Free online scientific calculator with trigonometry, logarithms, and advanced functions.
Our free Scientific Calculator gives you a full-featured mathematical tool right in your browser. From basic arithmetic to trigonometric functions, logarithms, powers, and mathematical constants, this calculator handles the computations you need for school, engineering, science, and everyday problem-solving.
No app to install, no account required — just open the page and start calculating. It works on any device and is available offline once loaded.
A scientific calculator is an advanced calculator that goes beyond basic addition, subtraction, multiplication, and division. It includes functions for trigonometry (sine, cosine, tangent), logarithms (base-10 and natural log), exponentiation, square roots, and mathematical constants like π (pi) and e (Euler's number). These functions are essential for mathematics, physics, chemistry, engineering, and many other technical disciplines.
Traditional scientific calculators are physical devices that students and professionals carry to class or work. A browser-based scientific calculator provides the same functionality without the need to carry a separate device, and it's always available on any computer, tablet, or smartphone with a web browser.
This calculator supports complex expressions with parentheses, allowing you to enter multi-step calculations as a single expression rather than breaking them into separate steps. The display shows your full expression as you build it, so you can review and edit before calculating.
Trigonometric functions in this calculator use radians, not degrees. This is the standard for most scientific and engineering applications. To convert degrees to radians, multiply by π/180. For example, sin(90°) = sin(π/2) ≈ sin(1.5708). If you're working in degrees, convert your angle first before entering it into the sin, cos, or tan functions.
Use parentheses liberally to ensure the correct order of operations. For example, to calculate sin(30° + 45°) in radians, enter sin((0.5236 + 0.7854)) rather than sin(0.5236) + 0.7854, which would give a completely different result. When in doubt, add parentheses — they never hurt and often prevent errors.
The x^y (power) function takes two arguments separated by a comma: the base and the exponent. For example, pow(2, 10) calculates 2 to the power of 10, which equals 1024. You can also use the ** operator directly in expressions for the same result.
Browser-based calculators are convenient because they're always available without needing to find or charge a physical device. This calculator is particularly useful for students who are working on homework at a computer and need quick access to scientific functions without switching to a separate app or device.
The keyboard support makes this calculator faster to use than clicking buttons for users who are comfortable with keyboard input. You can type an entire expression like "sin(1.5708) + log(100)" directly from the keyboard and press Enter to evaluate it, which is much faster than clicking each button individually.
The calculator is lightweight, loads instantly, and works offline. There are no ads interrupting your calculations, no sign-up required, and no data collected. It's a clean, reliable tool that does exactly what a scientific calculator should do.
Your privacy is our priority. All processing happens entirely in your browser using JavaScript. No files, data, or inputs are ever uploaded to any server. Everything stays on your device, making this tool completely safe to use with sensitive content.