Contact

Found a bug or want a calculator added? Write to hello@oddscalculator.urbansmartguide.com.

Formula corrections get priority — every page shows its math, so errors are checkable, and we fix them fast. If a calculation disagrees with your book's own display, send both numbers and we will trace which rounding convention differs.

Requests for new calculators are welcome; the ones we build tend to be the ones readers keep asking about, with the formula printed on the page from day one.