Keyboard Shortcuts

When using the calculator on a desktop, laptop, or tablet web browser, you can use your physical keyboard for faster interaction. All keyboard input goes to the active display field.

Input

Key	Action
0 – 9	Enter the corresponding digit
.	Insert decimal point
Backspace	Delete the last character (backspace)
Escape	Clear all fields and reset (same as C button)
C or c	Clear all fields and reset (same as C button)

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Arithmetic

Key	Action
+	Add operator
-	Subtract operator
*	Multiply operator
/	Divide operator
%	Percent (tax calculation or percentage of operand)
Enter or =	Evaluate / equals

Navigation

Change which field is active (the anchor):

Key	Action
Tab	Cycle to the next field (Before → After → Amount → Back to Before)
Shift + Tab	Cycle to the previous field
ArrowUp or k	Previous field
ArrowDown or j	Next field

Nudge

Fine-tune the active field by one cent (1¢):

Key	Action
ArrowLeft	Nudge down (decrease active field by 1¢)
ArrowRight	Nudge up (increase active field by 1¢)
Shift + ArrowUp	Nudge up
Shift + ArrowDown	Nudge down
Shift + H	Nudge down (vim-style)
Shift + L	Nudge up (vim-style)
d or D	Toggle calculation direction (additive, subtractive)

Nudge only works on the Before and After fields. It has no effect when Amount is active.

Notes

• The calculator must have focus to receive keyboard input. Click anywhere on the page first.
• Nudge and navigation keys still work when a display field is not visibly highlighted (e.g., after an arithmetic operation).
• All keyboard interactions prevent the default browser behavior (for example, the Arrow keys do not scroll the page).
• The Delete key is intentionally ignored to prevent accidental data loss.