Scientific Calculator
Advanced math calculator supporting trigonometry, logs, exponentials, and roots.
This scientific calculator, or advanced calculator, handles standard algebraic operations alongside trigonometric and inverse trigonometric functions, logarithms, exponents, roots, and factorials, in both Degree and Radian modes. It's built for quick multi-step calculations that a basic calculator can't handle - trig identities, logarithmic equations, or scientific notation - without needing dedicated software, all from a free scientific calculator online.
Switch between DEG and RAD mode depending on whether your calculation uses degrees or radians, since trigonometric results differ significantly between the two.
What Can This Scientific Calculator Do?
Scientific Calculator Function Guide
| Function | Purpose | Example | Result |
|---|---|---|---|
| sin | Sine of an angle | sin(30°) | 0.5 |
| cos | Cosine of an angle | cos(60°) | 0.5 |
| tan | Tangent of an angle | tan(45°) | 1 |
| √ | Square root | √144 | 12 |
| xʸ | Power (exponent) | 2⁸ | 256 |
| log | Base-10 logarithm | log(1000) | 3 |
| ln | Natural logarithm | ln(e) | 1 |
| n! | Factorial | 5! | 120 |
| π | Pi constant | π × 2 | ≈6.283 |
Worked Scientific Calculator Examples
Degrees vs Radians
Use when your angle is expressed in degrees.
sin(30°) = 0.5
Use when an angle is expressed in radians.
sin(π/6) = 0.5
If a trigonometric result looks wrong, check whether the calculator is set to DEG or RAD.
log vs ln
| log | ln | |
|---|---|---|
| Base | 10 | e |
| Example | log(1000) = 3 | ln(e) = 1 |
| Common use | Base-10 calculations | Exponential/calculus calculations |
Scientific Notation
5.7e6 means 5.7 × 10⁶, or 5,700,000.
3.2e-5 means 0.000032 - the negative exponent shifts the decimal point left instead of right.
You'll run into this notation constantly in science, astronomy, chemistry, physics, and engineering - anywhere a number is either extremely small (an atom's mass) or extremely large (the distance to a star).
Common Scientific Calculator Errors
Check whether the calculator is set to DEG or RAD - the same input gives a very different result in each mode.
√(-9) doesn't have a real-number result, since no real number multiplied by itself gives a negative value.
log(0) and logarithms of negative numbers are undefined in the real-number system - the input to log or ln must be greater than zero.
Double-check your parentheses and operation order - a missing or misplaced parenthesis silently changes which part of the expression is calculated first.
The calculator may display the number using scientific notation (e.g. 6.022e23) once it gets too large to show in full.
You cannot divide by zero - this always produces an error rather than a numeric result.
When Should You Use a Scientific Calculator?
Algebra, trigonometry, logarithms, and advanced arithmetic for homework and exams.
Physics, chemistry, astronomy, and any calculation that involves scientific notation.
Powers, trig functions, logarithms, and other everyday numerical calculations.
Roots, powers, percentages, and multi-step expressions beyond a basic calculator.
Scientific Functions Reference
Trigonometric Functions+
sin, cos, tan - calculate the sine, cosine, and tangent of an angle in the current DEG/RAD mode.
Inverse Trigonometric Functions+
sin⁻¹ (asin), cos⁻¹ (acos), tan⁻¹ (atan) - work backward from a ratio to find the angle that produced it.
Powers & Roots+
x², xʸ (^), √x - raise a number to a power, or find its square root.
Logarithms+
log (base 10), ln (base e) - find the exponent needed to reach a given value.
Constants+
π (≈ 3.14159), e (≈ 2.71828) - built-in mathematical constants you can use directly in an expression.
Other Functions+
n! (factorial), % (percent), and parentheses for grouping parts of an expression.
How to Use the Scientific Calculator
- Enter numbers or a full expression directly into the display, or build one with the keypad.
- Choose DEG or RAD before using any trigonometric function - the result depends on which one is active.
- Select the scientific function you need: trig, inverse trig, logs, roots, powers, or factorial.
- Use parentheses to group parts of a longer expression so operations happen in the right order.
- The result updates instantly - no separate equals step is required, though the = key is there for the familiar feel.
Frequently Asked Questions
What is a scientific calculator?
A scientific calculator extends a basic calculator with trigonometric functions, logarithms, exponents, roots, factorials, and constants like π and e, plus a DEG/RAD mode for angle-based calculations - the tools needed for algebra, trigonometry, and science coursework that a four-function calculator can't handle.
How do I use a scientific calculator online?
Type or tap in an expression using the keypad, choose DEG or RAD if your calculation involves an angle, and the result updates instantly - no installation or sign-up required.
What is DEG mode?
DEG (degree) mode tells the calculator to interpret angle inputs to trig functions as degrees, the everyday unit where a full circle is 360°. Most everyday and classroom trigonometry uses degrees.
What is RAD mode?
RAD (radian) mode tells the calculator to interpret angle inputs as radians, where a full circle is 2π (≈ 6.283) radians. Calculus and higher mathematics typically use radians.
What is the difference between log and ln?
log (without a subscript) means logarithm base 10 - log(1000) = 3 because 10³ = 1000. ln means natural logarithm, base e (≈ 2.71828) - ln(e) = 1 because e¹ = e. They give different answers for the same input.
How do I calculate powers?
Use the xʸ key (or type ^) between the base and the exponent - for example, 2^10 calculates 2 raised to the 10th power.
How do I calculate square roots?
Use the √ key followed by the number, or type sqrt(144) - the calculator returns the positive square root. A negative number under the square root has no real-number result.
How do I enter scientific notation?
Type the coefficient, then e, then the exponent - for example 6.022e23 means 6.022 × 10²³, and 3.2e-5 means 3.2 × 10⁻⁵.
Why is my trigonometric answer different?
The most common cause is being in the wrong angle mode - sin(30) in DEG mode is 0.5, but sin(30) in RAD mode is about -0.988, since 30 radians is a much larger angle than 30 degrees.
Does this calculator follow PEMDAS/BODMAS?
Yes - parentheses first, then exponents and roots, then multiplication and division, then addition and subtraction, exactly like standard order of operations taught in school.
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Last updated: September 29, 2026.