Age calculator
Your exact age on any date, from your DOB.
Open toolRectangle calculator
Find area, perimeter and diagonal.
Your input stays in this browser. No account needed.
THE QUICK GUIDE
How to use rectangle calculator
Enter the labelled values, then process it. Copy or download the result.
How it works
Area = width × height; perimeter = 2(width + height); diagonal uses Pythagoras.
A useful example
Width: 8; Height: 6 → Area: 48 Perimeter: 28 Diagonal: 10
Good to know
Use consistent units and currency. These are general calculations; verify important results.