A clean, fast basic calculator for everyday arithmetic. Add, subtract, multiply and divide with keyboard support and calculation history. Works on any device, no signup needed.
⌨️ Keyboard supported · Enter = result · Esc = clear
A simple online calculator is one of the most frequently needed tools for students, professionals, shopkeepers, and everyday users. Whether you need to quickly add up a list of expenses, divide a bill between friends, check a calculation from a receipt, or do any basic arithmetic on your phone, having a fast and reliable calculator available in your browser saves time and avoids errors.
Our simple online calculator supports all four basic arithmetic operations:
The calculator also supports the percentage (%) button for quick percent calculations, the +/− toggle to switch between positive and negative numbers, and decimal point input for fractional values.
Unlike a standard pocket calculator, our online calculator keeps a record of your recent calculations on screen. This history panel shows each expression and its result, so you can review your work without recalculating. This is especially useful when doing multiple related calculations in a sequence, such as adding up a shopping list or calculating several installment amounts.
For users on a desktop or laptop, our calculator fully supports keyboard input. You can type numbers directly, use the standard arithmetic keys (+, −, *, /), press Enter for the result, and press Escape or C to clear. This makes it much faster to use than clicking buttons when you have a physical keyboard available.
Your phone's built-in calculator is always available, but there are several advantages to using an online calculator while already browsing the web:
Using this calculator is exactly like using a standard pocket calculator. Click number buttons to enter values, click an operation button (÷, ×, −, +) to choose the operation, enter the second number, and press the = button to see the result. Use AC to clear everything and start fresh. Use the % button to calculate a percentage of the current number. Use +/− to make a positive number negative or vice versa.
Your results automatically appear in the history panel on the right (or below on mobile), so you can always refer back to previous calculations without redoing them.
This calculator is completely free and works on all modern browsers on mobile phones, tablets, and desktops. No app download, no account creation, and no internet data is sent — all calculations happen locally in your browser.
If you need beyond basic arithmetic, SolveFlow has a full set of free math and utility calculators available on the homepage. These include a percentage calculator for finding percent values, an average calculator for statistical analysis, an age calculator for date-based calculations, and many more tools for finance, health, text processing, and unit conversions.