adder70 once bubbled...
OK, if all of the SI measurements are so neat, how many liters in a cubic meter? The liter is a superfluous measurement devised only to make daily life easier. Since a cubic meter is fairly large, the term liter was devised for a common size of container.
Well, a litre = 1 dm3. 1m3 = 1000 dm3. 1m3 = 1000 litres.
The Fahrenheit/Celsius difference is because 0F is not 0C. 15C is 59F, or 27F above freezing (0C). 30C should be 54F which would be 86F. Now I get my trusty HP calculator back out and it says...86!!
The thing is, remembering some Celsius things are much easier. Like freezing is 0. Not 32. And pure water boiling at sea level is 100. Not 212.