Scientific Calculator Online Free Tool
Scientific Calculator
Calculator
Quick Function Reference
Trigonometric
sin, cos, tan: Basic trig functions
sin⁻¹, cos⁻¹, tan⁻¹: Inverse trig
sinh, cosh, tanh: Hyperbolic
Logarithmic
ln: Natural logarithm (base e)
log: Common logarithm (base 10)
log₂: Binary logarithm (base 2)
Exponential
xʸ: Power function
x², x³: Square and cube
eˣ, 10ˣ: Exponential
Special
√x, ∛x: Square and cube roots
n!: Factorial
|x|: Absolute value
1/x: Reciprocal
Angle Mode: DEG
Toggle between Degrees (DEG) and Radians (RAD) for trigonometric functions. Current mode affects sin, cos, tan, and their inverse functions.
Memory Functions
Mathematical Constants
The scientific calculator handles advanced mathematical operations beyond basic arithmetic: exponents, roots, logarithms, trigonometric functions, and more. It follows the standard order of operations (PEMDAS/BODMAS).
Order of Operations (PEMDAS)
All calculators evaluate expressions in this order: Parentheses first, then Exponents, then Multiplication and Division (left to right), then Addition and Subtraction (left to right). This is called PEMDAS in the US and BODMAS in the UK. Without this rule, the same expression gives different results.
Example: 3 + 4 x 2 = 3 + 8 = 11 (not 14) 2 + (8 / 4) x 3² = 2 + 2 x 9 = 2 + 18 = 20
Always use parentheses when you want a specific calculation order different from PEMDAS.
Common Scientific Functions
| Function | Symbol | Example | Result |
|---|---|---|---|
| Square root | √ | √144 | 12 |
| Exponent / Power | x^y or x² | 2^10 | 1,024 |
| Natural log | ln | ln(e) | 1 |
| Log base 10 | log | log(1000) | 3 |
| Sine | sin | sin(30°) | 0.5 |
| Cosine | cos | cos(60°) | 0.5 |
| Tangent | tan | tan(45°) | 1 |
| Pi | π | π x r² | Area of circle |
| Factorial | n! | 5! | 120 |
Degrees vs. Radians
Trigonometric functions work in either degrees or radians. A full circle is 360 degrees or 2π radians. Make sure your calculator is in the correct mode. In most physics and calculus, radians are standard. In everyday geometry, degrees are more common. 180 degrees = π radians.
Degrees to Radians: multiply by π/180 Radians to Degrees: multiply by 180/π
Example: 90° = 90 x (π/180) = π/2 radians = 1.5708 radians.
Scientific Notation
Scientific notation writes very large or small numbers as a coefficient times a power of 10. The speed of light is 3 x 10⁸ m/s. The mass of a proton is 1.67 x 10⁻²⁷ kg. On a calculator, "E" notation means the same thing: 3E8 = 3 x 10⁸.
Standard form: a x 10^n where 1 ≤ |a| < 10
Example: 0.000045 = 4.5 x 10⁻⁵. 678,000 = 6.78 x 10⁵.
Frequently Asked Questions
What is the order of operations in math?⌄
PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. Work left to right at equal precedence levels. Example: 8 + 2 x 3 = 8 + 6 = 14, not 30, because multiplication comes before addition.
How do I calculate a square root?⌄
On this calculator, press the √ button then enter the number. Or raise the number to the power of 0.5: 64^0.5 = 8. The square root of 144 is 12 because 12 x 12 = 144.
What is e in math?⌄
e is Euler's number, approximately 2.71828. It is the base of natural logarithms and appears throughout calculus, compound interest, probability, and physics. The natural log (ln) is the inverse of e^x.
How do I calculate sin, cos, or tan?⌄
Enter the angle value, then press sin, cos, or tan. Make sure the calculator is in degree mode (not radian mode) for most geometry problems. sin(30) = 0.5. cos(60) = 0.5. tan(45) = 1.
What does log mean on a calculator?⌄
The "log" button is log base 10 (common logarithm). log(100) = 2 because 10² = 100. The "ln" button is the natural log (base e). log(1,000) = 3. These are not the same function.