Free online scientific calculator with trigonometry (degrees or radians), logarithms, powers, roots, factorials, π, memory and history. Works with your keyboard. Enter your values; the result updates as you type, with the method shown below.
About this calculator
This scientific calculator runs in your browser with trigonometric, logarithmic and power functions, factorials, π, memory keys and an answer key. It works with the keyboard as well as the on-screen buttons.
Type an expression or click the keys, then press = or Enter. Switch between degrees and radians for trigonometry.
When to use it
- Homework and exams practice.
- Engineering and science calculations.
- Quick checks without a physical calculator.
- Working on a phone or a computer.
How to read the result
Operations follow the usual order: powers before multiplication and division, then addition and subtraction. Use brackets when in doubt.
In DEG mode, sin(30) = 0.5; in RAD mode, sin(π/6) = 0.5.
Mistakes to avoid
- Leaving the calculator in the wrong angle mode.
- Forgetting brackets, as in 1/2x.
- Typing a minus sign instead of a negative number in some places.
Formula
( ) → xʸ → × ÷ → + −
Worked example
sin(30) = 0.5 in degree mode; 2^10 = 1,024; 5! = 120; log(1000) = 3.
Frequently asked questions
Degrees or radians?
Tap DEG/RAD to switch. Degrees are the default.
Can I use my keyboard?
Yes: digits, + − × ÷, ^, parentheses, Enter and Backspace work.
What does Ans do?
It inserts the result of the last calculation.
Does it follow the order of operations?
Yes.
How do I use memory?
With the M+ and MR keys.
Can I use the keyboard?
Yes, numbers, operators and Enter work.
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Results are estimates for information only. Check important figures with a professional.