How to Use the Scientific Calculator
This free online scientific calculator supports all standard scientific functions including trigonometry, logarithms, exponentials, factorials, powers, roots, and more. It works in both Degree (DEG) and Radian (RAD) mode and includes keyboard support for faster input.
Trigonometry: sin(30°)=0.5 cos(60°)=0.5 tan(45°)=1
Logarithms: log(1000)=3 log(100)=2 ln(e)=1 ln(1)=0
Powers/Roots: 2^10=1024 √144=12 ∛27=3
Factorial: 5!=120 10!=3,628,800
Constants: π=3.14159265... e=2.71828182...
Logarithms: log(1000)=3 log(100)=2 ln(e)=1 ln(1)=0
Powers/Roots: 2^10=1024 √144=12 ∛27=3
Factorial: 5!=120 10!=3,628,800
Constants: π=3.14159265... e=2.71828182...
All Functions Quick Reference
| Button | Function | Example (DEG) | Result |
|---|---|---|---|
| sin | Sine of angle | sin(30°) | 0.5 |
| cos | Cosine of angle | cos(60°) | 0.5 |
| tan | Tangent of angle | tan(45°) | 1 |
| sin⁻¹ | Inverse sine (arcsin) | sin⁻¹(0.5) | 30° |
| log | Logarithm base 10 | log(1000) | 3 |
| ln | Natural log (base e) | ln(e²) | 2 |
| x² | Square the number | 9² | 81 |
| xʸ | Raise x to power y | 2^10 | 1024 |
| √x | Square root | √225 | 15 |
| ∛x | Cube root | ∛512 | 8 |
| n! | Factorial | 7! | 5040 |
| π | Pi constant | π × 5² | 78.54 |
| e | Euler's number | e² | 7.389 |
| 1/x | Reciprocal | 1/8 | 0.125 |
DEG vs RAD Mode Explained
The most common mistake when using a scientific calculator is having the wrong angle mode selected. Always check before entering trigonometric values:
DEG mode: sin(90°) = 1 ✅ Use for everyday math
RAD mode: sin(π/2) = 1 ✅ Use for calculus & physics
Convert: degrees × π/180 = radians
Convert: radians × 180/π = degrees
Example: 90° = 90 × π/180 = π/2 ≈ 1.5708 rad
RAD mode: sin(π/2) = 1 ✅ Use for calculus & physics
Convert: degrees × π/180 = radians
Convert: radians × 180/π = degrees
Example: 90° = 90 × π/180 = π/2 ≈ 1.5708 rad
Keyboard Shortcuts
Use your keyboard for faster calculations:
0–9, .
Numbers and decimal
+ − * /
Arithmetic operators
Enter / =
Calculate result
Backspace
Delete last entry
Escape
Clear all (AC)
( and )
Group operations
Real-World Applications
- Physics problems: Projectile angles, wave frequencies, energy calculations
- Engineering: Structural analysis, circuit calculations, fluid dynamics
- Chemistry: pH calculations (log), reaction rates, concentration formulas
- Finance: Compound interest (eˣ), loan amortization, investment modelling
- Architecture: Roof angles, load calculations, structural geometry
- Computer science: Binary log₂, algorithm complexity (n log n), hash functions