Feet per second to Kilometers per hour Converter

Speed conversion · Updated 2026-10-04

Converting feet per second to kilometers per hour is a multiplication by a fixed factor: 1 ft/s = 1.09728 km/h. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.

Because one foot per second works out to 1.09728 km/h, the kilometer per hour is the slightly larger unit of the two: a figure given in kilometer per hour always carries a larger number than the same measurement in foot per second. A chart drawn in ft/s can hide that, so check which label the axis uses before you compare two readings.

In engineering, kinematic figures quoted in feet per second often have to be restated in kilometers per hour before they can be compared with a manufacturer curve.

The conversion factor used here is 1.09728 km/h per foot per second (5 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 ft/s a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.9113444 ft/s per km/h, the exact reciprocal, so a round trip through both pages returns your original number.

Feet per second to Kilometers per hour formula

Use this formula to convert any foot per second value to kilometers per hour:

Worked example: 100 ft/s × 1.09728 = 109.728 km/h.

Feet per second to Kilometers per hour conversion table

Feet per second (ft/s)	Kilometers per hour (km/h)
0.5 ft/s	0.54864 km/h
1 ft/s	1.09728 km/h
2 ft/s	2.19456 km/h
5 ft/s	5.4864 km/h
10 ft/s	10.9728 km/h
20 ft/s	21.9456 km/h
50 ft/s	54.864 km/h
100 ft/s	109.728 km/h
500 ft/s	548.64 km/h
1000 ft/s	1097.28 km/h

How to convert feet per second to kilometers per hour

Multiply the foot per second value by 1.09728 to get the equivalent in kilometers per hour. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.

If you need the opposite direction, use the Kilometers per hour to Feet per second converter instead of dividing by hand; both pages use the same source factors. For every other ft/s conversion in one place, see the ft/s conversion hub.

Frequently asked questions

How many kilometers per hour are in 1 foot per second?
1 foot per second = 1.09728 km/h.

What is 100 feet per second in kilometers per hour?
100 ft/s = 109.728 km/h.

Is converting feet per second to kilometers per hour the same as kilometers per hour to feet per second?
No — the direction changes the multiplier. The reverse conversion (1 km/h = 0.9113444 ft/s) is on the Kilometers per hour to Feet per second page.

Related conversions

Try the ConvBolt Unit Converter for any other speed unit, browse the Speed conversions, or read our conversion guides.