A fast, free online calculator
This is a simple online calculator for everyday arithmetic — addition, subtraction, multiplication and division — plus common functions. It works instantly in your browser with no download or sign-up, and supports keyboard input so you can type calculations directly.
For scientific functions like trigonometry, logarithms and powers, try the scientific calculator. For a specific task, browse our dedicated calculators for finance, health, dates and more.
Frequently asked questions
Is this calculator free?+
Yes. It is completely free to use with no sign-up, no download and no limits. Every calculator on TheCalculate works instantly in your browser.
Can I use my keyboard with the calculator?+
Yes. You can type numbers and operators (+, −, ×, ÷), press Enter or = to calculate, and use Escape or Delete to clear the current entry.
Does the calculator work offline?+
Once the page has loaded, basic calculations run entirely in your browser, so they keep working even with a poor connection. You can also install TheCalculate as an app for offline access.