➗ Rectangle Area Calculator
Calculate rectangle area from length and width.
Result
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How this calculator works
Calculate rectangle area from length and width.
Formula
A=lw
Example
12 × 5 gives area 60.
Frequently asked questions
What does the Rectangle Area Calculator do?
Calculate rectangle area from length and width.
Are the results exact?
The calculator follows the displayed formula. Rounded display values may differ slightly from full-precision results.
Can I use negative or decimal values?
Most fields accept decimals and negative values when they make sense for the formula.
How should I check an important result?
Review the formula, verify your entries, and confirm high-stakes work with a qualified teacher or professional.