How many feet are in a kilometre?

One km displays as 3,280.83989501 international ft, using exactly 1,250,000/381 feet per kilometre. That reciprocal has a repeating decimal. Further supplied values display as 1,640.41994751 ft for 0.5 km, 6,561.67979003 ft for 2 km and 328,083.989501 ft for 100 km. Some inputs produce exact short outputs: 1.609344 km is exactly 5,280 ft. Displayed and copied results round beyond twelve significant digits.

What is the formula for km to feet?

Feet = kilometres × 1,000 / 0.3048, with exactly 1,000 m per km and 0.3048 m per international foot. In reverse, km = ft × 0.3048 / 1,000, so 1 ft is exactly 0.0003048 km. A rounded multiplier such as 3,280.84 only approximates the exact factor: its excess per km is about 0.000105 ft or 0.00126 in, growing to about 0.126 in for 100 km. Use the exact factor to avoid carrying shortcut error into later calculations.

Is kilometres to feet an exact conversion?

The factor is exact and the decimal is not. The 1959 agreement defines the yard as exactly 0.9144 metres, which makes the foot exactly 0.3048 metres and the inch exactly 2.54 cm, so none of this is a measurement that could be refined later. Dividing by 0.3048 is dividing by 381/1,250, and 381 factors into 3 × 127, so the quotient repeats rather than stops. This page shows twelve significant digits of it, and Copy result copies the headline exactly as printed, without the thousands separators.

How many feet is 5 km, 10 km or a marathon?

5 km is 16,404.1994751 ft and 10 km is 32,808.3989501 ft. A supplied length of 21.0975 km is 69,217.519685 ft, and a supplied length of 42.195 km is 138,435.03937 ft. Type the distance in the From box and the headline updates as you type; there is no convert button to press, and the list underneath works out every common length unit at the same time. These conversions do not measure a course or certify an official race distance.

How do I read the answer as feet and inches?

The interactive headline is scalar decimal feet. For an exact mixed split of 1 km, start from the original 1,000 m: 3,280 international feet occupy exactly 999.744 m, leaving 0.256 m. That remainder displays as 10.0787401575 in, or about 10.08 in to two decimal places. The total-inch row displays as 39,370.0787402 in. Multiplying the rounded fractional part of 3,280.83989501 ft only approximates the original remainder; the scalar input does not accept compound feet-and-inch measurements.

What about the US survey foot?

The historical US survey foot is exactly 1,200/3,937 m, a separate convention absent from this menu. A supplied 1 km length divided by that definition gives 3,280.83333333 survey ft at twelve significant digits, compared with 3,280.83989501 international ft. The survey foot is about two parts per million longer. A record’s stated convention must determine which definition applies; its date or place alone does not establish it. This converter uses the international foot of exactly 0.3048 m.

Can I convert feet back to kilometres here?

Yes. The Swap units button between the two boxes reverses the pair without a reload, which turns this into a feet to kilometres page: 1,000 ft is 0.3048 km, 5,280 ft is exactly 1.609344 km, which is one mile, and 3,281 ft is 1.0000488 km. The list under the answer follows the swap, so a distance in feet comes out in metres, kilometres, miles, yards and the rest at once.

Why does this page open on kilometres and feet?

This focused page opens on Kilometer and Foot, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Show 7 more adds nanometres, micrometres, thou, furlongs, astronomical units, light years and parsecs to the readout. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.

KM to Feet Converter

A foot has been exactly 0.3048 metres since the international yard and pound agreement of 1959, and a kilometre is exactly 1,000 metres, so kilometres to feet is one division: feet = km × 1,000 / 0.3048. The factor works out to 1,250,000/381, or approximately 3,280.839895013... feet in a kilometre, and that decimal never ends, because 381 is 3 × 127 and a fraction only terminates when its denominator is built from 2s and 5s. So the relation is defined rather than measured, while displayed answers round to twelve significant digits when needed: 1 km reads 3,280.83989501 ft here, 5 km reads 16,404.1994751 ft and 10 km reads 32,808.3989501 ft. An exact whole-foot example is the international mile, 1.609344 km and exactly 5,280 ft. Displayed answers carry twelve significant digits, with very large or very small results shown in exponential notation. This page opens the converter with kilometres in the From box and feet in the To box, whatever pair you converted last, and lists the same distance in metres, centimetres, millimetres, inches, yards, miles and nautical miles under the answer.

From

To3,280.83989501

Category: Length

Base unit: meter

Uncommon units: Show 7 more

Feet, yards and miles use international definitions. A light year uses a 365.25-day Julian year; the parsec coefficient is approximate.

Results round to 12 significant digits using the listed unit definitions. Input must have a finite numeric magnitude and at most 512 significant digits. Type a single decimal or scientific number; a matching From unit suffix is accepted. Commas and grouped spaces separate thousands; decimal commas, fractions and compound measurements are refused.

1 km in every length unit

Millimetermm
1,000,000
Centimetercm
100,000
Meterm
1,000
Inchin
39,370.0787402
Footft
3,280.83989501
Yardyd
1,093.61329834
Milemi
0.621371192237
Nautical milenmi
0.539956803456

Selectable complete conversion

Unit Converter — Length
Input: 1 (Kilometer, km)
Result: 3280.83989501 ft (Foot)
Displayed values round to 12 significant digits.
Feet, yards and miles use international definitions. A light year uses a 365.25-day Julian year; the parsec coefficient is approximate.
All other units:
Nanometer (nm): 1000000000000
Micrometer (µm): 1000000000
Millimeter (mm): 1000000
Centimeter (cm): 100000
Meter (m): 1000
Inch (in): 39370.0787402
Foot (ft): 3280.83989501
Yard (yd): 1093.61329834
Mile (mi): 0.621371192237
Nautical mile (nmi): 0.539956803456
Thou (mil): 39370078.7402
Furlong (fur): 4.9709695379
Astronomical unit (AU): 6.68458712227e-9
Light year (ly): 1.05700083402e-13
Parsec (pc): 3.24077928944e-14

Common questions

How many feet are in a kilometre?: One km displays as 3,280.83989501 international ft, using exactly 1,250,000/381 feet per kilometre. That reciprocal has a repeating decimal. Further supplied values display as 1,640.41994751 ft for 0.5 km, 6,561.67979003 ft for 2 km and 328,083.989501 ft for 100 km. Some inputs produce exact short outputs: 1.609344 km is exactly 5,280 ft. Displayed and copied results round beyond twelve significant digits.
What is the formula for km to feet?: Feet = kilometres × 1,000 / 0.3048, with exactly 1,000 m per km and 0.3048 m per international foot. In reverse, km = ft × 0.3048 / 1,000, so 1 ft is exactly 0.0003048 km. A rounded multiplier such as 3,280.84 only approximates the exact factor: its excess per km is about 0.000105 ft or 0.00126 in, growing to about 0.126 in for 100 km. Use the exact factor to avoid carrying shortcut error into later calculations.
Is kilometres to feet an exact conversion?: The factor is exact and the decimal is not. The 1959 agreement defines the yard as exactly 0.9144 metres, which makes the foot exactly 0.3048 metres and the inch exactly 2.54 cm, so none of this is a measurement that could be refined later. Dividing by 0.3048 is dividing by 381/1,250, and 381 factors into 3 × 127, so the quotient repeats rather than stops. This page shows twelve significant digits of it, and Copy result copies the headline exactly as printed, without the thousands separators.
How many feet is 5 km, 10 km or a marathon?: 5 km is 16,404.1994751 ft and 10 km is 32,808.3989501 ft. A supplied length of 21.0975 km is 69,217.519685 ft, and a supplied length of 42.195 km is 138,435.03937 ft. Type the distance in the From box and the headline updates as you type; there is no convert button to press, and the list underneath works out every common length unit at the same time. These conversions do not measure a course or certify an official race distance.
How do I read the answer as feet and inches?: The interactive headline is scalar decimal feet. For an exact mixed split of 1 km, start from the original 1,000 m: 3,280 international feet occupy exactly 999.744 m, leaving 0.256 m. That remainder displays as 10.0787401575 in, or about 10.08 in to two decimal places. The total-inch row displays as 39,370.0787402 in. Multiplying the rounded fractional part of 3,280.83989501 ft only approximates the original remainder; the scalar input does not accept compound feet-and-inch measurements.
What about the US survey foot?: The historical US survey foot is exactly 1,200/3,937 m, a separate convention absent from this menu. A supplied 1 km length divided by that definition gives 3,280.83333333 survey ft at twelve significant digits, compared with 3,280.83989501 international ft. The survey foot is about two parts per million longer. A record’s stated convention must determine which definition applies; its date or place alone does not establish it. This converter uses the international foot of exactly 0.3048 m.
Can I convert feet back to kilometres here?: Yes. The Swap units button between the two boxes reverses the pair without a reload, which turns this into a feet to kilometres page: 1,000 ft is 0.3048 km, 5,280 ft is exactly 1.609344 km, which is one mile, and 3,281 ft is 1.0000488 km. The list under the answer follows the swap, so a distance in feet comes out in metres, kilometres, miles, yards and the rest at once.
Why does this page open on kilometres and feet?: This focused page opens on Kilometer and Foot, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Show 7 more adds nanometres, micrometres, thou, furlongs, astronomical units, light years and parsecs to the readout. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.

Results round to 12 significant digits using the listed unit conventions. Many factors are exact definitions; psi and parsec use rounded coefficients. Temperature includes scale offsets. Days and weeks are fixed-duration units, and unit conversion does not determine calendar dates, ambient pressure or a software label’s convention.