Speed Comparison

Quantity	Select Unit	Show Dist.

Ma is the speed of sound in air at 20°C. c is the speed of light in a vaccuum. *Sun to planet distances are averages.

Enter a quantity of units to begin
100m Sprint:
¼ Mile Drag Race:
1 Kilometre:
Cross the English Channel:
Run a Marathon:
The Width of Australia:
Sydney to Heathrow:
Once Around the Equator:
1 Light Second:
Earth to the Moon = 1LD:
Earth to the Sun = 1AU:
Sun to Mars:
Sun to Jupiter:
Sun to Pluto:
1 Light Year:
One Parsec:
To Proxima Centauri:
To Large Magellanic Cloud:
To Andromeda Galaxy: