Scientific Calculator
Trigonometry, logarithms, powers & roots
How to Use
- 1Choose the angle mode: Deg, Rad or Grad.
- 2Type your expression using numbers & functions.
- 3Use ( ) to group and set the calculation order.
- 4Press = for the result, or AC to clear.
Calculation History
- Your recent calculations will appear here.
Quick Examples
Tap an example to try it out.
Everything about the Scientific Calculator
A quick, practical guide to getting the most out of the calculator.
A scientific calculator is an advanced calculator built to handle far more than everyday addition and subtraction. Alongside the four basic operations, it can compute trigonometry (sin, cos, tan), logarithms, exponents and roots, factorials, and mathematical constants like π and e. It's the standard tool for high‑school maths, college science and engineering, and this online version runs free in your browser, on any device, with nothing to install.
Unlike a basic 4‑function calculator, a scientific calculator automatically follows the correct order of operations (BODMAS / PEMDAS), so an expression like 2 + 3 × 4 is evaluated as 14, not 20. You can also group terms with parentheses to control exactly how a calculation is worked out.
Tip: Always set the angle mode (Deg / Rad / Grad) before using sin, cos or tan, because the same input gives a different result in each mode.
How to use this calculator
- 1 Pick your angle mode
Choose Deg, Rad or Grad before using trigonometric functions, because the result of sin, cos and tan depends on it.
- 2 Type your expression
Enter numbers and functions in order, using parentheses ( ) for grouping just as you would write it on paper.
- 3 Add scientific functions
Tap sin, cos, log, √, xⁿ, π and more to insert advanced operations into your expression.
- 4 Press = for the answer
Hit equals to evaluate. Use AC to clear everything, or ⌫ to delete the last entry.
Common functions at a glance
Frequently Asked Questions
What is a scientific calculator used for?
It's used for calculations that go beyond basic arithmetic: trigonometry, logarithms, exponents, roots, factorials, scientific notation and constants such as π and e. That makes it essential for maths, physics, chemistry, engineering and any field that involves advanced formulas.
How is a scientific calculator different from a normal calculator?
A normal (4‑function) calculator only does addition, subtraction, multiplication and division. A scientific calculator adds trig functions, logs, powers, roots and more, and it automatically respects the order of operations (BODMAS/PEMDAS) and parentheses, which a basic calculator does not.
What do Deg, Rad and Grad mean?
They are the three ways of measuring angles. Deg (degrees) splits a circle into 360 parts, Rad (radians) uses 2π for a full circle and is standard in higher maths, and Grad (gradians) splits a circle into 400 parts. Always set the correct mode before using sin, cos or tan, or you'll get the wrong answer.
Does the calculator follow the order of operations (BODMAS / PEMDAS)?
Yes. Expressions are evaluated using the standard order of operations: brackets first, then exponents and roots, then multiplication and division, and finally addition and subtraction. Use parentheses ( ) whenever you need to force a particular grouping.
How do I calculate powers and roots?
Use the xⁿ (or x^y) key to raise a number to any power. For example 2 xⁿ 10 gives 1024. Use the √ key for square roots, and combine it with powers for other roots. The x² key is a quick shortcut for squaring a value.
Is this scientific calculator free and does it work on mobile?
Yes. It's 100% free, needs no sign‑up and no download. It works in any modern browser and is fully responsive, so it fits phones, tablets and desktops. Your calculations stay in your browser; nothing is stored or shared.