Free online scientific calculator with trigonometry, logarithms, powers, roots, factorials, memory, and more. Full keyboard support. Works on any device.
CalcBee's scientific calculator is a powerful, free online tool that handles everything from basic arithmetic to advanced mathematical functions. Built for students, engineers, scientists, and anyone who needs more than a simple calculator, it offers trigonometric functions, logarithms, powers, roots, factorials, and much more — all in your browser with no downloads required.
The calculator supports both degree and radian modes for trigonometric calculations, has a full memory system (MC, MR, M+, M−), and maintains a history of your last 30 calculations that you can click to reuse. It handles complex expressions with parentheses and proper operator precedence, so you can type expressions naturally just like you'd write them on paper.
Whether you're working through homework, doing lab calculations, checking engineering formulas, or just need to compute something more complex than basic arithmetic, this scientific calculator has you covered. Full keyboard support means power users can work at maximum speed.
Yes, completely free. No sign-up and no download required. Just open the page and start calculating. It works in any modern web browser on phones, tablets, and desktop computers.
Click the DEG or RAD button at the top of the calculator. DEG mode is the default and uses degrees for all trigonometric functions. RAD mode uses radians. The current mode is highlighted.
Click the INV button to toggle inverse mode. The trig function labels will change to sin⁻¹, cos⁻¹, tan⁻¹ (and their hyperbolic equivalents). Click INV again to return to normal mode.
MC clears the memory. MR recalls (inserts) the stored value. M+ adds the current result to memory. M− subtracts the current result from memory. When memory contains a value, it's displayed in the memory row.
Yes! You can type full expressions like "sin(45)×(3+2)" using the buttons or keyboard. The calculator follows standard mathematical operator precedence: parentheses first, then exponents, then multiplication/division, then addition/subtraction.
As you type an expression, the calculator shows the evaluated result in real time below the expression. This lets you see the answer before pressing equals, so you can verify your expression is correct on the fly.
Yes. The history panel on the right (or below on mobile) shows your last 30 calculations. Click on any result to insert it into the current expression. This makes it easy to chain calculations together.
Yes! CalcBee offers thousands of specialized calculators for finance, health, business, construction, and more. Visit our calculator directory to find exactly what you need.