About Tallyworks
Tallyworks is a free collection of more than 200 online tools: everyday and scientific calculators, financial calculators (mortgage, loans, savings, retirement), health and fitness calculators (BMI, calories, body fat, pregnancy dates), math tools, unit converters, timers, clocks and a few games. The site is published at freeaicourses.site.
What makes it different
- No accounts and no sign-up. Every tool is free to use.
- Your numbers stay with you. The calculators run in your own browser. The values you type are not sent to our server.
- Works on phones, tablets and desktops. The layout adapts to your screen.
- 13 languages. English, Spanish, French, German, Portuguese, Italian, Dutch, Russian, Turkish, Arabic, Hindi, Chinese and Japanese. Use the language menu at the top of the page.
- Keyboard friendly. The basic and scientific calculators accept digits, operators, Enter, Backspace and Escape.
How the tools are built
The calculators use standard, publicly known formulas, for example the standard loan-payment formula, the Mifflin-St Jeor equation for basal metabolic rate and the Heron formula for triangle area. Each tool states its inputs and shows its results. Where a result is only an estimate, the tool says so.
Calculators are a guide, not a replacement for professional advice. Please read our Disclaimer.
Found a mistake or have an idea?
We want the tools to be right. If a result looks wrong, or you would like a calculator added, tell us through the Contact page. Include the tool name, the values you entered and what you expected.