
1,000 mi	5,280,000 ft

The Other Direction

Feet	Miles
1 ft	1.8939e-4 mi
2 ft	3.7879e-4 mi
5 ft	9.4697e-4 mi
10 ft	0.001894 mi
25 ft	0.004735 mi
50 ft	0.00947 mi
100 ft	0.018939 mi
500 ft	0.094697 mi
1,000 ft	0.189394 mi

What Each Unit Is

Miles (mi) — exactly 1,609.344 metres, by the 1959 international yard and pound agreement. The Roman mille passus — a thousand paces — later fixed by English statute at 5,280 feet.

Feet (ft) — exactly 0.3048 metres, or one third of a yard. A human foot, standardised across centuries of conflicting local definitions.

A Sense of Scale

• A brisk walk covers a mile in 15 minutes
• A marathon is 26.2 miles
• US speed limits are in mph
• A ceiling is 8–9 ft
• Aviation altitude is always in feet
• A door is about 6.7 ft

Precision

The factor 5280 is exact by international agreement, not a rounded approximation. Any imprecision in a result comes from your input, not the conversion.

In Code

`javascript const mileToFoot = (value) => value * 5280; ``

Where This Conversion Comes Up

• Construction
• Navigation
• Sports
• Sewing
• Mapping

How Many Decimals Do You Need?

Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 mi with the factor truncated at each decimal place:

Decimals kept	Factor	137 mi becomes	Error
0	5280	723,360	—
1	5280	723,360	—
2	5280	723,360	—
3	5280	723,360	—
4	5280	723,360	—

A rule that holds for any conversion: round once, at the end. Rounding the factor and then multiplying compounds the error through every subsequent calculation, while carrying full precision and rounding the final answer does not.

The right number of significant figures is set by your input, not by the converter. If you measured miles to three significant figures, the answer in feet is only good to three — writing more digits claims precision the measurement never had.