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Kilometers per Hour to Kilometers per Second Converter

Convert kilometers per hour (km/h) to kilometers per second (km/s), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter a speed, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
0.000277777777778 km/s
knots
0.539956803456 kn
Mach (at 343 m/s)
0.000809847748623 Mach
speed of light
9.26566931106 × 10⁻¹⁰ c
miles per hour
0.621371192237 mph
feet per second
0.911344415281 ft/s
meters per second
0.277777777778 m/s
centimeters per second
27.7777777778 cm/s

1 km/h = 0.000277777777778 km/s

Show the working
  1. 1 km/h = 0.000277777777778 km/s
  2. 1 × 0.000277777777778 = 0.000277777777778 km/s

How to convert kilometers per hour to kilometers per second

1 km/s = 3,600 km/h, so divide by 3,600 to go from kilometers per hour to kilometers per second (1 km/h = 0.000277777777778 km/s).

km/s = km/h ÷ 3,600
km/h = km/s × 3,600

Worked example:

1 km/h = 0.000277777777778 km/s
5 × 0.000277777777778 = 0.00138888888889 km/s

Kilometers per Hour to kilometers per second table

Kilometers per HourKilometers per Second
1 km/h0.000277777777778 km/s
2 km/h0.000555555555556 km/s
3 km/h0.000833333333333 km/s
4 km/h0.00111111111111 km/s
5 km/h0.00138888888889 km/s
6 km/h0.00166666666667 km/s
7 km/h0.00194444444444 km/s
8 km/h0.00222222222222 km/s
9 km/h0.0025 km/s
10 km/h0.00277777777778 km/s
15 km/h0.00416666666667 km/s
20 km/h0.00555555555556 km/s
25 km/h0.00694444444444 km/s
30 km/h0.00833333333333 km/s
40 km/h0.0111111111111 km/s
50 km/h0.0138888888889 km/s
75 km/h0.0208333333333 km/s
100 km/h0.0277777777778 km/s
250 km/h0.0694444444444 km/s
500 km/h0.138888888889 km/s
1000 km/h0.277777777778 km/s

About the units

Kilometers per Hour (km/h)
Kilometers per hour, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
Kilometers per Second (km/s)
Kilometers per second, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).

Formula version 0.1.0Reviewed