km/h to m/s
Convert km/h to m/s. Enter a value and view the calculation method, examples and conversion table.
Speed converter
km/h to m/s formula
The calculator converts the input to the category's reference unit, then divides by the target unit's factor.
Result = input × source factor ÷ target factor
1 × (0.277777777778 ÷ 1) ≈ 0.277778
Worked example: 1 Kilometres per hour ≈ 0.277778 Metres per second
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
km/h to m/s conversion table
| Kilometres per hour | Metres per second |
|---|---|
| 1 Kilometres per hour | ≈ 0.277778 Metres per second |
| 2 Kilometres per hour | ≈ 0.555556 Metres per second |
| 5 Kilometres per hour | ≈ 1.388889 Metres per second |
| 10 Kilometres per hour | ≈ 2.777778 Metres per second |
| 20 Kilometres per hour | ≈ 5.555556 Metres per second |
| 50 Kilometres per hour | ≈ 13.888889 Metres per second |
| 100 Kilometres per hour | ≈ 27.777778 Metres per second |
| 250 Kilometres per hour | ≈ 69.444444 Metres per second |
| 500 Kilometres per hour | ≈ 138.888889 Metres per second |
| 1,000 Kilometres per hour | ≈ 277.777778 Metres per second |
Definitions and assumptions
Speed factors are expressed relative to metres per second. The knot is one nautical mile per hour. The speed-of-sound example uses 343 m/s for dry air near 20°C; actual sound speed varies with conditions.
How to use this calculator
- Enter the value you want to convert.
- Choose the source and target units, then adjust the display precision if needed.
- Read the result. Select Convert to open a page for this value, or use the table below.
Frequently asked questions
how many m/s is 1 km/h?
1 Kilometres per hour ≈ 0.277778 Metres per second. Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
how to convert km/h to m/s?
The calculator converts the input to the category's reference unit, then divides by the target unit's factor. 1 × 0.277777777778 ≈ 0.277778 Metres per second. Use the source and target factors shown in the formula. The worked example uses the value on this page, and the table provides other common values.
Is the speed of sound a fixed conversion factor?
No. The example factor is 343 m/s for dry air near 20°C. Temperature and the medium affect the actual speed of sound.
Why is the displayed result rounded?
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
What input range can I use?
This calculator accepts non-negative values up to 1 trillion, with up to 8 decimal places. It does not calculate signed vectors or calendar date intervals.
Why is a unit unavailable?
A conversion is unavailable when a verified unit definition or a current exchange-rate value has not been configured. The tool does not invent a coefficient.
Sources and methodology
Methods and sources · Content revised
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