NumberCals

Rhombus Area Calculator

Calculate area of a rhombus from its two diagonals, plus perimeter from the side length.

About this calculator

The Rhombus Area Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to calculate area of a rhombus from its two diagonals, plus perimeter from the side length. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.

Formula used

A = ½·d₁·d₂; P = 4s

What you'll need

  • Diagonal 1 (e.g. 12)
  • Diagonal 2 (e.g. 8)

What you'll get

  • Area
  • Side Length
  • Perimeter
Formula
A = ½·d₁·d₂; P = 4s

Frequently Asked Questions

Why are the diagonals enough? +

A rhombus's diagonals bisect each other at right angles, so each side is √((d₁/2)² + (d₂/2)²).

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