How do you convert feet per second to kilometers per hour?

To convert feet per second (ft/s) to kilometers per hour (km/h), multiply the speed in feet per second by 1.09728 (kilometers per hour = feet per second × 1.09728).

What is 5 feet per second in kilometers per hour?

5 feet per second (5 ft/s) is equal to 5.4864 kilometers per hour (5.4864 km/h).

Which is larger, 1 feet per second (ft/s) or 1 kilometers per hour (km/h)?

One feet per second (ft/s) is larger than one kilometers per hour (km/h). Specifically, 1 ft/s contains 1.09728 km/h, whereas 1 km/h is 0.91134 ft/s.

How do I convert back from kilometers per hour (km/h) to feet per second (ft/s)?

To reverse the calculation from km/h to ft/s, multiply your kilometers per hour value by the inverse factor 0.91134 (or divide by 1.09728). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round ft/s to km/h results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 ft/s ≈ 5.49 km/h). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Feet per Second to Kilometers per Hour Converter

Enter the speed in feet per second below to convert it to kilometers per hour.

Kilometers per Hour to Feet per Second (km/h → ft/s)

Convert Feet per Second to Kilometers per Hour

Enter a value in feet per second (ft/s) to convert to kilometers per hour (km/h).

Value (ft/s)

From

Result

•

5.4864kilometers per hour

5 ft/s = 5.4864 km/h

Result updates automatically

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Equivalent Measurements Across UnitsFor 5 ft/s

Knots2.96242 kn

Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Velocity))

[1–3] ↓

Feet per Second to Kilometers per Hour Conversion Table

Table showing various feet per second measurements converted to kilometers per hour. Click any preset value or arrow to load it into the converter.

Feet per Second (ft/s)	Kilometers per Hour (km/h)
1 ft/s	1.09728 km/h
2 ft/s	2.19456 km/h
2.5 ft/s	2.7432 km/h
5 ft/s	5.4864 km/h
10 ft/s	10.9728 km/h
15 ft/s	16.4592 km/h
20 ft/s	21.9456 km/h
25 ft/s	27.432 km/h
30 ft/s	32.9184 km/h
50 ft/s	54.864 km/h

How to Convert Feet per Second to Kilometers per Hour

To convert feet per second to kilometers per hour, multiply the speed by the following conversion ratio: 1.09728 kilometers per hour/feet per second.

Since one feet per second is equal to 1.09728 kilometers per hour, you can use this simple formula to convert:

kilometers per hour = feet per second × 1.09728

The speed in kilometers per hour is equal to the speed in feet per second multiplied by 1.09728.

For example, here's how to convert 5 feet per second to kilometers per hour using the formula above.

kilometers per hour = (5 ft/s × 1.09728) = 5.4864 km/h

How Many Kilometers per Hour Are in a Feet per Second?

There are 1.09728 kilometers per hour in a feet per second, which is why we use this value in the formula above.

1 ft/s = 1.09728 km/h|1 km/h = 0.9113444 ft/s

Our feet per second to kilometers per hour calculator automatically converts your speed measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Feet per Second and kilometers per hour are both units used to measure speed. Keep reading to learn more about each unit.

What Is a Feet per Second?

A feet per second is a unit of speed equal to 0.3048 meters per second (m/s), the base unit for speed. Equal to 0.3048 m/s. [1]

The feet per second is classified as a US customary and imperial unit of speed. Feet per Second can be abbreviated as ft/s; for example, 1 feet per second can be written as 1 ft/s.

When working with feet per second (ft/s) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, feet per second (ft/s) are widely used across standard speed applications within US customary and imperial workflows, engineering documentation, and technical data sheets.

Learn more about feet per second in our Speed Converter.

What Is a Kilometers per Hour?

A kilometers per hour is a unit of speed equal to 0.2777778 meters per second (m/s), the base unit for speed. Standard metric road speed unit (1 m/s = 3.6 km/h). [2]

The kilometers per hour is classified as a metric and SI-compatible unit of speed. Kilometers per Hour can be abbreviated as km/h; for example, 1 kilometers per hour can be written as 1 km/h.

In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilometers per hour (km/h) a convenient decimal multiple of the meters per second (m/s).

In practice, kilometers per hour (km/h) are widely used across standard speed applications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about kilometers per hour in our Speed Converter.

When converting speed between feet per second (ft/s) and kilometers per hour (km/h), keep full floating-point precision (1 ft/s = 1.09728 km/h; 1 km/h = 0.9113444 ft/s) during intermediate calculations and round only the final kilometers per hour figure to match your instrument tolerance.

More Feet per Second & Kilometers per Hour Conversions

Need to calculate in the opposite direction? Use our kilometers per hour to feet per second calculator to switch your starting unit immediately. You can also explore related tools such as converting kilometers per hour to feet per second, converting miles per hour to kilometers per hour, or converting meters per second to kilometers per hour.

Convert from Feet per Second

Convert to Kilometers per Hour

Frequently Asked Questions

There are 1.09728 kilometers per hour (km/h) in 1 feet per second (ft/s). Conversely, 1 kilometers per hour (km/h) is equal to 0.91134 feet per second (ft/s).

Speed Converter

Quick Info

Direct Factor: 1 feet per second (ft/s) equals 1.09728 kilometers per hour (km/h).
Inverse Factor: 1 kilometers per hour (km/h) equals 0.91134 feet per second (ft/s).
Formula: kilometers per hour = feet per second × 1.09728.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Feet per Second (ft/s)

Equal to 0.3048 m/s.

Kilometers per Hour (km/h)

Standard metric road speed unit (1 m/s = 3.6 km/h).

Meters per Second (m/s)

Coherent SI unit of velocity.

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Velocity)
Source
[2]NIST OWM · SI Units — Length & Distance
Source
[3]NIST CUU · SI Coherent Derived Units (m/s)
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Velocity))·Speed Metrology Standard — Feet per Second (ft/s) to Kilometers per Hour (km/h)
NIST SP 811 Standard
[2]
NIST OWM (SI Units — Length & Distance)·Unit Specifications: Feet per Second (ft/s) & Kilometers per Hour (km/h)
NIST OWM Specification
[3]
NIST CUU (SI Coherent Derived Units (m/s))·Conversion Factors & Mathematical Basis (ft/s to km/h)
NIST CUU Reference

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