Scientific Calculator
A free online scientific calculator for trigonometry, logarithms, roots, and exponents, right in your browser.
How the Scientific Calculator Works
This online scientific calculator evaluates expressions using standard order of operations (parentheses, exponents, then multiplication/division, then addition/subtraction) and supports trigonometric, logarithmic, and root functions.
sin, cos, tan – trigonometric ratios, calculated in degrees or radians depending on the toggle above.
log(x) – base-10 logarithm.
ln(x) – natural logarithm (base e).
√x, x^y – square root and exponentiation.
Degrees vs. Radians: Most everyday geometry problems use degrees (a full circle = 360°), while calculus and advanced math typically use radians (a full circle = 2π). Switch modes using the toggle at the top of the calculator.
Example: sin(30) in Degree mode returns 0.5, matching the standard trigonometric value for a 30° angle.
How to Use This Scientific Calculator
Choose Degree or Radian mode depending on what your problem requires.
Tap the number and function buttons to build your expression, it appears in the display above.
Use parentheses to control the order calculations happen in, just like on a physical calculator.
Press = to evaluate, or C to start over.
Frequently Asked Questions
What’s the difference between a scientific and a basic calculator?
A basic calculator only handles addition, subtraction, multiplication, and division. A scientific calculator adds trigonometry, logarithms, roots, exponents, and constants like π and e, needed for algebra, geometry, and higher-level math.
Should I use Degree or Radian mode?
Use Degree mode for most everyday and geometry problems. Use Radian mode for calculus, physics, and any problem that explicitly asks for radians.
Does this calculator follow order of operations?
Yes. Expressions are evaluated using standard mathematical order of operations, so parentheses and exponents are resolved before multiplication, division, addition, or subtraction.
Can I calculate negative exponents or roots?
Yes, use the ± key to make a number negative, then apply x^y or √ as needed. For example, 2^-3 correctly returns 0.125.
Is any of my data saved or sent anywhere?
No. This calculator runs entirely in your browser using JavaScript, nothing you type is stored or transmitted.