Scientific Calculator
A free scientific calculator in your browser: trig, logs, powers and roots.
Type on your keyboard or tap the buttons. Press Enter to calculate. Angles for sin, cos and tan are in degrees.
A free in-browser scientific calculator — no signup, no app to install, and your calculations never leave your device. It follows the usual order of operations (brackets, powers, then multiplication/division, then addition/subtraction), and angles for sin, cos and tan are in degrees.
What is a scientific calculator?
A scientific calculator handles the maths a basic calculator cannot: trigonometry, logarithms, powers, roots, factorials and constants such as π and e — all in your browser, free, with no signup. Type an expression or tap the buttons, press equals, and the result appears with the answer saved as Ans for your next calculation.
It evaluates expressions properly, not left to right: 2+3*4 gives 14, not 20, because multiplication comes before addition, and (2+3)*4 gives 20 because brackets come first. Powers are right-associative, so 2^3^2 means 2^(3^2) = 512. Functions include square root, log base 10, natural log (ln), sin, cos and tan in degrees with their inverses, exp, 1/x, and factorial (5! = 120).
Division by zero, the square root of a negative number, and log of zero or a negative number are shown as clear errors instead of a misleading number. The calculator is a general-purpose study and homework tool; always follow your exam's own rules about which calculators are allowed in the room.
How to use the scientific calculator
A full scientific calculator in your browser — no app, no download. Type an expression or tap the buttons: basic arithmetic, powers, square roots, logarithms (log and ln), trigonometry (sin, cos, tan and their inverses, in degrees), exponentials, factorials, π and e, and parentheses for grouping. The Ans key reuses your last answer.
Two things to remember: trig functions use degrees, not radians, and division by zero is an error, not a number. Everything runs in your browser — nothing you type is sent anywhere.
Need statistics instead? Try the average calculator or the standard deviation calculator.
How to use the scientific calculator
- Type an expression in the display, or tap the buttons to build it — for example 2+3*4 or sin(30).
- Press = or the Enter key to calculate. The result is saved as Ans for your next calculation.
- Use C to clear the display and ← to delete the last character.
- Remember that angles are in degrees: sin(30) = 0.5. Use brackets to control the order of operations.
Frequently asked questions
Does this calculator follow the order of operations?
Yes. Brackets first, then powers, then multiplication and division, then addition and subtraction. So 2+3*4 = 14, and (2+3)*4 = 20.
Are sin, cos and tan in degrees or radians?
Degrees. sin(30) = 0.5 and cos(60) = 0.5. The inverse functions (sin⁻¹, cos⁻¹, tan⁻¹) also return degrees.
What is the difference between log and ln?
log is log base 10 (log(100) = 2), and ln is the natural logarithm, log base e (ln(e) = 1). Both are defined only for numbers greater than zero.
What does Ans do?
Ans holds the result of your last calculation. Tap Ans (or type it) to reuse that number in a new expression without retyping it.
Why does 1/0 show an error?
Division by zero has no defined answer in ordinary arithmetic, so the calculator shows a clear error instead of displaying Infinity as if it were a result.
Can I use this calculator in an exam?
That depends on your exam board's rules — many allow scientific calculators but ban internet-connected devices. Check your exam's calculator policy before test day.
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