Online Calculator

Yes. It evaluates the whole expression using standard precedence rather than left to right, so 2 + 3 x 4 gives 14, not 20. Multiplication and division are applied before addition and subtraction, so the whole expression is resolved the way it would be on paper.

Most basic calculators evaluate strictly left to right as you press keys, so they return 20 for 2 + 3 x 4. Scientific and expression calculators, including this one, apply precedence and return 14. Both are working correctly — they are answering different questions.

Yes, and it is much faster. Type digits and operators directly, press Enter or = to evaluate, Escape to clear, and Backspace to delete the last character. Every on-screen button has a keyboard equivalent.

The % key converts the number before it into a fraction of a hundred, so 50 % becomes 0.5. That means 200 x 50 % gives 100, which is the common use — taking a percentage of a value.

Yes. Each result you confirm with = is added to the history panel, and you can copy any earlier result or clear the whole list. Nothing is uploaded — the history exists only in the page you have open.

No. The history is held in memory for the current session only, so refreshing or closing the tab clears it. Copy anything you need to keep before you leave the page.

The calculator reports an error rather than showing Infinity or a misleading number. Division by zero is undefined in ordinary arithmetic, so there is no correct value to display.

It uses the same double-precision floating point every browser and spreadsheet uses, which is accurate to roughly fifteen significant digits. That is far beyond everyday needs, but it means a few decimal fractions cannot be represented exactly — see the next answer.

Because binary floating point cannot represent 0.1 or 0.2 exactly, in the same way decimal cannot write one third exactly. The true sum is 0.30000000000000004. Every mainstream calculator and programming language has this property; results are rounded for display so you rarely see it.

This calculator has no bracket keys — it applies standard precedence to a single expression instead. When you need a different order, evaluate the inner part first with =, then carry on with the result. So for (2 + 3) x 4, enter 2 + 3 =, then x 4 =.

Multiply by one plus the increase as a decimal. A 15% increase on 2,400 is 2400 x 1.15 = 2,760. For a decrease, subtract instead: a 15% discount is 2400 x 0.85 = 2,040.

For a 12% tip on 850, either compute 850 x 12 % to get the tip alone, or 850 x 1.12 for the total including it. Discounts work the same way with subtraction.

Yes. Use the copy button beside the display to copy the current result, or copy any earlier line from the history. It goes to your normal clipboard, so it pastes anywhere.

Yes, once the page has loaded. Everything runs in your browser with no server involved, so it keeps working if your connection drops.

Completely. There is no sign-up, no download and no limit on how much you use it.

No. The arithmetic happens in your browser and nothing you enter is sent to us. That is also why the history lives in the open page rather than in an account.

Yes. The keypad scales to the screen and the buttons stay large enough to tap accurately, and the history panel moves below the keypad on narrow screens.

This one handles general arithmetic. For a specific job, ToolAdda has dedicated tools that show the working — a percentage calculator, EMI and home loan calculators with full amortisation schedules, a GST calculator and an income tax calculator. They are linked below.