Scientific Calculator
A full scientific calculator right in your browser โ no app needed.
What is it?
A scientific calculator is a more advanced version of a standard calculator, designed to handle complex mathematical functions that go beyond basic arithmetic. While a regular calculator handles addition, subtraction, multiplication and division, a scientific calculator adds trigonometric functions (sin, cos, tan), inverse trig functions (arcsin, arccos, arctan), logarithms (log base 10 and natural log), exponential functions, square roots, cube roots, arbitrary powers, factorials, and constants like ฯ (pi) and e (Euler's number). This free online scientific calculator replicates all of these functions in a clean, easy-to-use interface that works on any device โ desktop, tablet or mobile โ without installing any app. It also keeps a calculation history so you can review previous results, and supports both Degree and Radian mode for trigonometric functions. Scientific calculators are essential tools in mathematics, physics, engineering, chemistry, finance and statistics. Students use them for exams and homework, while professionals rely on them for quick calculations during analysis work.
How to use it
- Use the number pad and operator keys just like a standard calculator for basic arithmetic.
- For trigonometric functions, press sin, cos or tan, then enter the angle value in parentheses.
- Toggle between Degree and Radian mode using the DEG/RAD button at the top.
- Use the log button for base-10 logarithm and ln for natural logarithm.
- Press xยฒ to square a number, xสธ to raise to any power, or โ for square root.
- Use the ฯ and e buttons to insert the respective constants.
- Your calculation history appears below the display โ click any previous result to reuse it.
Why use this tool
Many people reach for a scientific calculator when solving math problems, but a physical calculator is not always at hand โ and phone apps often have cluttered interfaces full of ads. This free online scientific calculator is clean, fast and ad-free, loading instantly in any browser. The calculator handles the full set of functions you would expect from a quality scientific calculator: trigonometry in both degrees and radians, logarithms, exponents, factorials, constants and memory functions. The history panel saves every calculation so you can review your work without re-entering numbers. Because it is entirely browser-based, it works offline once the page loads, and your calculations stay completely private โ nothing is sent to any server. No sign-up, no download, no installation, no cost.
Frequently asked questions
What is the difference between DEG and RAD mode?
DEG (degree) mode measures angles in degrees (0โ360 for a full circle). RAD (radian) mode measures angles in radians (0โ2ฯ for a full circle). Use DEG for everyday geometry and most school problems; use RAD for calculus and physics. The sin, cos and tan functions give different results depending on the mode.
How do I calculate sin(30ยฐ)?
Make sure you are in DEG mode, then press sin, type 30, and press = or close the parenthesis. The result is 0.5.
What does the ln button do?
ln is the natural logarithm โ the logarithm with base e (Euler's number, approximately 2.71828). It is widely used in calculus, physics and finance (compound interest, exponential growth). The log button computes log base 10.
How do I calculate a factorial (n!)?
Enter the number and then press the n! button. For example, 5! = 5 ร 4 ร 3 ร 2 ร 1 = 120. Factorials grow very quickly โ most calculators can only handle up to about 170!
Can I use the calculator on my phone?
Yes. The layout automatically adapts to mobile screen sizes. All functions are accessible on a touchscreen, and the display is large enough to read comfortably.