What is a Scientific Calculator?
A scientific calculator extends basic arithmetic with mathematical functions needed for science, engineering, statistics and advanced maths. If you are solving trigonometric or log equations, you can open our online scientific calculator which features 30+ functions and supports keyboard input. Unlike a standard calculator, it can compute trigonometric functions, logarithms, roots, powers, factorials and more.
Trigonometric Functions
Trig functions relate the angles of a right triangle to the ratios of its sides. Our calculator works in degrees.
| Function | Key Values | Use Case |
|---|---|---|
| sin(x) | sin(0°)=0, sin(30°)=0.5, sin(90°)=1 | Opposite ÷ Hypotenuse |
| cos(x) | cos(0°)=1, cos(60°)=0.5, cos(90°)=0 | Adjacent ÷ Hypotenuse |
| tan(x) | tan(0°)=0, tan(45°)=1 | Opposite ÷ Adjacent |
| sin⁻¹(x) | Input: 0–1 → Output: degrees | Find angle from ratio |
💡 To convert between degrees and radians: Radians = Degrees × π ÷ 180. Our calculator always uses degrees — no conversion needed.
Logarithms
ln(e) = 1 → e¹ = e (natural logarithm)
log₂(8) = 3 → 2³ = 8 (binary logarithm)
Logarithms answer "what power do I need to raise this base to get this number?" They are used in decibels (sound), pH (chemistry), Richter scale (earthquakes), information theory and compound interest formulas.
Other Key Functions
- √x (Square Root): √144 = 12. Used everywhere from physics to finance.
- x² and x³: Quick squaring and cubing without typing ×.
- n! (Factorial): 5! = 5×4×3×2×1 = 120. Used in probability and combinatorics.
- π = 3.14159… The ratio of a circle's circumference to its diameter.
- e = 2.71828… Euler's number, base of natural logarithm. Used in growth/decay formulas.
- |x| (Absolute Value): |−7| = 7. Always returns non-negative value.
🔬 Try the full scientific calculator with 30+ functions
Open Scientific Calculator →📐 External Scientific References & Authoritative Sources
- Mathematical Association of America (MAA) — Statistical Averages, Ratios & Arithmetic Principles.
- NIST Digital Library of Mathematical Functions — Standard Mathematical Formulations & Algorithms.
- Wolfram MathWorld — Interactive Mathematical Formulas & Statistical Analysis Standards.