Scientific Calculator

Need to calculate a sine, logarithm, or exponent? Our free online scientific calculator handles all advanced math functions right in your browser — no app download, no installation required.

What Does This Calculator Do?

This scientific calculator supports all standard and advanced mathematical operations including trigonometric functions, logarithms, exponents, roots, factorials, and more — everything you'd find on a physical scientific calculator.

Key Functions Available

• Basic operations: +, −, ×, ÷, parentheses
• Trigonometry: sin, cos, tan, arcsin, arccos, arctan (degrees & radians)
• Logarithms: log (base 10), ln (natural log), log base n
• Powers & roots: xⁿ, x², √, ⁿ√, eˣ
• Constants: π (pi = 3.14159...), e (Euler's number = 2.71828...)
• Other: factorial (n!), absolute value, percentages, memory functions

How to Use This Calculator

1. Enter your calculation using the on-screen buttons or keyboard.
2. Use parentheses to control order of operations.
3. Toggle between DEG (degrees) and RAD (radians) for trig functions.
4. Press = or Enter to calculate the result.

Example Calculations

• sin(30°) = 0.5
• log(1000) = 3 (because 10³ = 1000)
• e² ≈ 7.389
• 5! = 5 × 4 × 3 × 2 × 1 = 120
• √(144) = 12

Common Mistakes to Avoid

• Forgetting to set degree vs. radian mode — sin(90) = 1 in degrees; sin(90) ≈ 0.894 in radians. Always check your mode before trig calculations.
• Misusing order of operations — 2 + 3 × 4 = 14, not 20. Use parentheses when in doubt: (2 + 3) × 4 = 20.
• Confusing log and ln — log is base 10; ln is base e. They're different functions producing different results.

Frequently Asked Questions

What is a scientific calculator used for?

Scientific calculators are essential for high school and college math, physics, chemistry, and engineering. They handle operations that standard calculators can't: trigonometry, logarithms, statistical functions, and complex number arithmetic.

What is the difference between DEG and RAD?

DEG (degrees) measures angles in 0°–360°. RAD (radians) measures in 0–2π. The conversion: degrees × π/180 = radians. Most everyday geometry uses degrees; calculus and physics often use radians.

What does e mean on a calculator?

The constant e ≈ 2.71828... is Euler's number, the base of natural logarithms. eˣ appears throughout calculus, compound interest, population growth, and many natural phenomena.

What is n! (factorial)?

n! (n factorial) = n × (n−1) × (n−2) × ... × 2 × 1. Used in probability and combinatorics. 0! = 1 by convention. Factorials grow extremely fast — 20! = 2,432,902,008,176,640,000.

Conclusion

Our online scientific calculator puts every function you need in one place — accessible from any device, at any time. Bookmark it for your next math, science, or engineering problem.

Related: Fraction Calculator | Percent Calculator | Log Calculator | Exponent Calculator