Help keep the tools free
Every calculator, practice question and guide on this site is free. There are no ads, no sign-up and no paywall. One person builds and maintains all of it, and this page is for anyone who wants to help that keep going.
Thank you for your support.
The best help costs nothing
- Try an app. The apps are what pay for everything else on the site. If one is useful on the job, a rating on Google Play helps more than you would think. See the apps
- Subscribe on YouTube. Short walkthroughs of the calculators and guides. Open the channel
- Pass it along. Tell a coworker or an apprentice, or share a calculator you use. That is how a small site like this gets found.
- Report what is wrong. A figure that looks off, a code section that changed, a calculator you wish existed. Corrections are the most useful thing anyone can send. Send a note
Where contributions go
- Hosting and the domain.
- Keeping the tax tables and trade-code references up to date.
- Time to build the next calculators, guides and apps.
Nothing is locked behind a contribution, and none of the free tools will ever need one.