CalcSolver Pro
Free Calc Solver & Scientific Calculator Online
CalcSolver Pro
Free Calc Solver & Scientific Calculator Online
Full-function trig, log, powers, roots and constants - runs entirely in your browser, no signup needed.
Use Calculator ↓A scientific calculator is an advanced calculator that goes beyond the four basic operations to include trigonometry, logarithms, powers, roots, factorials and mathematical constants. It is the standard tool for high school and college mathematics, physics, engineering, chemistry and any subject where calculations involve angles, exponential growth or complex expressions. This calculator gives you the full set of functions in your browser - no app download, no account, no waiting.
Everything here works exactly as it would on a physical Casio or Texas Instruments scientific calculator, including the DEG and RAD angle modes that are a common source of confusion for students using a scientific calculator for the first time.
Type a number using the numpad and then tap the function you want. For trigonometry - enter the angle first, then press sin, cos or tan. The calculator starts in DEG mode, so sin(30) gives 0.5 and cos(60) gives 0.5. Switch to RAD mode when your problem works in radians. To raise a number to a custom power, type the base, press xʸ, type the exponent, then press equals. Use the parenthesis buttons to group parts of an expression the same way you would write them on paper.
The green display shows your running expression on the top line and the result below. AC clears everything. The backspace button deletes the last character. The keyboard works too - digits, operators, Enter for equals, Backspace to delete, and Escape to clear.
Every button on the calculator and what it does, with a quick example for each.
| Button | What it does | Example |
|---|---|---|
| sin / cos / tan | Trigonometric functions (angle → ratio) | sin(30) = 0.5 |
| sin⁻¹ / cos⁻¹ / tan⁻¹ | Inverse trig - returns the angle from a ratio | sin⁻¹(0.5) = 30° |
| x² | Squares the current number | 9² = 81 |
| x³ | Cubes the current number | 4³ = 64 |
| xʸ | Raises x to any custom power y | 2^10 = 1024 |
| √ | Square root | √144 = 12 |
| ∛ | Cube root | ∛27 = 3 |
| log | Base-10 logarithm | log(1000) = 3 |
| ln | Natural logarithm (base e) | ln(e) = 1 |
| log₂ | Base-2 logarithm | log₂(1024) = 10 |
| n! | Factorial - multiplies every integer from 1 to n | 7! = 5040 |
| 1/x | Reciprocal of the current number | 1/4 = 0.25 |
| π | Inserts pi (3.14159...) | π × 2 = 6.2831 |
| e | Inserts Euler's number (2.71828...) | ln(e) = 1 |
Because it runs entirely in your browser, there is nothing to install and it works on any device - phone, tablet or desktop. The CRT-style display makes it easy to track what you have typed and what the result is. The expression line at the top shows your full input so you can spot mistakes before you press equals. Switching between DEG and RAD mode is a single tap, and the mode label stays visible at all times so you never lose track of which mode is active.
Unlike many online calculators that only handle one operation at a time, this one lets you chain operations, use parentheses, and reference constants like π and e directly in your expressions. The keyboard shortcut support means you can type calculations as fast as you would on a physical calculator without reaching for the mouse.
Angle mode controls how the calculator interprets numbers passed to trig functions. In DEG mode, numbers are treated as degrees - the full circle is 360. In RAD mode, numbers are treated as radians - the full circle is 2π, roughly 6.28. Most school problems and everyday geometry use degrees. Radians are standard in calculus, physics formulas and most programming libraries. A very common mistake is calculating a trig value in the wrong mode: sin(90) in DEG mode gives 1, but sin(90) in RAD mode gives 0.894 because 90 radians is a different angle entirely. The mode indicator next to the DEG/RAD buttons always shows which is active.