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

Divide by 1.09728. This comes from 1 foot = 0.3048 metres, so 1 ft/s = 0.3048 m/s = 1.09728 km/h, and therefore km/h ÷ 1.09728 = ft/s.

How fast is 100 km/h in ft/s?

100 km/h ÷ 1.09728 ≈ 91.1344 ft/s.

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

Multiply the ft/s value by 1.09728. 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 international foot is defined as exactly 0.3048 metres, which produces the non-round factor 1.09728.

Is fps the same as ft/s?

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

Kilometers per Hour to Feet per Second Converter

Name: Kilometers per Hour to Feet per Second Converter
Availability: InStock
Author: Nham Vu

Enter a speed in km/h and instantly get the equivalent in feet per second.

Speed Converter

Kilometers per Hour (km/h)

Feet per Second (ft/s)

Reverse: ft/s → km/h

Feet per Second (ft/s)

Kilometers per Hour (km/h)

Common Reference Speeds

Description	km/h	ft/s

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

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Summary

Enter a speed in km/h and instantly get the equivalent in feet per second.

How it works

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

Use cases

Translate metric vehicle speeds into feet per second for physics calculations.
Convert international weather or wind data to ft/s for US engineering reports.
Cross-check athletic or ballistic speeds between metric and imperial systems.
Compare sensor readings from metric dashboards with ft/s-based instruments.
Support homework problems that require both unit systems.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu