Convert miles per hour to metres per second

One mile per hour is 0.44704 metres per second. To convert any amount, multiply by 0.44704. Going the other way, one metre per second is 2.23693629 miles per hour.

Multiply the mile per hour figure by 0.44704. So m/s = mph × 0.44704. For a quick mental estimate, dividing by about 2.24 gets you close enough for most everyday purposes.

One mile per hour is 60 mph is a typical highway speed. Miles per hour is the road-speed unit in the United States and the United Kingdom, and in both it is what appears on the speedometer regardless of what the road signs say elsewhere.

One metre per second is about walking pace is 1.4 m/s. Metres per second is the SI unit and the one physics uses, because it composes cleanly with the other base units. Wind speeds in meteorology are often reported this way.

Yes. Since the 1959 international yard and pound agreement, the imperial and metric systems are related by exact definitions rather than measurements — the inch is exactly 25.4 mm and the pound exactly 0.45359237 kg. Everything derived from those, including this conversion, is therefore exact. Round at the end rather than partway through, since rounding mph before converting introduces an error the conversion then multiplies.