Kilometre to Foot Converter
Convert km to feet instantly. Free km to feet calculator with formula, examples and FAQs.
Quick answer
1 km equals 3280.84 feet. To convert km to feet, multiply the km value by 3280.84 — so 10 km = 32808.4 feet. This factor is exact, and the reverse conversion (feet to km) simply divides by 3280.84 instead of multiplying.
Converted value
3,280.84
1.00 km = 3,280.84 feet
What is km to feet?
km to feet is a length conversion: the measured amount does not change, just the way it is expressed. It matters most to travellers, runners and anyone using metric maps. A single conversion factor (feet = km × 3280.84) handles any value, large or small.
Real-world uses: why convert km to feet?
Converting km to feet bridges two ways of measuring the same thing. People do it most often when logging running and cycling distances from a GPS watch, and on the receiving side when reading aviation altitude given in feet. Having the exact value — not a rough estimate — prevents costly mistakes in paperwork, purchases and planning.
- •Planning road trips and reading distance on highway signs.
- •Logging running and cycling distances from a GPS watch.
- •Checking map and navigation distances abroad.
- •Converting marathon and race distances for training.
- •Reading aviation altitude given in feet.
Who uses this conversion?
How the km to feet conversion is calculated
This is the same arithmetic that calculators and search engines use — no rounded shortcuts.
feet = km × 3280.84
- Both km and feet are defined in terms of the same base unit, the metre.
- 1 km = 1000 metre, and 1 feet = 0.3048 metre.
- Divide one definition by the other to get the conversion factor: 1000 ÷ 0.3048 = 3280.84.
- So feet = km × 3280.84. Multiply any km value by 3280.84 to get the result in feet.
Precision: The conversion factor is exact by international definition, so the result is an exact rational number. We display it rounded to four decimal places (or four significant figures for very small values).
Example calculations
- •5 km = 16404.1995 feet
- •10 km = 32808.399 feet
- •42 km = 137795.2756 feet
km to feet quick reference table
Common km values converted to feet, each calculated with the exact factor.
| km | feet |
|---|---|
| 10 | 32808.399 |
| 25 | 82020.9974 |
| 50 | 164041.9948 |
| 100 | 328083.9895 |
| 250 | 820209.9738 |
| 500 | 1640419.9475 |
| 1000 | 3280839.895 |
| 2500 | 8202099.7375 |
| 5000 | 16404199.4751 |
| 10000 | 32808398.9501 |
Common mistakes to avoid
- •Reading the result the wrong way round. Confirm the answer is in feet, not km, before you rely on it.
- •Truncating instead of rounding, which compounds error across larger km values.
- •Mixing metric and imperial units midway through a multi-step conversion instead of converting to a single base unit first.
Common questions about length conversions
Is this length conversion exact?
Yes. Factors such as 1 inch = 25.4 mm and 1 mile = 1,609.344 m are exact by international agreement, so the only rounding is in how many decimals we display.
Why do my results differ slightly from another tool?
Almost always because the other tool rounds the factor (e.g. 0.62 instead of 0.621371) or rounds partway through. We keep full precision and round only the final value.
Metric or imperial — which should I use?
Use metric (m, cm, km) for science and most countries, and imperial (ft, in, miles) for US and UK everyday distances. This page bridges the two exactly.
Can I round the answer?
Yes. For everyday use one or two decimals is plenty; engineering and science may need more. Round only at the end to avoid cumulative error.
History of these units
History of the kilometre
metric
The kilometre arrived with the metric system in 1790s France as 1,000 metres, the metre itself first defined as one ten-millionth of the distance from the equator to the North Pole. It is now the standard unit for road distance across most of the world.
History of the foot
imperial / US customary
The foot has roots in the length of a human foot and varied widely before standardisation. The international foot is now exactly 0.3048 metres and stays common in US construction and aviation altitude.
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Frequently asked questions
How do I convert km to feet?
What is 1 km in feet?
How many miles is a 5K or 10K run?
How do I convert feet back to km?
When would I need to convert km to feet?
Is the km to feet factor exact?
Is my data private when I use this km to feet converter?
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