Speed Guides

Guides for mph, km/h, knots, meters per second, and travel or technical speed context.

Guides In This Topic

These pages explain when different speed units are used and how to compare them safely.

When you already know the exact task, move from these support pages into the direct conversion or formatting tools.

Convert miles per hour into kilometres per hour. Mile means the international statute mile.

Convert a metric road-speed value into miles per hour. Mile means the international statute mile.

Convert metres per second into kilometres per hour. SI distance and fixed-time relationship.

Express a kilometre-per-hour speed in metres per second. SI distance and fixed-time relationship.

Compare a nautical or aviation speed with statute miles per hour. Knot uses the exact nautical mile; mph uses the exact international statute mile.

Express statute miles per hour as knots. Knot uses the exact nautical mile; mph uses the exact international statute mile.