What is the exact conversion factor from ft/s to km/h?

Multiply by 1.09728. This comes from 1 foot = 0.3048 metres, so 1 ft/s = 0.3048 m/s × 3600 s/hr ÷ 1000 m/km = 1.09728 km/h.

How do I convert km/h back to ft/s?

Divide the km/h value by 1.09728, or equivalently multiply by 0.911344. Use the reverse field in this tool for instant results.

Why is this conversion not a round number?

Feet and kilometres derive from different base units. The metre is defined exactly, and the international foot is defined as exactly 0.3048 metres, which produces the non-round factor 1.09728.

Is ft/s the same as fps?

Yes. "fps" and "ft/s" are both common abbreviations for feet per second, the same unit.

Feet per Second to Kilometers per Hour Converter

Enter a speed in feet per second and instantly get the equivalent in kilometers per hour.

Speed Converter

Feet per Second (ft/s)

Kilometers per Hour (km/h)

Reverse: km/h → ft/s

Kilometers per Hour (km/h)

Feet per Second (ft/s)

Common Reference Speeds

Description	ft/s	km/h

Conversion formula: km/h = ft/s × 1.09728
Reverse: ft/s = km/h ÷ 1.09728

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Summary

This converter multiplies your feet-per-second value by exactly 1.09728 to produce kilometers per hour. The factor comes directly from the SI definition: 1 foot = 0.3048 m, so 1 ft/s = 0.3048 m/s = 1.09728 km/h. Results are rounded to four decimal places for everyday use and six for engineering.

How it works

Enter a speed value in the ft/s field.
The tool multiplies the input by 1.09728 (the exact conversion factor).
The km/h result appears instantly below the input.
Use the reverse field to convert km/h back to ft/s.
Check the reference table for common speed benchmarks.

Use cases

Convert wind speed readings from US weather data to metric.
Translate athletic or projectile speeds into km/h for international reports.
Cross-check physics homework using both unit systems.
Compare vehicle speeds between imperial and metric dashboards.
Convert ballistic or fluid-flow measurements for engineering calculations.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu