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Rectangle Perimeter Calculator

units
units

Result

Calculated result 32 Based on the values entered.
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Rectangle Perimeter Calculator — free online calculator.

Formula

Perimeter = 2(Length + Width)
  • Rectangle Perimeter Calculator calculates its result from Length (units), Width (units). It uses the formula Perimeter = 2(Length + Width). Change any input to recalculate the result instantly.
  • The main inputs are Length, Width. Enter them in the units and format shown in the calculator.
  • Keep comparable quantities in compatible units whenever the formula combines or compares them.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Rectangle Perimeter

Inputs
  • Length: 10 units
  • Width: 6 units

Using Length (units) = 10, Width (units) = 6, the calculated result is 32.

Sample result: Calculating…

Frequently asked questions

What does the Rectangle Perimeter calculate?

Rectangle Perimeter Calculator — free online calculator.

Which values should I enter?

Enter Length, Width using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Perimeter = 2(Length + Width).

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026