Area
Rectangle area calculator
Quick calculator for simple room, floor and material estimates.
Last updated: April 2026
Enter length and width to calculate the area.
Why this calculator matters
A rectangle area tool is simple, but it gets used constantly for flooring, paint, rugs, worktops, desks and room planning. Most people do not need a CAD package for that. They need a plain answer.
Use the result as a starting point, then add waste or extra margin where a project requires it.
Typical use cases
- room planning
- flooring estimates
- paint and coverage planning
- desk and worktop sizing