Convertools

Rectangle Perimeter Calculator

Calculate rectangle perimeter from length and width using P = 2(l + w).

Author

Dr. Isabella Rossi

Math editorial contributor

Italian neuroscientist at Sapienza University of Rome, studying the neural mechanisms of bilingual language processing

Reviewed by

Dr. Samuel Okafor

Math content reviewer

Nigerian-Canadian data scientist with a PhD from the University of Toronto, building ML models for early cancer detection

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

Table of Contents

  1. Reference values
  2. Calculator
  3. Reference table
  4. FAQs
  5. Methodology and review
  6. Related conversions

5 units Length; 6 units Width =

22 units

Representative value from the Rectangle Perimeter Calculator reference table.

Reference Values

Browse 25 reference values with individual detail pages for quick lookup.

Browse all reference values

Rectangle Perimeter Calculator

Calculate rectangle perimeter from length and width using P = 2(l + w).

Calculated Result

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Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Rectangle Perimeter Calculator Reference
ScenarioRectangle Perimeter
1 units Length; 1 units Width4 units
1 units Length; 3 units Width8 units
1 units Length; 6 units Width14 units
1 units Length; 12 units Width26 units
1 units Length; 24 units Width50 units
2 units Length; 1 units Width6 units
2 units Length; 3 units Width10 units
2 units Length; 6 units Width16 units
2 units Length; 12 units Width28 units
2 units Length; 24 units Width52 units
5 units Length; 1 units Width12 units
5 units Length; 3 units Width16 units
5 units Length; 6 units Width22 units
5 units Length; 12 units Width34 units
5 units Length; 24 units Width58 units
10 units Length; 1 units Width22 units
10 units Length; 3 units Width26 units
10 units Length; 6 units Width32 units
10 units Length; 12 units Width44 units
10 units Length; 24 units Width68 units
20 units Length; 1 units Width42 units
20 units Length; 3 units Width46 units
20 units Length; 6 units Width52 units
20 units Length; 12 units Width64 units
20 units Length; 24 units Width88 units

Frequently Asked Questions

Common questions about Rectangle Perimeter Calculator, formulas, and typical use cases.

What does the Rectangle Perimeter Calculator calculator do?

It helps with estimating border length, trim, fencing, and perimeter measurements.

What formula does the Rectangle Perimeter Calculator calculator use?

Rectangle perimeter = 2 × (length + width).

What inputs are valid?

Length and width should be zero or greater. Physical dimensions are typically positive.

When would I use this?

estimating border length, trim, fencing, and perimeter measurements

Methodology and Review

This page combines a live calculator, precomputed reference values, and FAQ content from the same conversion definition to reduce mismatch between calculator output and lookup tables.

Editorial metadata (author, reviewer, and update date) is rendered on the page and in structured data. See our editorial policy, review process, and corrections policy.

For compliance-sensitive work, verify final values against project requirements, governing standards, and manufacturer documentation.