Open the calculator from the toolbar button. It stays alongside your layout so you can calculate while you measure.
Standard
Add, subtract, multiply, divide and percent. Decimal mode is a normal calculator. Fraction mode takes whole numbers with fractions, such as 3 1/2 for three and a half inches. There are backspace and all-clear keys.
Converter
Convert between inches, feet, feet-inches, fraction (inches), decimal (inches), millimeters, centimeters and meters. It updates as you type, a swap button flips the units and quick cards show common conversions.
Square footage
Enter a width and height in decimal or fractions and it shows the formula and the area in square feet, with square meters beside it. Good for a room, a wall or an opening.
History
The last 50 calculations are kept with times. Recall one to reuse it, or clear the list. Your last calculation is still there when you come back.