Kilometers to Feet Converter

Kilometers to Feet

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

The Formula

`` feet = kilometers × 3280.83989501 kilometers = feet × 0.0003048 `

One kilometer is 3,280.84 feet, and one foot is 3.0480e-4 kilometers.

Conversion Table

Kilometers	Feet
1 km	3,280.84 ft
2 km	6,561.68 ft
5 km	16,404.2 ft
10 km	32,808.4 ft
25 km	82,021 ft
50 km	164,041.99 ft
100 km	328,083.99 ft
500 km	1,640,419.95 ft
1,000 km	3,280,839.9 ft

The Other Direction

Feet	Kilometers
1 ft	3.0480e-4 km
2 ft	6.0960e-4 km
5 ft	0.001524 km
10 ft	0.003048 km
25 ft	0.00762 km
50 ft	0.01524 km
100 ft	0.03048 km
500 ft	0.1524 km
1,000 ft	0.3048 km

What Each Unit Is

Kilometers (km) — 1,000 metres. The metric system’s road-scale unit, adopted across most of the world in the 19th century.

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 20-minute walk covers about 1.5 km
• A marathon is 42.195 km
• A cruising airliner flies at 11 km
• A ceiling is 8–9 ft
• Aviation altitude is always in feet
• A door is about 6.7 ft

Precision

The factor 3280.83989501 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.

In Code

`javascript const kilometerToFoot = (value) => value * 3280.83989501; ``

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 km with the factor truncated at each decimal place:

Decimals kept	Factor	137 km becomes	Error
0	3281	449,497	0.0049%
1	3280.8	449,469.6	0.0012%
2	3280.84	449,475.08	—
3	3280.84	449,475.08	—
4	3280.8399	449,475.07	—

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 kilometers to three significant figures, the answer in feet is only good to three — writing more digits claims precision the measurement never had.

Other Conversions From Kilometers

The same value in every other unit this converter supports for length:

From	To	Unit
1 km	1,000 m	Meters
1 km	100,000 cm	Centimeters
1 km	1,000,000 mm	Millimeters
1 km	0.621371 mi	Miles
1 km	1,093.61 yd	Yards
1 km	39,370.08 in	Inches
1 km	0.539957 nmi	Nautical Miles

Chaining conversions works — kilometers to metres to feet gives the same answer as kilometers to feet — but each step rounds, so a chain of three conversions carries three roundings. Convert directly where a direct factor exists.