WiseCalcs

Basic calculator

Enter two numbers and pick an operation. The calculator returns the result instantly, handling division by zero as undefined.

Use it for quick arithmetic on two numbers.

Result

96

The result updates as you type. Choose add, subtract, multiply, or divide and the answer appears at once.

How does it work?

Dividing by zero is undefined and shown as a dash. Results display up to six decimals.

Basic arithmetic

r=a  □  b,□∈{+, −, ×, ÷}r = a \;\square\; b,\quad \square \in \{+,\,-,\,\times,\,\div\}
a, b
The two numbers.
r
The result of the chosen operation.

12 × 8 = 96. Choosing divide with 96 and 8 gives 12.

Method & sources

Two numbers are combined with the chosen operation. Operations are add, subtract, multiply, and divide. Dividing by zero is undefined and shown as a dash.

How we calculate

  • Two numbers are combined with the chosen operation.
  • Operations are add, subtract, multiply, and divide.
  • Dividing by zero is undefined and shown as a dash.

Rounding

Results display up to six decimals. The calculation uses full precision.

What this calculator does

This is a clean, no-frills calculator for the four basic operations on two numbers. Enter the values, choose the operation, and read the result — useful when you just need a single, accurate calculation without a full keypad.

How to use it

  1. Enter the first number.
  2. Pick add, subtract, multiply, or divide.
  3. Enter the second number.
  4. Read the result.

A worked example

12 × 8 = 96. Switch to divide with 96 and 8 and the result is 12.

Dividing by zero

Division by zero has no defined value, so the calculator shows a dash rather than an error or infinity. Any other operation always returns a number.

Common mistakes

  • Mixing up the order for subtraction or division — order matters.
  • Expecting a result when dividing by zero.
  • Reading a rounded display as the exact value for long decimals.

When it's useful

A fast single calculation, double-checking mental arithmetic, or a shareable result via a link.

FAQ

Which operations are supported?
Addition, subtraction, multiplication, and division of two numbers.
What happens if I divide by zero?
It's undefined, so the calculator shows a dash instead of a number.
Does order matter?
For subtraction and division, yes: the second number is taken from or divides the first.
How precise is the result?
It's calculated at full precision and displayed to up to six decimals.
Can I chain calculations?
This does one operation at a time. Use the result as the first number of the next calculation.
Can I share a calculation?
Yes. Use Share to copy a link that reopens the calculator with the same numbers and operation.

Related calculators

Embed this calculator

Add this calculator to your own site. The snippet includes the calculator iframe and a small attribution link:

<iframe src="https://wisecalcs.com/embed/en/basic-calculator" width="100%" height="520" style="border:0" loading="lazy"></iframe> <p>Calculator from <a href="https://wisecalcs.com/en/math/basic-calculator">WiseCalcs</a></p>