Online Scientific Calculator with Advanced Functions (Trig, Log, Exp)

Solving complex mathematical or scientific problems requires a tool that goes beyond basic arithmetic. Our powerful online scientific calculator provides a full suite of functions—including trigonometric, logarithmic, exponential, and more—in a simple, user-friendly interface, ready to handle your most demanding calculations.

How to Use Our Scientific Calculator

Our calculator is designed to be intuitive, whether you’re a student, teacher, or professional. The functions are grouped logically to help you find what you need quickly. Here’s a breakdown of the key buttons and their uses.

Display Screen: The top part of the calculator where your inputs and results are shown.
Mode Toggles (Deg/Rad): A critical switch located near the top. Use Deg if you are working with angles in Degrees (e.g., 30°, 45°, 90°). Use Rad if you are working with angles in Radians (e.g., $p i /2$ , $3 p i /4$ ).

Key Function Groups

Basic Operations: Standard buttons for addition ( $+$ ), subtraction ( $-$ ), multiplication ( $t im es$ ), and division ( $d i v$ ).
Number & Constant Buttons:
- 0-9: The number pad for entering digits.
- . : The decimal point.
- $p i$ (Pi): Inserts the value of Pi ( $a pp ro x 3.14159$ ).
- e (Euler’s Number): Inserts the value of Euler’s number ( $a pp ro x 2.71828$ ).
Parentheses:
- ( ): Use parentheses to control the order of operations for complex calculations. For example, (2+3) * 4 equals 20, while 2 + 3 * 4 equals 14.
Second Function Key:
- 2nd: This key acts like a “Shift” key. Pressing it gives you access to the secondary functions written above the main buttons (e.g., pressing 2nd then sin gives you sin⁻¹, the inverse sine).
Memory Functions:
- MC (Memory Clear): Clears any number stored in memory.
- MR (Memory Recall): Displays the number currently stored in memory.
- M+ (Memory Add): Adds the current number on the display to the number in memory.
- M- (Memory Subtract): Subtracts the current number on the display from the number in memory.

Understanding the Key Functions

A scientific calculator’s power lies in its advanced functions. Understanding what these keys do is essential for solving complex problems in trigonometry, algebra, calculus, and science.

Function Key(s)	Function Name	What It Does & How to Use It
`sin`, `cos`, `tan`	Trigonometric Functions	These find the sine, cosine, or tangent of an angle. Example: To find the cosine of 45 degrees, ensure you’re in Deg mode, then enter `45` and press `cos`. Result: `0.7071`
`2nd` + `sin`, `cos`, `tan`	Inverse Trig (`sin⁻¹`, `cos⁻¹`, `tan⁻¹`)	Also known as arcsin, arccos, and arctan. These find the angle when you know its sine, cosine, or tangent. Example: To find the angle whose sine is 0.5, press `0.5`, then `2nd`, then `sin`. Result: `30` (in Deg mode).
`log`	Base-10 Logarithm	Finds the power to which 10 must be raised to get a certain number. Example: To find `log(100)`, enter `100` and press `log`. Result: `2` (since $1 0^{2} = 100$ ).
`ln`	Natural Logarithm	Finds the power to which e must be raised to get a certain number. Example: To find `ln(e)`, press `e`, then `ln`. Result: `1`.
`√` or `sqrt`	Square Root	Finds the number that, when multiplied by itself, equals the input number. Example: To find the square root of 81, enter `81` and press `√`. Result: `9`.
`x²`, `x³`	Square and Cube	Multiplies a number by itself two or three times. Example: To calculate $5^{3}$ , enter `5`, then `x³`. Result: `125`.
`yˣ` or `xʸ`	Exponent (Power)	Raises a base number (y) to the power of an exponent (x). Example: To calculate $3^{4}$ , enter `3`, press `yˣ`, enter `4`, then press `=`. Result: `81`.
`eˣ`	e to the Power of x	Raises Euler’s number (e) to the power of the input number. Example: To calculate $e^{2}$ , enter `2`, then press `eˣ`. Result: `7.389`.
`10ˣ`	10 to the Power of x	Raises 10 to the power of the input number. Example: To calculate $1 0^{3}$ , enter `3`, then press `10ˣ`. Result: `1000`.
`!`	Factorial	Calculates the product of an integer and all the integers below it down to 1. Example: To find 5! (5 factorial), enter `5` and press `!`. Result: `120` (since $5 t im es 4 t im es 3 t im es 2 t im es 1 = 120$ ).
`1/x`	Reciprocal	Finds the result of dividing 1 by the input number. Example: To find the reciprocal of 4, enter `4` and press `1/x`. Result: `0.25`.

Frequently Asked Questions

How do I switch between Degrees and Radians?

This is one of the most common sources of error. Look for a button or toggle switch near the display labeled “Deg” and “Rad”.

Deg (Degrees): Use this mode when your angle measurements are in degrees (a full circle is 360°). This is common in high school geometry and basic trigonometry problems.
Rad (Radians): Use this mode when your angle measurements are in radians (a full circle is $2 p i$ radians). This is standard in higher-level math like calculus, physics, and engineering. Clicking the toggle will switch between the modes.

What is the difference between the ‘log’ and ‘ln’ buttons?

Both are logarithms, but they use a different base.

log is the common logarithm, which has a base of 10. It answers the question, “10 to what power gives me this number?”
ln is the natural logarithm, which has a base of e (Euler’s number, $a pp ro x 2.718$ ). It answers the question, “e to what power gives me this number?” The natural log (ln) is used extensively in finance, science, and engineering to model exponential growth and decay.

How do I calculate a percentage?

There are two easy ways to use the percent key (%).

Find a percentage of a number: To find 20% of 150, you would type 150 \times 20 %. The calculator will automatically convert 20% to 0.20 and give you the result: 30.
Add or subtract a percentage: To add a 15% tip to a $50 bill, you would type 50 + 15 %. The calculator computes 15% of 50 (which is 7.5) and adds it to 50. Result: 57.5.

How do the memory functions (M+, M-, MR, MC) work?

The memory functions are like a notepad inside your calculator. They let you store a number to use later.

Concrete Example: Imagine you need to calculate (15 \times 4) + (80 \div 5).
1. First, calculate 15 \times 4 = 60. Press M+. The number 60 is now stored in memory.
2. Next, calculate 80 \div 5 = 16.
3. Now, to add this to the stored number, press +, then MR (Memory Recall), then =. The screen will show 16 + 60 = 76.
4. Finally, press MC (Memory Clear) to erase the memory for your next calculation.

What is ‘e’ and why is it an important number?

e, known as Euler’s number, is a fundamental mathematical constant approximately equal to 2.71828. It is the base of the natural logarithm. It appears naturally in many areas of mathematics and science, especially when dealing with compound interest, population growth, radioactive decay, and probability. It is considered one of the most important numbers in mathematics, alongside 0, 1, and $p i$ .

How do I calculate a root other than a square root (like a cube root)?

You can use the exponent key (yˣ). A root can be expressed as a fractional exponent.

The cube root of a number is the same as raising that number to the power of 1/3.
The fourth root is the same as raising to the power of 1/4.
Example: To find the cube root of 125:
1. Enter 125.
2. Press the yˣ key.
3. Enter the fractional exponent. You can type (1 \div 3). Make sure to use parentheses.
4. Press =. The result is 5.

What does the ‘!’ (Factorial) button do?

The factorial function, symbolized by an exclamation mark, calculates the product of a non-negative integer with all the positive integers smaller than it. For example, $5$ (“five factorial”) is calculated as: $5 = 5 t im es 4 t im es 3 t im es 2 t im es 1 = 120$ Factorials are used extensively in probability and combinatorics to determine the number of possible arrangements or combinations of a set of items.

What is scientific notation (e.g., 3.45e+8)?

Scientific notation is a way to express very large or very small numbers concisely. When the calculator displays something like 3.45e+8, it means $3.45 t im es 1 0^{8}$ . You move the decimal point 8 places to the right, giving you 345,000,000. If it showed 3.45e-8, you would move the decimal 8 places to the left, giving you 0.0000000345.

How do I use the reciprocal button (1/x)?

The reciprocal button instantly calculates 1 \div x. This is useful in many physics and engineering formulas. For example, when calculating total resistance in a parallel circuit, you often sum the reciprocals of the individual resistors. Instead of typing 1 \div 50 over and over, you can just type 50 and press 1/x.

Why am I getting the wrong answer for my trigonometry problem?

The number one reason is being in the wrong mode (Degrees vs. Radians). If your problem involves a 30° angle but your calculator is in Radian mode, your answer will be incorrect. Always check your mode before starting any trigonometry calculation. The second most common reason is an error in the order of operations—use parentheses ( ) to ensure the calculator performs calculations in the sequence you intend.

Now that you’ve mastered complex calculations, you might need to convert between different units of measurement for your science problems. Check out our comprehensive Unit Converter to easily switch between metric and imperial units for length, mass, temperature, and more.

Creator

Ismael Vargas

An experienced software developer specializing in React, JavaScript, Django and Python, with more than six years’ expertise building full‑stack applications, data visualizations and cloud‑hosted solutions. He has a strong background in API integration, testing, and AWS services, delivering polished web products.

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