Google Calculator + Free text entry
For those of you who don’t use Google Calculator – you should. It’s amazing. I use it all the time for conversions. All you have to do is enter the units you’re converting into a google search, and one of the top results will be the Calculator interpretation of your search.
For instance, when SCPing files, I wanted to estimate how long the transfer would take for x gigabytes. I noticed that, on average, I was getting about 11 MB/s. I could do the conversion to GB/h by hand if I wanted to, but there’s really no reason to when Google does such a good job.
There are hundreds of converter programs around the Internet, but what makes Google’s so powerful is that it’s smart enough to interpret your plain text queries; you don’t need to waste time selecting units from drop downs, or anything like that. This same power of free-text entry and parsing applies to a lot of google products, especially Google maps.