How do I convert mph to km/h?

Multiply mph by 1.60934. So 60 mph = 96.56 km/h. To convert the other way, divide km/h by 1.60934.

What's the difference between speed and velocity?

Speed is a scalar — it has magnitude only (e.g., 60 mph). Velocity is a vector — it has both magnitude and direction (e.g., 60 mph north). For everyday calculations, the formula is the same.

Speed Distance Time Calculator

Enter any two values and solve for the third. Supports multiple speed units.

Solve for:

Speed

Distance

Time

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The SDT Triangle

Find	Formula	Example
Speed	S = D ÷ T	150 mi ÷ 2.5h = 60 mph
Distance	D = S × T	60 mph × 3h = 180 miles
Time	T = D ÷ S	240 mi ÷ 60 mph = 4h

Speed Unit Conversions

From → To	Multiply by
mph → km/h	1.60934
km/h → mph	0.62137
mph → m/s	0.44704
knots → mph	1.15078
knots → km/h	1.852

Real-World Speed References

FAQ

What is the speed distance time formula?

Speed = Distance ÷ Time. Rearranged: D = S × T and T = D ÷ S.

How to convert mph to km/h?

Multiply mph by 1.60934. Example: 60 mph = 96.56 km/h.

Speed vs velocity?

Speed is magnitude only. Velocity includes direction. For these calculations, the formula is identical.

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Running pace per mile.

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Days between dates.

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Speed Distance Time Calculator

The SDT Triangle

Speed Unit Conversions

Real-World Speed References

FAQ

Pace Calculator

Unit Converter

Date Calculator

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