Your input stays on your device
The utility tools run in your browser. What you type is processed on your device and is not uploaded or stored by the tool. You do not need an account.
Where the formulas come from
We use standard formulas and published definitions. Tool pages list official sources where they apply, such as government agencies and technical standards, so you can check the rules yourself. Utility pages show a worked example and, where one applies, the formula.
How we test the tools
Each tool has automated tests with normal inputs, edge cases and invalid inputs that must return a clear error. Tests run before every release. Results are checked against independently calculated values and published test vectors, such as those for hash functions, where they exist.
What the results are, and are not
Financial and health results are general estimates based only on what you enter. They are not financial, tax, legal or medical advice. Rules vary by person and place, so confirm important decisions with a qualified professional.
Found a mistake?
Tell us at x@snowrock.com and include the tool name and the input you used. We fix confirmed errors and update the page.
Last updated October 30, 2026.
All SnowRock tools