Trigonometry
sin, cos, tan and their inverse functions. Switch between Degree and Radian mode instantly with one tap.
What Is an Online Scientific Calculator?
An online scientific calculator is a powerful web-based mathematical tool designed to handle far more than simple addition and subtraction. Unlike a basic calculator, it supports a wide spectrum of advanced operations including trigonometric functions (sine, cosine, tangent and their inverses), logarithmic calculations (natural log and base-10 log), exponential functions, factorials, square and cube roots, and constants like π and Euler's number e. Engineers, students, scientists, and mathematicians rely on these tools daily.
Our free online scientific calculator eliminates the need for a physical device. It runs entirely in your browser — on any device, any screen size — with zero installation required. Switch seamlessly between Degree and Radian modes for angular calculations, store values in memory for multi-step problems, and view a running history of your expressions. Whether you're solving complex equations, verifying homework, or performing quick on-the-job calculations, this tool delivers precise, instant results with a clean and intuitive interface optimised for speed and usability.
Capabilities
Everything You Need in One Calculator
50+ mathematical functions available at your fingertips, free forever.
Logarithms & Exponentials
Natural log (ln), base-10 log, log₂, and eˣ for engineering, science, and data calculations.
Powers & Roots
Square, cube, nth power, square root, cube root, and custom exponents with the xʸ function.
Memory Functions
MC, MR, MS, M+, M− memory operations to store and recall values across multi-step computations.
Calculation History
Every expression and result is logged so you can track your work without pen and paper.
Mobile Optimised
Perfectly responsive layout for smartphones and tablets — no overflow, no horizontal scroll.
Expression Input
Type complex expressions directly for rapid entry with real-time parenthesis validation.
Light & Dark Theme
Toggle between comfortable dark mode and clean light mode. Preference saved automatically.
FAQ
Frequently Asked Questions
What is a scientific calculator and what can it do?+
A scientific calculator extends basic arithmetic with advanced functions including trigonometry, logarithms, exponentials, roots, factorials, and more. It's used by students, engineers, scientists, and anyone working with complex numerical data.
How do I enter a calculation using the keypad?+
Tap buttons on the calculator keypad to build your expression. The display shows your input in real time. Press '=' to calculate. You can also type directly into the expression input box and press Calc.
What is the difference between DEG and RAD mode?+
DEG (Degrees) and RAD (Radians) determine how angles are interpreted in trigonometric functions. For everyday use, DEG is common — sin(90°)=1. RAD is standard in maths and physics — sin(π/2)=1. Toggle with the DEG/RAD button.
Can I use keyboard shortcuts?+
Yes! Click in the expression input box and type full expressions using your keyboard. Press Enter to evaluate. Operators +, -, *, / and function names like sin(), cos(), log() are all supported.
Is this scientific calculator free?+
Completely free. No subscription, no sign-up, no watermarks. This online scientific calculator is available 24/7 on all devices and will remain free forever.
Explore More Free Tools
Over 100 calculators, converters, and AI-powered utilities — all free, all instant.