Speed Converter
Calculate speed instantly with our math tool. Shows detailed work, formulas used, and multiple solution methods. See charts, tables, and visual results.
Reviewed by Manoj Kumar, Mathematics Educator
Formula
1 m/s = 3.6 km/h = 2.237 mph = 3.281 ft/s = 1.944 knots
Meters per second is the SI unit for speed. Multiply by the appropriate factor for each target unit: 3.6 for km/h, 2.237 for mph, 3.281 for ft/s, 1.944 for knots, or divide by 343 (the approximate speed of sound at sea level) for a Mach number.
Worked Examples
Example 1: Highway Driving Speed
Problem:Convert 27.78 m/s, a common highway cruising speed, to km/h, mph, and knots.
Solution:km/h = 27.78 × 3.6 = 100.01 km/h\nmph = 27.78 × 2.23694 = 62.14 mph\nknots = 27.78 × 1.94384 = 53.99 knots
Result:27.78 m/s = 100 km/h = 62.14 mph = 53.99 knots
Example 2: Sprinter Top Speed
Problem:A sprinter reaches a peak speed of 12.4 m/s. Express this in km/h and mph.
Solution:km/h = 12.4 × 3.6 = 44.64 km/h\nmph = 12.4 × 2.23694 = 27.74 mph\nMach = 12.4 / 343 = 0.0362
Result:12.4 m/s = 44.64 km/h = 27.74 mph (Mach 0.036)
References
Reviewed by Manoj Kumar, Mathematics Educator · Editorial policy