RPN Calculator
Type numbers and press Enter to push. Operators run immediately on keypress.
Stack (bottom → top)
Entry
Enter
CE
7
8
9
4
5
6
1
2
3
dup
0
.
+
−
×
÷
pow
√
sq
sin
cos
tan
log
ln
inv
neg
swap
drop
clear
clr
π
e