We've found a really useful online calculator that we thought we'd share with you. It's called Instacalc and what makes it so noteworthy is its ease of use. All you have to do is type into one of the fields and the answer magically appears. For instance, to convert Celsius to Farenheit, just type 21 C as F and the answer 69.8 F appears.

Go to www.instacalc.com and give it a try. We hope you find it useful.