A full scientific calculator in your browser
This scientific calculator handles everything the classic handheld does: the four basic operations, powers and roots, logarithms, trigonometry, factorials, parentheses for grouping, the constants π and e, and a memory register. It evaluates expressions using a proper parser that respects the standard order of operations, so 2 + 3 × 4 correctly returns 14, not 20. Everything works on a phone with large touch targets, and on a computer with full keyboard support.
Order of operations
The calculator follows PEMDAS / BODMAS: Parentheses, Exponents, Multiplication and Division (left to right), then Addition and Subtraction (left to right). When in doubt, add parentheses — they make intent explicit and never hurt. For example, to halve a sum write (8 + 4) / 2, not 8 + 4 / 2, which evaluates to 10.
Powers, roots and logarithms
Use xʸ (or the ^ key) for any power: 2^10 = 1024. The √ button is the square root, and x² squares a value. For other roots, raise to a fractional power — the cube root of 27 is 27^(1/3) = 3. The log button is base-10 (log 1000 = 3) and ln is the natural log base e (ln e = 1). These are the operations that turn a basic calculator into a scientific one.
Trigonometry in degrees or radians
Trig is where the DEG/RAD toggle matters most. In DEG mode, sin(30) returns 0.5; in RAD mode, sin(30) treats 30 as radians and returns roughly −0.988. Always check the toggle before a trig calculation. The inverse functions (sin⁻¹, cos⁻¹, tan⁻¹) return an angle in whichever unit you have selected.
Using the memory register
Memory lets you carry a number between calculations without writing it down. Press M+ to add the current result to memory, M− to subtract it, MR to recall the stored value into your expression, and MC to clear it. A small indicator shows the current memory value. It is handy for running totals, like summing several invoice lines that each need their own sub-calculation.
Keyboard shortcuts
On a desktop the keyboard is fastest: type digits and the operators + − * / ^, use ( and ) to group, press the decimal point for fractions, hit Enter or = to evaluate, Backspace to delete the last character, and Escape to clear everything. Function names like sin, log and sqrt can be typed directly too.
Use with the other tools
For dedicated tasks, the exponent calculator shows power steps, the square root calculator gives simplified radicals, and the percentage calculator handles percent maths with the formula shown.