Has anyone else been to DigitalRebellion.com? The online tools that they have, as shown above, are really pretty incredible, useful, and— and this will be a total Godsend for most people — mobile-compatible. So if you have a connection to the internet (or the offline version of a couple of the tools), you need never be confused by pesky math on set ever again.

Thanks DigiReb! I just gave you a hip, young, abbreviated name in appreciation.