kilometer per hour second to millimeter per second squared
Convert kilometer per hour second (km/(h·s)) to millimeter per second squared (mm/s²). Use an editable acceleration converter, conversion formula, and reference table.
1 km/(h·s) = 277.7777778 mm/s²
Conversion formula
One kilometer per hour second equals 277.7777778 millimeter per second squared. Multiply your value in kilometer per hour second by this factor to get millimeter per second squared. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 kilometer per hour second:5 × 277.7777778 = 1,388.888889 mm/s²
Conversion table
| kilometer per hour second (km/(h·s)) | millimeter per second squared (mm/s²) |
|---|---|
| 0.01 | 2.777777778 |
| 0.1 | 27.77777778 |
| 1 | 277.7777778 |
| 2 | 555.5555556 |
| 5 | 1,388.888889 |
| 10 | 2,777.777778 |
| 25 | 6,944.444444 |
| 50 | 13,888.88889 |
| 100 | 27,777.77778 |
| 1000 | 277,777.7778 |
About these measurements
Acceleration is the rate of velocity change.
The base reference used here is the meter per second squared. One kilometer per hour second is 0.2777777778 base units; one millimeter per second squared is 0.001 base units.
Important distinctions
Compound units must match the quantity and dimension. Temperature intervals use size factors rather than temperature offsets. Calorie and BTU entries use the explicit definitions shown.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert km/(h·s) to mm/s²?
Multiply the quantity in km/(h·s) by 277.7777778. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the millimeter per second squared to kilometer per hour second converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
