User Guide
OverviewYou can use PatternMaking Calculator to perform standard operations for which you would normally use a handheld calculator. This calculator performs basic arithmetic, such as addition, subtraction, multiplication, and division. 

To Perform a simple calculation.


To switch between Unit of Measurement (CM or Inch) 

To convert to other unit of measurement, select the target unit. 1 INCH = 2.54 CM 

To Type In a Fractional Number 

Decimal Fraction: e.g. 5.5 

Simple Fraction: e.g. 5.5 

Radius From Inner CircleTo calculate radius of a full, 3/4, half, or quarter circle, type in the length of the perimeter and press one of these buttons. 

Radius From Full Inner Circle 

Radius From ThreeQuarter Inner Circle 

Radius From Half Inner Circle 

Radius From Quarter Inner Circle 
Using keyboard equivalents of Calculator buttons
The following is an alphabetical list of Calculator buttons and their keyboard equivalents.
Button 
Key 
Button 
Key 
% (percent) 
% 
Back 
Backspace 
x (multiplication) 
* 
C (Clear All) 
Esc 
+ (addition) 
+ 
CE (Clear Entry) 
Del 
+/ (reverse sign) 
+/ 
M+ (Add to Stored Number) 
CtrlA 
 (substraction) 
 
M (Substract from Stored Number) 
CtrlS 
. (decimal point) 
. or , 
MC (Clear Stored Number) 
CtrlC 
: (division) 
/ 
MR (Recall Stored Number) 
CtrlR 
09 (digit) 
09 
PI (Constant PI) 
p 
1/x (inverse) 
i 
Sqrt (SquareRoot) 
q 
= 
= or [Enter] 