Scientific Calculator
Type a whole calculation — with parentheses, powers, and functions like sin, cos, log and square root — and get the answer instantly. Use your physical keyboard or the buttons below.
How to use the scientific calculator
- Type a calculation directly with your keyboard, or build it up with the buttons — both work together in the same field.
- Press "=" or Enter to calculate. The next number you type starts a new calculation, while an operator (+, −, ×, ÷) continues from the result — just like on a regular calculator.
- Press "Scientific" for trigonometry, logarithms, factorial, memory functions and "Ans" (last result). "2nd" switches sin/cos/tan/log/ln to their inverse functions.
Expressions with parentheses and implicit multiplication
The calculator reads a whole mathematical expression at once, not just one operation at a time — you can type (2+3)*sin(45) or 2π (automatically read as 2×π) directly. Precedence follows normal math rules: powers before multiplication/division, which in turn come before addition/subtraction, and parentheses override everything.
The % button uses the mathematical definition (x% = x/100), not the "increase by" trick some four-function calculators use — see the FAQ below for why.
Frequently asked questions
How do I type parentheses and functions?
Type directly into the field with your keyboard, or use the buttons. You can mix freely: (2+3)*sin(45) works, and so does 2π (automatically read as 2×π) and 3(4+5) (read as 3×(4+5)).
What does the %-button mean — is it "add 10%" or "divide by 100"?
This calculator uses the mathematical definition: x% means x divided by 100, exactly like on physical scientific calculators (Casio, TI). 200+10% therefore becomes 200.1, not 220. Simple four-function calculators (like Windows' standard mode) often use a context-sensitive "increase by" interpretation instead.
What's the difference between Deg and Rad?
Deg (degrees) and Rad (radians) are two ways of measuring angles. sin(90) in degree mode gives 1, while sin(90) in radian mode gives something completely different since 90 radians is a huge angle. Choose Deg for everyday angles in degrees (0–360), Rad if you're working with π-based angles.
Is my calculation history stored anywhere?
No. The history and memory only live in your browser tab and disappear when you reload or close the page — nothing is sent to any server.