Math
Standard Calculator
Tap numbers and operators just like a phone calculator to add, subtract, multiply, divide, and work with percentages.
Inputs
Results
Useful next checks
- Use the result to check your working or homework.
- Change one input at a time to see how the answer moves.
- Read the method below if you want the steps.
Intro
Use this standard calculator for quick arithmetic with a phone-style keypad. It is built for everyday totals, decimal calculations, percentages, and simple checks when you do not need a specialist calculator.
What this calculator does
Tap the digits and operators to build a calculation, then press equals for the result. The keypad supports addition, subtraction, multiplication, division, decimals, sign changes, backspace, clear, and percentage conversion.
It is useful for:
- Adding or subtracting quick totals.
- Multiplying quantities by a price or rate.
- Dividing a total between people.
- Converting a number to a percentage before using it in a calculation.
- Checking small arithmetic without opening a spreadsheet.
How it works
The calculator reads the expression shown on the display and evaluates it with standard arithmetic precedence:
- Multiplication and division are calculated before addition and subtraction.
- Decimal values are treated as normal numbers.
- The percent key converts the current number to its decimal percentage value.
For example, pressing `50`, `%`, `×`, `80`, `=` calculates 0.5 × 80, which gives 40.
Example calculation
If you enter `12 + 7 × 3`, the calculator multiplies first:
7 × 3 = 21
12 + 21 = 33
The displayed result is 33.
How to use the result
Use the result as a quick arithmetic answer, then switch to a more specific calculator if the question has extra context. For example, use the percentage calculator for percentage wording, the tip calculator for bills, or the loan calculator for repayment estimates.
Assumptions and limitations
- Division by zero is not allowed.
- Very long decimals may be rounded for display.
- The calculator is for general arithmetic and does not include scientific functions such as sine, cosine, logarithms, or memory keys.
- Results are calculated in the browser and are not saved.
FAQs
- Is this the same as a phone calculator? It has the same everyday keypad feel, with the common clear, backspace, sign, percent, operator, and equals controls.
- Does the percent key add a discount automatically? No. It converts the current number to a percentage value. For discounts, use the Discount Calculator.
- Why did multiplication happen before addition? This calculator follows standard order of operations, so multiplication and division are evaluated before addition and subtraction.
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Frequently asked questions
What can this standard calculator do?
It handles addition, subtraction, multiplication, division, decimals, negative numbers, and percentage conversion.
Does it follow order of operations?
Yes. Multiplication and division are evaluated before addition and subtraction.
Can I divide by zero?
No. Division by zero is undefined, so the calculator shows an input error.