Enter an expression and calculate when ready. Scientific functions and degree/radian controls stay available without crowding everyday arithmetic.
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A displayed number can look correct while still differing from a reference value. Check absolute and relative error, then inspect how rounding at several decimal places changes the reported result.
| Decimals | Rounded value | Rounding delta | Reference check |
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Tolerance is a verification rule, not extra precision. Choose tolerances from the domain or specification that produced the number.
Enter or edit the expression, then press = or Enter. Changing the expression clears the previous answer so an old result is never shown beside new inputs.
The keypad supports ordinary arithmetic, parentheses and percentages. Scientific functions are available in the expandable section, and Degrees/Radians controls trigonometric angle interpretation.
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