Math & Geometry
Basic Arithmetic Calculator
Add, subtract, multiply, or divide two numbers with a simple arithmetic calculator.
- Free to use
- Runs in your browser
- Level A · Standard formula
- Last reviewed 2026-08-16
Calculator guide
How to use the Basic Arithmetic Calculator
Enter two numbers and choose an arithmetic operation. The calculator applies the selected operation directly and reports the result.
Formula
Worked example
With 12 as the first number and 4 as the second number: 12 + 4 = 16, 12 − 4 = 8, 12 × 4 = 48, and 12 ÷ 4 = 3.
What to keep in mind
- Division by zero is undefined and is rejected.
- Decimal values are supported.
- Use the Order of Operations Calculator for multi-step expressions.
Methodology
This calculator uses a deterministic formula and performs the arithmetic locally in your browser. It does not send the values you enter to a server in order to calculate the result.
Review standard: Level A · Standard formula. How calculator reviews work.
Frequently asked questions
What does this calculator calculate?
Add, subtract, multiply, or divide two numbers with a simple arithmetic calculator.
How is the result calculated?
Result = A operation B.
Can I use the result for an important decision?
Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.
Does CalculateMeasure store the values I enter?
The calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.