Kilometers to Feet Converter
Convert kilometers to feet — one kilometer is 3,280.84 feet, the conversion behind altitude and trail signage. Results update as you type; exact factors shown.
One kilometer is 3,280.8399 feet — see the exact factor, not a rounded rule of thumb.
How the kilometers to feet converter works
Every length is converted through the meter, the SI base unit of length. The inch has been defined as exactly 25.4 mm since the 1959 international yard and pound agreement, so a foot is exactly 0.3048 m, a yard 0.9144 m and a statute mile 1,609.344 m. The nautical mile is 1,852 m by international definition.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common length conversions
| From | To | Units |
|---|---|---|
| 0.1 km | 328.084 ft | kilometers to feet |
| 0.5 km | 1,640.4199 ft | kilometers to feet |
| 1 km | 3,280.8399 ft | kilometer to feet |
| 1.6 km | 5,249.3438 ft | kilometers to feet |
| 2 km | 6,561.6798 ft | kilometers to feet |
| 3 km | 9,842.5197 ft | kilometers to feet |
| 5 km | 16,404.1995 ft | kilometers to feet |
| 8 km | 26,246.7192 ft | kilometers to feet |
| 10 km | 32,808.399 ft | kilometers to feet |
| 20 km | 65,616.7979 ft | kilometers to feet |
| 42.195 km | 138,435.0394 ft | kilometers to feet |
| 100 km | 328,083.9895 ft | kilometers to feet |
Units in this converter and their exact factors
| Unit | Symbol | One unit in meters |
|---|---|---|
| millimeter | mm | 0.001 meter |
| centimeter | cm | 0.01 meter |
| meter | m | 1 meter |
| kilometer | km | 1,000 meter |
| inch | in | 0.0254 meter |
| foot | ft | 0.3048 meter |
| yard | yd | 0.9144 meter |
| mile | mi | 1,609.344 meter |
| nautical mile | nmi | 1,852 meter |
FAQFrequently asked questions about length conversion
How many feet in a kilometer?
3,280.84 feet.
What is 5 km in feet?
16,404.2 feet.
Why do aviation and hiking still use feet?
Altitude is reported in feet almost everywhere outside China and Russia, so cruising levels and summit heights stay imperial even in metric countries.
How many feet is a marathon?
About 138,435 feet — 42.195 km.
Is a kilometer more or less than 3,000 feet?
More — 3,280.84 feet, so estimating 1 km as 3,300 feet is within half a percent.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.