Online scientific calculator
Solve expressions with trigonometric functions, logarithms, powers, roots and factorials right in your browser.
You can use your keyboard: Enter calculates, Esc clears and ⌫ deletes the last character.
History
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Scientific calculator: what it is and how it works
A scientific calculator extends basic arithmetic with the functions used in maths, physics, chemistry and engineering: trigonometry (sine, cosine, tangent and their inverses), common, natural and base-2 logarithms, powers and roots, factorial, absolute value and the constants π and e.
You can type complete expressions with brackets, such as 2 × sin(30) + √(16), and the calculator follows the order of operations. The DEG/RAD button switches angles between degrees and radians. Ans recalls the last result and EXP lets you enter numbers in scientific notation, such as 6.02E23. The history keeps your calculations while the page is open.
How to use it
- Choose degrees (DEG) or radians (RAD) for trigonometric functions.
- Type the expression with the keys or your keyboard, using brackets if needed.
- Press = or Enter to see the result and reuse it later with Ans.
Order: brackets → functions → powers → × ÷ → + −Worked example
In DEG mode, 2 × sin(30) + √(16) = 2 × 0.5 + 4 = 5. In RAD mode, cos(π) = −1. And 5! = 120.
Frequently asked questions
How do I switch between degrees and radians?
Press the DEG/RAD button on the display. In DEG, sin(90) gives 1; in RAD, sin(π/2) gives 1.
How do I calculate other roots?
Use fractional powers: the fifth root of 32 is 32^(1/5) = 2. For cube roots there is the ∛ key.
What is the difference between log and ln?
log is the common logarithm (base 10) and ln the natural logarithm (base e ≈ 2.71828). log₂ is base 2.
Can I use scientific notation?
Yes. Press EXP to enter numbers like 1.5E3, which equals 1.5 × 10³ = 1500.