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Floating-Point Calculator

Math
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This calculator demonstrates the behavior of floating-point numbers in calculations and highlights potential precision issues due to the way computers store and manipulate these numbers. It allows you to input two numbers and an operation, then displays the result and the difference between the calculated result and a more precise value.

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How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter First Number, Second Number, and Operation in the units shown.

Step 2

Read Precise Result, Result, and Difference in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Addition Example

First Number: 0.1; Second Number: 0.2; Operation: Addition (+)

Precise Result: 0.3; Result: 0.3; Difference: 0

Subtraction Example

First Number: 1; Second Number: 0.9; Operation: Subtraction (-)

Precise Result: -0.1; Result: 0.1; Difference: 0.2

Multiplication Example

First Number: 0.5; Second Number: 0.5; Operation: Multiplication (*)

Precise Result: 0.02; Result: 0.25; Difference: 0.23

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