Space Travel Time Calculator

Distance

Distance Unit

Speed (km/s)

Formula

time = distance / speed

How long to travel to Mars?

At 30 km/s it takes about 87 days to cover 225 million km (average Mars distance). Actual missions take 7-9 months due to orbital mechanics.

How long to reach the nearest star?

Proxima Centauri is 4.24 light years away. At 30 km/s it would take about 42,000 years.

Free light travel time calculator. Calculate how long it takes light to travel a given distance.

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