Kilometers to Feet Converter
Enter a distance in kilometers to get the exact equivalent in feet, with a feet-and-inches breakdown and step-by-step working. Flip the direction to convert feet back to kilometers. Common real-world distances such as marathon length, altitude records, and mountain heights are shown for context.
Formula
Worked example
Convert 5 km to feet: 5 km × 3,280.839895 = 16,404.199 ft, or 16,404 ft 2 in. Convert back: 16,404.199 ft ÷ 3,280.839895 = 5.000 km exactly.
How to convert kilometers to feet
One kilometer equals exactly 3,280.839895 feet. To convert any distance in kilometers to feet, multiply by that factor: feet = km x 3,280.839895. The relationship is exact because the foot is defined as 0.3048 meters, and the kilometer is 1,000 meters, so 1 km = 1,000 / 0.3048 = 3,280.839895... feet. For the reverse, divide feet by 3,280.839895, or equivalently multiply by 0.0003048, to get kilometers.
Why both units are still widely used
The kilometer is the standard unit for road distances in most of the world, used on road signs across Europe, Asia, Africa, and Latin America. The foot, by contrast, remains the dominant unit for altitude in aviation (all aircraft report altitude in feet globally), for shorter architectural and construction measurements in the United States, and for depth measurements in US and UK nautical contexts. Because pilots, engineers, and athletes frequently need to work across both systems, a quick km-to-feet converter is a practical everyday tool. The foot itself was standardized internationally in 1959 when the US and Commonwealth nations agreed that one foot equals 0.3048 meters exactly, ending centuries of slight national variations.
Real-world distances in kilometers and feet
Knowing a few landmark distances in both units helps build intuition. Mount Everest, the world's highest peak, is 8.849 km or 29,032 feet above sea level. A standard marathon is 42.195 km (138,435 ft). A standard international mile is 1.60934 km (5,280 ft exactly). The cruising altitude of a commercial aircraft is typically 10-13 km (33,000-42,650 ft). The Challenger Deep, the ocean's deepest known point, reaches approximately 10.935 km (35,876 ft) below sea level. In athletics, a 10 km race equals 32,808 feet.
Avoiding rounding errors in the conversion
A common shortcut is to approximate 1 km as 3,281 feet, which introduces an error of about 0.16 ft per kilometer. Over short distances this is negligible, but it compounds: at 100 km the error reaches about 16 ft, and at 1,000 km it exceeds 160 ft. For engineering, aviation, or any precision application, always use the full factor of 3,280.839895 (or equivalently, divide meters by 0.3048). This calculator uses the exact factor throughout.
Kilometers to Feet Conversion Table
| Kilometers (km) | Feet (ft) | Feet and Inches | Miles |
|---|---|---|---|
| 0.1 | 328.084 | 328' 1" | 0.0621 |
| 0.25 | 820.210 | 820' 3" | 0.1553 |
| 0.5 | 1,640.420 | 1,640' 5" | 0.3107 |
| 1 | 3,280.840 | 3,280' 10" | 0.6214 |
| 2 | 6,561.680 | 6,561' 8" | 1.2427 |
| 5 | 16,404.199 | 16,404' 2" | 3.1069 |
| 10 | 32,808.399 | 32,808' 5" | 6.2137 |
| 21.0975 | 69,226.722 | Marathon (42,195 km half) | 13.1094 |
| 42.195 | 138,435.039 | Marathon | 26.2188 |
| 100 | 328,083.990 | 328,083' 12" | 62.137 |
| 1000 | 3,280,839.895 | 3,280,840' approx. | 621.371 |
Common distances converted from kilometers to feet. 1 km = 3,280.839895 ft.
Frequently asked questions
How many feet are in a kilometer?
One kilometer equals exactly 3,280.839895 feet. This follows from the international definition: 1 foot = 0.3048 meters, so 1 km = 1,000 / 0.3048 = 3,280.839895 ft. In everyday use the value is often rounded to 3,281 feet.
How do I convert km to feet without a calculator?
Multiply the number of kilometers by 3,281 for a quick approximation. For example, 5 km x 3,281 = 16,405 ft (the precise answer is 16,404.20 ft, so the rounding error is less than 1 ft). For a more accurate mental shortcut, multiply by 3,000 and add 9% of the result: 5 x 3,000 = 15,000; 9% of 15,000 = 1,350; total = 16,350 ft (still about 54 ft short at 5 km).
How do I convert feet to kilometers?
Divide feet by 3,280.839895, or equivalently multiply by 0.0003048. For example, 10,000 ft / 3,280.839895 = 3.0480 km. Use the direction toggle in the calculator above to switch to feet-to-kilometers mode.
Why do aircraft use feet instead of meters or kilometers?
Aviation altitudes are reported in feet worldwide - even in countries that otherwise use the metric system - due to the historical dominance of American aviation standards after World War II. The International Civil Aviation Organization (ICAO) standardized feet for altitude to ensure all pilots worldwide speak the same altitude language, reducing the risk of miscommunication. Horizontal distances in aviation use nautical miles, not kilometers.
What is the difference between feet and square feet?
Feet (ft) measure length or distance in one dimension. Square feet (ft2) measure area in two dimensions. This calculator converts linear distances only: km to feet or feet to km. If you need area conversions (km2 to square feet), use a dedicated area converter.
How many feet is 1.5 km?
1.5 km x 3,280.839895 = 4,921.260 feet, or approximately 4,921 ft 3 in. This is a common running distance slightly shorter than a mile (5,280 ft).