Mathematics & calculation

Perimeter of a Square Calculator (Side or Diagonal)

Calculate the perimeter of a square from its side (P = 4s) or its diagonal (P = 2√2 × d). Formulas explained, finding the side from the perimeter, edging and fencing examples, in the length unit of your choice.

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<div
  class="bethemesh-widget"
  data-tool="square-perimeter-calculator"
  data-lang="en"
  data-theme="auto"
  data-min-height="360"
  data-max-height="760"
  data-sandbox="allow-scripts allow-same-origin"
  data-allow="clipboard-write"
></div>
<script src="https://bethemesh.com/widgets/v1/bethemesh.js" async></script>
<p style="margin:6px 0 0;font:12px/1.4 system-ui,sans-serif">Free tool by <a href="https://bethemesh.com/en/tools/square-perimeter-calculator">Bethemesh</a></p>

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Perimeter of a Square Calculator (Side or Diagonal)

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