The Basic Calculator is designed for one quick step at a time, not for entering a long formula. It provides:
+, subtraction −, multiplication ×, and division ÷;±;√ for non-negative real values;MC, MR, M+, and M- memory keys;It is a good fit for shopping totals, bill checks, budgets, homework verification, and short chained calculations. It is not a scientific calculator or a parenthesized expression parser with variables and functions.
Use the number keys to enter an integer or decimal. A number accepts one decimal point. The ± key toggles the sign of the current display; zero is not changed into negative zero.
It supports step-by-step addition, subtraction, multiplication, division, square root, sign change, memory keys, and recent-history review.
No. It does not parse one long expression; chained key presses are evaluated from left to right, so 12 + 7 × 2 becomes 38 after 12 + 7 is evaluated first.
Memory, history, and the last result are stored in localStorage in the current browser; the share link contains only the memory parameter, not the full history.
Division by zero and the square root of a negative real number show Error; press Clear to start again.
Use a scientific or expression calculator when you need trigonometry, logarithms, powers, parentheses, variables, permutations, combinations, or other functions.
Quickly handle addition, subtraction, multiplication, division, square root, and sign changes with MC/MR/M+/M-, history, keyboard input, and fullscreen mode.