Scientific Calculator

How to Use the Scientific Calculator

This scientific calculator handles everyday arithmetic as well as advanced functions used in algebra, trigonometry, and engineering. Type numbers using the on-screen keypad or your keyboard, then apply operators like plus, minus, multiply, and divide, or reach for a scientific function such as sine, cosine, logarithm, or square root.

The calculator keeps a running calculation history so you can review earlier results without redoing the math, and the memory keys (M+, M-, MR, MC) let you store a value and recall it later in a longer calculation. The DEG/RAD toggle switches trigonometric functions between degrees and radians, which matters when you are working with angles versus circular measurements.

Common calculations explained

Trigonometric functions (sin, cos, tan): used to find angles or side lengths in triangles, common in geometry, physics, and construction. Make sure DEG or RAD mode matches what your problem expects.

Logarithms (log, ln): log calculates the base-10 logarithm, while ln calculates the natural logarithm (base e). These are used in fields like finance, chemistry (pH calculations), and computer science.

Factorial (n!): multiplies a number by every positive integer below it (e.g., 5! = 5 x 4 x 3 x 2 x 1 = 120), commonly used in probability and combinatorics.

Key Functions

• Trigonometric: sin, cos, tan and their inverses, in degrees or radians
• Logarithmic: log (base 10), ln (natural log)
• Powers & Roots: exponents (xʸ), square root, cube root
• Constants: π (pi), e (Euler's number)

Need to convert a result into words for a document? Use the built-in "Convert Result to Words" option, or try our dedicated Number to Words Converter. For date-based math, see the Date Calculator.

Example

To calculate sin(30°): switch to degree mode, enter 30, press sin → result 0.5. To calculate log(1000): press log, enter 1000 → result 3 (since 10³ = 1000).

Learn more: How to Use a Scientific Calculator: A Beginner Guide and Order of Operations Explained, and Logarithms and Exponents Explained for Scientific Calculator Users

Frequently Asked Questions

Is this scientific calculator free to use? Yes, it's completely free with no sign-up required, and works on desktop and mobile browsers.

Does it save my calculation history? Your history is stored locally in your browser session so you can review recent calculations, but it is not saved permanently to any server.

What's the difference between DEG and RAD mode? DEG (degrees) is the everyday unit for angles (a full circle is 360°), while RAD (radians) is the unit used in most advanced math and physics (a full circle is 2π radians). Switch modes depending on what your formula or textbook expects.

What's the difference between log and ln? log is base-10 logarithm; ln is the natural logarithm, base e (≈2.718). Use whichever your formula or coursework specifies.

Can I calculate square roots and other roots? Yes — square root is available directly, and higher-order roots can be calculated using the power function with a fractional exponent (e.g., x^(1/3) for a cube root).

Does it support order of operations (PEMDAS)? Yes — standard mathematical order of operations is applied automatically to multi-step expressions.