RPN Calculator
Single-file HTML, CSS, and JavaScript version for static hosting.
0 in stack
X
—
Y
—
Z
—
T
—
Entry
Ready
Keypad
AC
CE
⌫
Enter
x↔y
Dup
Drop
R↓
7
8
9
÷
4
5
6
×
1
2
3
−
±
0
.
+
√x
1/x
CHS
How it works
Type a number, press Enter, then use operators on the stack. Example: 2 Enter 3 Enter + gives 5.