MakeMyCalculator.com

CALCULATOR

Square Inches of a Circle Calculator

Find disk area from radius in inches. Example: Radius: 2 in gives 12.5663706144 in². Radius, not diameter, in inches. Flat Euclidean shape; stated measurements in displayed units. No waste, thickness, structural suitability or curved-earth claim. Floating point rounding is display only.

YOUR INPUTS Live calculation

Radius, not diameter, in inches. Flat Euclidean shape; stated measurements in displayed units. No waste, thickness, structural suitability or curved-earth claim. Floating point rounding is display only. Derivation: Disk area πr² in coherent inch units.

Accepted inputs: Radius: 0.001 to 1,000 in.

Example values. Enter your own inputs.

disk area from radius in inches

12.56637061in²
Add to project +Customize with AI →

How the calculation works

area in² = π radius in²

Worked example

With radius 2 in, disk area from radius in inches is 12.56637061 in².

Assumptions and limits

Radius, not diameter, in inches. Flat Euclidean shape; stated measurements in displayed units. No waste, thickness, structural suitability or curved-earth claim. Floating point rounding is display only. Derivation: Disk area πr² in coherent inch units.

Related calculators

Circle Area CalculatorTriangle Area CalculatorCylinder Volume CalculatorSphere Volume CalculatorArea of a Circle CalculatorVolume of a Rectangular Prism CalculatorSurface Area of a Cube CalculatorTriangle Area from Two Sides and Included Angle Calculator
disk area from radius in inches12.56637061 in²
Edit inputs ↑

Embed this calculator

Paste this snippet into your site. The widget is free and ad-free, opens with your current inputs, and keeps a link back to this calculator.