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

Divide by 3.6. This comes from 1 km = 1000 m and 1 hour = 3600 s: 1 km/h × 1000 ÷ 3600 = 1/3.6 m/s ≈ 0.27778 m/s.

How fast is 1 km/h in m/s?

1 km/h equals exactly 1/3.6 m/s, which is approximately 0.2778 m/s.

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

Multiply the m/s value by 3.6. For example, 10 m/s × 3.6 = 36 km/h. Use the reverse field in this tool for instant results.

Why is the factor exactly 3.6?

Both units are metric so the factor is a clean number: 3600 seconds per hour divided by 1000 metres per kilometre equals 3.6.

Is kph the same as km/h?

Yes. "kph" and "km/h" are both abbreviations for kilometers per hour and refer to the same unit of speed.

Kilometers per Hour to Meters per Second Converter

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

Speed Converter

Kilometers per Hour (km/h)

Meters per Second (m/s)

Reverse: m/s → km/h

Meters per Second (m/s)

Kilometers per Hour (km/h)

Common Reference Speeds

Description	km/h	m/s

Conversion formula: m/s = km/h ÷ 3.6
Reverse: km/h = m/s × 3.6

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Summary

This converter divides your kilometers-per-hour value by exactly 3.6 to produce meters per second. The factor comes directly from unit definitions: 1 km = 1000 m and 1 hour = 3600 seconds, so 1 km/h ÷ 3600 s/h × 1000 m/km = 1/3.6 m/s. Results are shown to four decimal places for everyday use.

How it works

Enter a speed value in the km/h field.
The tool divides the input by 3.6 (the exact conversion factor).
The m/s result appears instantly below the input.
Use the reverse field to convert m/s back to km/h.
Check the reference table for common speed benchmarks.

Use cases

Convert vehicle speed from km/h (speedometer) to m/s for physics calculations.
Translate wind speed readings from km/h weather reports into SI units for engineering.
Convert athlete sprint or race times recorded in km/h to m/s for biomechanics analysis.
Cross-check scientific formulas that require speed in SI units (m/s).
Verify GPS speed data against speedometer readings that use different units.

Frequently Asked Questions

Last updated: 2026-06-15 · Reviewed by Nham Vu