Average Speed Calculation
- suppose we want to calculate Usain Bolt average speed
during his world record winning 100 m sprint race in Berlin August 16, 2009 (this is default calculation
displayed when you enter the page). What do we know?
- We want to calculate Bolt's average speed
- The distance was, of course, 100 meters
- Bolt ran the distance in 9.58 seconds.
So, we have to (1) check the radio button 'Compute Speed', (2) input 100 as a value of distance and set units of the distance to meters.
(3) input 9.58 seconds into Time input box (be careful of time notation, to set seconds you have to type ::9.58 or 0:0:9.58, 9.58 with no colons ':'
means 9.58 hours, with one preceding colon means 9.58 minutes).
Calculator answers in input box labeled 'speed'. Note, that you can choose desired unit of speed
and, for example, if you set units to yards per second, you get the answer: Bolt ran 11.42 yards per second during the race.
Setting meters per second, you get 10.44 mps; miles per hour - 23.35 mph; kilometers per hour - 37.58 kmh; etc.
Travel Time Calculation
- Suppose, you drove 21 miles with average speed 45 miles per hour.
How long did you drive? To solve this problem, simply:
- Check radio button 'Calculate Time'.
- Type 21 into input box labeled 'Distance' and set distance unit to miles
- Type 45 into input box labeled 'Speed' and set speed units to miles per hour
The calculator displays the answer in input box labeled 'Time' as 00:28:00 which means you traveled 28 minutes.
- Let's calculate, how many miles you can travel, driving 2 hours and 30 minutes
with the average speed 55 miles per hour? To answer the question, you should:
- Check the 'Calculate Distance' radio box and set units to miles
- Type 2:30:00 into 'Time' input box
- Type 55 into 'Speed' box and set units to miles per hour
As you can see, the answer is 137.5 miles or 221.28 kilometers or 119.48 nautical miles etc.