About Us
ToolUstad is a free collection of online tools. Calculators, converters, generators and checkers for everyday jobs, from counting words and formatting JSON to working out a mortgage payment or a paint budget.
Every tool runs in your browser with JavaScript. Nothing you type, paste or open is uploaded to a server or stored by us, and there is no sign-up, no account and no cost. Open a tool, use it, and copy or download your result.
The tools are built for the United States first: US units, dollars, tax years and market rates. Where a calculator uses a rate or a price, the value we checked and the date we checked it are shown next to it, with a link to the page where you can check the current figure.
Found a mistake, or want a tool we do not have yet? Use the Report an Issue box on any tool page, or email us at [email protected].