Fcal

Automatically converts between physical units like meters, seconds, and Celsius, as shown in examples such as '20 minutes + 34 day in sec' and '23 C add 123 F'.

Supports variables, functions, percentages, and multiple number systems, enabling intuitive expressions like '23% of 1023' and operations in binary or hexadecimal.

Strict mode enforces type and unit consistency to catch errors early, demonstrated with FcalError providing detailed context for syntax issues.

Allows creating expression objects that can be re-evaluated with different variable values, improving efficiency for repeated calculations as shown in the 'Using expression' section.