Km to Feet Converter: Instant & Accurate

This calculator converts a distance in kilometers to feet instantly. Enter the number of kilometers, and you get the equivalent length in feet, along with the result in meters for reference. The conversion uses the exact international standard: 1 kilometer equals 3,280.839895 feet.

Formula

The conversion is a simple multiplication:

Feet = Kilometers × 3,280.839895

Where:

• Kilometers (km) is the distance you start with.
• Feet (ft) is the result in the imperial/US customary unit.
• 3,280.839895 is the exact number of feet in one kilometer, based on the international foot defined as exactly 0.3048 meters.

This factor comes from the definitions: 1 km = 1,000 meters, and 1 meter = 3.28083989501312 feet (since 1 foot = 0.3048 m). Multiplying the two gives the constant above.

Worked Example

Using the default value of 5 kilometers:

1. Start with the distance: 5 km.
2. Multiply by the conversion factor: 5 × 3,280.839895 = 16,404.199475.
3. Round to two decimal places: 16,404.20 feet.

So 5 kilometers equals 16,404.20 feet. For a quick mental check, remember that 1 km is roughly 3,281 feet, so 5 km is about 16,405 feet — the calculator gives the precise value.

Why Convert Kilometers to Feet?

Kilometers are the standard unit for long distances in most of the world, while feet are used in the United States, Canada (partially), and the UK for certain measurements like altitude, building dimensions, and aviation. You might need this conversion when:

• Reading a hiking trail map in kilometers but your GPS device displays elevation or distance in feet.
• Comparing running or cycling distances from international sources.
• Working on engineering or construction projects that mix metric and imperial blueprints.
• Understanding aviation altitudes, which are almost always given in feet, even in metric countries.

Having both units side by side helps avoid costly mistakes in planning or measurement.

How the Conversion Works

The international foot was defined in 1959 as exactly 0.3048 meters. This makes the conversion factor a fixed number, not an approximation. Because both the meter and the foot are now defined by the speed of light and the second (via the meter), the relationship is exact.

To convert in the other direction (feet to kilometers), divide by the same factor: 1 foot = 0.0003048 kilometers. This is useful when you have a measurement in feet and need kilometers.

For rough mental math, you can use 3,281 feet per kilometer, which introduces an error of less than 0.005% — negligible for most everyday purposes. For precise work, use the full factor.

Common Mistakes and How to Avoid Them

• Using the wrong direction: Multiplying feet by 3,281 instead of dividing gives a wildly large number. Always check whether you are converting km→ft (multiply) or ft→km (divide).
• Rounding too early: If you round the factor to 3,280 before multiplying, you lose precision. Keep at least 4 decimal places until the final step.
• Mixing up meters and feet: A kilometer is 1,000 meters, but a meter is only about 3.28 feet. So a kilometer is 1,000 × 3.28 = 3,280 feet. Many people mistakenly think a kilometer is about 3,280 meters.
• Forgetting decimal places: 0.5 km is not 1,640 feet, it is 1,640.42 feet. Small inputs still need the full factor.

Limits of the Conversion

This conversion is exact for any distance, so there are no practical limits. The only consideration is precision: the calculator rounds to two decimal places, which is far more precise than any real-world measurement you would take with a tape measure. For scientific work, you might need more decimal places, but the factor itself is exact.

One thing to note: the foot used in aviation and surveying (the international foot) is the same as the one used here. However, the US survey foot (used before 2023) was slightly different (1 ft = 1200/3937 m). For most purposes, the difference is less than 2 parts per million, but for large distances it can add up. This calculator uses the modern international foot, which is now the standard in the US as well.

Frequently Asked Questions

How many feet are in a kilometer exactly?

Exactly 3,280.83989501312 feet. This is derived from 1 km = 1,000 m and 1 m = 1/0.3048 ft. Most calculators round to 3,280.84 feet.

Is 1 kilometer longer than 1 mile?

No. A mile is longer: 1 mile = 1.60934 kilometers. So 1 kilometer is about 0.621371 miles. In feet, 1 mile is 5,280 feet, while 1 kilometer is 3,280.84 feet.

Why do we still use feet if the world uses kilometers?

Feet are deeply embedded in US infrastructure, aviation, and construction. Changing would cost billions and cause confusion. The US officially adopted the metric system in 1975, but conversion is voluntary, so feet remain common.

How do I convert feet back to kilometers?

Divide the number of feet by 3,280.839895. For example, 10,000 feet ÷ 3,280.839895 = 3.048 kilometers. Or multiply feet by 0.0003048.

What is the difference between a kilometer and a klick?

None. “Klick” is military slang for a kilometer. It originated in the US Army during the Vietnam War, possibly from the sound of a distance-measuring odometer. The conversion is the same.

Can I use this for heights like mountain elevations?

Yes. If a mountain is 8,848 meters high (Mount Everest), that is 8.848 km. Multiply by 3,280.839895 to get 29,029 feet — the commonly cited elevation. This works for any vertical or horizontal distance.

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in km | Kilometers | km | 5 | 0
out ft | Feet | ft | km * 3280.839895 | 2
out m | Meters | m | km * 1000 | 2