A plain calculator that just adds up
This is the everyday four-function calculator: a number pad, the four arithmetic operators, and an equals key. Tap a digit, pick an operation, tap another digit, and press =. There are no modes to switch, no graphing, and no scientific functions to hunt through — it is built for the quick sums you do dozens of times a day, like splitting a total, adding a column of figures, or checking a receipt without reaching for your phone's app.
Everything you can click, you can also type. The on-screen keys mirror your physical keyboard, so once you know the shortcuts you rarely touch the mouse.
Type it as fast as you can think it
- 0–9 — enter digits
- + - * / — add, subtract, multiply, divide
- Enter or = — show the result
- Backspace — delete the last character you entered
- Escape or C — clear and start over
- . — add a decimal point
Try it: chaining 12 + 7 × 3
Suppose you key in 12, then +, then 7, then ×, then 3, and finally =. This calculator evaluates left to right as you go, the way a basic pocket calculator does: it first works out 12 + 7 to get 19, then multiplies that running total by 3 to land on 57. If instead you wanted 12 added to "7 × 3", you would compute the multiplication first — 7 × 3 = 21 — and then add 12 to reach 33. Knowing which total the calculator is carrying as you press each operator is the whole trick to getting the answer you expect.
Where this calculator stops
Because it works left to right, this calculator does not apply the standard order of operations (PEMDAS/BODMAS) across a whole expression — there are no parentheses and no precedence, so type each step in the order you want it evaluated. It also has no memory keys, no percentage or square-root buttons, and no exponents, so it is the wrong tool for scientific or statistical work. Finally, results use ordinary floating-point arithmetic, so a few divisions can produce a long trailing decimal (0.1 + 0.2 famously lands a hair off 0.3); round the answer yourself when exactness to the penny matters.
Quick answers about the calculator
Does this calculator follow order of operations?
No — it evaluates strictly left to right as you press each operator, like a standard pocket calculator. To force a multiplication or division to happen first, enter that part of the sum before the addition or subtraction.
Can I use my keyboard instead of clicking?
Yes. The number keys, the + - * / operators, Enter for equals, Backspace to delete, and Escape to clear all work exactly like the on-screen buttons.
Why does a division sometimes show a long decimal?
The calculator uses standard floating-point math, so results that are not exact fractions — such as 10 ÷ 3 — show many decimal places. Round the displayed value to the precision you need.
Is the calculator free and does it need an account?
It is completely free, runs entirely in your browser, and needs no download or sign-up. Nothing you type is sent anywhere.