Contact

The fastest way to reach us is email:

hello@workednumbers.com

What to write in about

Found an error? If a formula or result looks wrong, tell us which calculator, what you entered, and what you expected. Verified corrections ship fast and we'll credit you if you'd like.

Want a calculator that doesn't exist yet? Describe the decision you're trying to make and what output would help. The most-requested tools get built first.

Embedding our tools. Bloggers and educators are welcome to embed our calculators using the embed code on each tool page, with attribution intact. Write to us for anything beyond that.

Advertising and partnerships. Use the same address with "Partnership" in the subject line.

We read everything and usually reply within a few business days.