CalcuTray is a small, quick and easy to use calculator that lives in the Notification Tray, often called the System Tray, the Systray or ‘by the clock’. With one click of the mouse you have access to a fully functional calculator.  

• + - * / ( ) .
• Convert decimals to fractions: Ctrl F
• Convert fractions to decimals: Ctrl D
• Square root: Ctrl S
• Calculate Pi to 28 places: Ctrl P
• Pi can be used in calculations: e.g 'pi*2=6.28318530717959'


• Full history
• Always on, instant access
• Small memory footprint
• Skins
• Ctrl Alt C quick launch key