Note: Trigonometric functions use Degrees by default. Switch to RAD for radians. All calculations run locally in your browser.
Frequently Asked Questions
What is the difference between DEG and RAD mode?▼
DEG (Degrees) mode interprets trigonometric function inputs in degrees (0-360°). RAD (Radians) mode uses radians (0-2π). Most high school math uses degrees, while calculus and advanced mathematics use radians. Use the toggle button to switch between modes.
How do I use the memory functions?▼
MS stores the current display value to memory. MR recalls the stored value. M+ adds the current value to memory. M- subtracts the current value from memory. MC clears the memory. An 'M' indicator appears when memory contains a value.
How do I calculate powers and exponents?▼
Use the x^y button for any power (e.g., 2 x^y 3 = 8). Use x^2 for squares, x^3 for cubes, and 10^x for powers of 10. The EXP button calculates e^x (Euler's number raised to a power).
What is the factorial function (n!)?▼
The factorial function (n!) multiplies all positive integers from 1 to n. For example, 5! = 5x4x3x2x1 = 120. This calculator supports factorials up to 170! which is the maximum JavaScript can accurately compute.
Can I use keyboard shortcuts with this calculator?▼
Yes! You can use your keyboard: numbers (0-9), operators (+,-,*,/,^), parentheses (()), Enter or = for equals, Backspace for delete, and Escape for clear. The calculator works just like a physical calculator with keyboard support.
Free Scientific Calculator Online
This free online scientific calculator handles everything from basic arithmetic to advanced mathematics. It supports trigonometric functions — sine, cosine and tangent — in both Degrees and Radians modes, making it ideal for students, engineers and scientists. Logarithmic functions including log base 10, natural log (ln) and log base 2 are all included, along with powers, square roots, cube roots and factorial calculations.
Use the built-in memory system (MC, MR, MS, M+, M-) to store and recall values across multiple calculations. Constants like pi and e (Euler's number) are available at one tap. Your full calculation history is saved on screen so you can review or recall any previous result instantly. The calculator works completely offline with no data sent to any server — fully private and free forever.
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