How to Use
- 1 Enter your values
- 2 Click the Calculate button
- 3 Get your result instantly
- 4 Reset to calculate again
How to Use the Scientific Calculator
This free online scientific calculator supports basic arithmetic, percentages, trigonometry (sin, cos, tan), logarithms (log, ln), powers (x^y), roots (√), factorial (!), and constants like π and e. Click the buttons or type expressions directly. Press Enter or = to calculate. Use the DEL button to backspace.
Supported Functions
| Category | Functions |
|---|---|
| Basic: +, -, *, /, % | Addition, subtraction, multiplication, division, percentage |
| Powers: x^y, x², √x | Exponentiation, square, square root |
| Trigonometry: sin, cos, tan, asin, acos, atan | sin, cos, tan and their inverses (radians) |
| Logarithms: log (base 10), ln (natural) | Common and natural logarithm |
| Constants: π (pi), e (Euler's number) | π ≈ 3.14159, e ≈ 2.71828 |
| Other: ! (factorial), |x| (absolute value) | Factorial and absolute value |
Frequently Asked Questions
Can I type expressions directly?
Yes. Click any button or use your keyboard. Type sin(45) and press Enter, or click the sin button then type 45. Scientific functions require parentheses, e.g., sin(45) not sin45.
How do I calculate percentages?
Use the % button. For example, to find 15% of 200: click 15, then %, then *, then 200, then =. Result: 30. Or simply type 15*200/100 in the expression field.
How accurate is this calculator?
This calculator uses JavaScript's native Number type, which handles up to 15 significant digits with precision up to about 15 decimal places. For most everyday calculations, this is more than sufficient.
Does it support degrees and radians?
Yes. Trigonometric functions (sin, cos, tan) use radians by default. For degrees, convert first: sin(45 * Math.PI / 180) gives the correct result for 45 degrees. No degree mode toggle is available in this version.
Is there a memory function?
No memory (M+, M-, MR, MC) buttons are available in this version. Use your browser's copy/paste or the display area to hold intermediate values.