Scientific Calculator
Free online scientific calculator with trig, log, and exponential functions. Switch between degree and radian modes instantly.
What is a scientific calculator?
A scientific calculator is an electronic tool designed to perform advanced mathematical calculations beyond basic arithmetic, including trigonometric functions, logarithms, exponential functions, and statistical operations.
How is a scientific calculator different from a regular calculator?
A regular calculator handles basic operations like addition, subtraction, multiplication, and division. A scientific calculator adds advanced functions such as sin, cos, tan, logarithms, exponents, roots, factorial, and constants like π and e.
What functions does this scientific calculator support?
It supports basic arithmetic, trigonometric functions (sin, cos, tan and their inverses), logarithms (ln, log10), exponentials, square root, nth root, factorial, powers, constants (π, e), and parentheses for expression grouping.
How do I use trigonometric functions like sin, cos, and tan?
Enter the angle value, then press the desired trig function button (sin, cos, or tan). Make sure the angle mode (degree or radian) matches your input. For example, sin(30) in degree mode returns 0.5.
What is the difference between degree and radian mode?
In degree mode, angles are measured in degrees (a full circle is 360°). In radian mode, angles are measured in radians (a full circle is 2π). Trigonometric functions use the selected mode to interpret angle values.
How do I calculate logarithms?
Use the ln button for natural logarithm (base e) and the log button for common logarithm (base 10). Enter the number first, then press the log or ln button to get the result.
What is the factorial function and when is it used?
Factorial (n!) is the product of all positive integers up to n. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120. It is commonly used in probability, combinatorics, and series expansions.
Can I use keyboard input?
Yes, you can type numbers and operators directly using your keyboard. Press Enter to evaluate the expression, Escape to clear the display, and Backspace to delete the last character.
How accurate is this calculator?
This calculator uses IEEE 754 double-precision floating-point arithmetic, providing approximately 15 to 16 significant digits of precision. This is sufficient for most scientific, engineering, and educational calculations.
Is this scientific calculator free to use?
Yes, it is completely free with no registration required. It works directly in your web browser on any device — desktop, tablet, or mobile.
How to Use Scientific Calculator
A scientific calculator for trigonometry, logarithms and powers that works entirely in your browser. Switch between degree and radian modes at any time.
- Press DEG or RAD to set whether the sin, cos and tan keys treat angles as degrees or radians.
- Tap 2nd to switch to the alternate functions, then use sin, cos or tan for the inverse trig operations.
- Insert the constants π and e, and compute with ln for natural logarithms or log for base-10.
- Use xʸ for powers and √ for square roots, chaining operations exactly as on a handheld calculator.
If a trig result looks wrong by a large factor, check the DEG/RAD toggle first — 30 degrees equals roughly 0.5236 radians.
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