Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, exponents, factorial, and memory functions. Supports both degree and radian modes. See also our Basic Calculator and Logarithm Calculator.
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How to Use the Scientific Calculator
- Enter a number using the number pad or type directly.
- Click a function button (sin, cos, log, etc.) to apply it to the current number.
- Use operators (+, -, ×, ÷) for arithmetic between two numbers.
- Toggle between DEG and RAD mode for trigonometric functions.
- Use memory buttons (MS, MR, M+, MC) to store and recall values.
Formula
Trigonometric: sin(θ), cos(θ), tan(θ) and inverses
Logarithmic: log₁₀(x), ln(x) = logₑ(x)
Exponential: e^x, 10^x, x², x³
Roots: √x, ∛x
Other: |x|, 1/x, n!, x%
Degree to Radian: rad = deg × π/180
Radian to Degree: deg = rad × 180/πExample
Calculate sin(30°):
1. Ensure DEG mode is selected
2. Enter 30
3. Click sin
Result: 0.5
Calculate ln(e²):
1. Enter 2, click exp (gives e² = 7.389)
2. Click ln
Result: 2
Scientific Constants Reference Table
| Constant | Symbol | Value |
|---|---|---|
| Pi | π | 3.14159265358979 |
| Euler's Number | e | 2.71828182845905 |
| Golden Ratio | φ | 1.61803398874989 |
| Square Root of 2 | √2 | 1.41421356237310 |
| Natural Log of 2 | ln(2) | 0.69314718055995 |
| Log₁₀(2) | log(2) | 0.30102999566399 |
Frequently Asked Questions
What is the difference between DEG and RAD mode?
DEG mode interprets angles in degrees (360° = full circle). RAD mode uses radians (2π = full circle). Most everyday calculations use degrees; calculus and physics often use radians.
How do I calculate powers and roots?
Use x² for squaring, x³ for cubing, sqrt for square root, and cbrt for cube root. For other powers, use the exp function or multiply repeatedly.
What is the factorial function?
Factorial (n!) multiplies all positive integers up to n. For example, 5! = 5×4×3×2×1 = 120. It is used in combinatorics and probability.
What is the difference between log and ln?
log is the common logarithm (base 10). ln is the natural logarithm (base e ≈ 2.718). ln is used more in calculus; log is common in engineering and science.
How does memory work?
MS stores the current display value. MR recalls the stored value. M+ adds the current display to memory. MC clears the memory to zero.