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Why Toolvik Pro
Exact, tested answers
Every calculator is checked against hand-worked examples and shows its working step by step.
Your data stays with you
Everything is calculated on your device. No sign-up, no tracking — nothing you type leaves your phone.
Your language, your numbers
20 languages, local digits and decimal styles, and right-to-left layouts for Arabic, Urdu and Persian.
Questions about the site
Are these calculators free?
Yes. Every calculator is free to use, with no sign-up and no limits.
Is my data saved or sent anywhere?
No. Calculations run in your browser. Only your language, theme and recent calculations are kept on your own device, and you can clear them at any time.
Are the results exact?
Yes. Every calculation uses exact arithmetic. When a decimal never ends, like 1 ÷ 3, the repeating digits are shown with a line over them (0.3̅), so nothing is rounded. Each answer also shows how it was worked out.
The site is in the wrong language. How do I change it?
Press the language button at the top (the globe) and choose your language. The site remembers it on this device.