Free Scientific Calculator Online – Solve Math Problems
A scientific calculator with trigonometry, logarithms, powers and constants.
About the Scientific Calculator
What is the Scientific Calculator?
A scientific calculator evaluates expressions with trigonometric functions, logarithms, roots, powers, constants and factorials.
Why use this calculator?
Engineering, physics and higher maths need more than basic arithmetic. Text-based input avoids hunting across dozens of buttons.
How to use it
- Type an expression using any of the supported functions.
- Trigonometry uses degrees by default (sin(30) = 0.5).
- pi and e are available as constants.
- Use ! for factorial and ^ for powers.
Formula
Result = evaluation of the expression under standard precedence.
arcsin/arccos/arctan return answers in degrees. Domains are enforced with friendly errors.
Frequently Asked Questions
Does trig use degrees or radians?
Degrees for input functions and degrees for inverse-function output, which suits most everyday uses.
Can I use scientific (E) notation?
Yes, numbers like 1.5e3 or 2e-4 are supported inside expressions.
What order of operations does this use?
It follows standard PEMDAS/BODMAS rules: parentheses, exponents, multiplication and division, then addition and subtraction.
How precise are the answers?
The calculator uses double-precision floating-point math (about 15 significant digits) and rounds the display. For exact symbolic results use dedicated algebra software.
Can I enter negative numbers or decimals?
Yes. Negative values, decimals and very large or small numbers are all supported unless a field says otherwise.
What does it mean if I get an error?
Errors usually mean an invalid input, such as division by zero or a negative value where only positives make sense. Check your entries and try again.
Is this calculator free to use?
Yes. Every calculator on this site is completely free, with no hidden fees, no subscriptions and no limits on how many times you can use it.
How accurate are the results?
We use standard, widely accepted formulas and calculate in your browser using double-precision arithmetic. Results are rounded for readability, so treat them as reliable estimates rather than a guarantee. Real-world factors can vary the true figure.
Can I add this calculator to my own website?
Yes. Open this calculator page and use the "Add to your website" box in the sidebar to copy a ready-made iframe snippet, then paste it into any HTML page.
Does it work on a phone or tablet?
Yes. The layout is fully responsive, so it works on desktops, laptops, tablets and mobile phones, and every input adapts to touch screens.