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Scientific Calculator

Full scientific calculator with trigonometry, logarithms, exponents, and memory functions. Supports sin, cos, tan, log, ln, and more.

DEG
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Tips:

  • 2nd toggles: sin→sin⁻¹, log→10ˣ, ln→eˣ, x²→∛, MS→MC
  • DEG/RAD switches angle mode for trig functions
  • Ans inserts the last calculated result
  • Keyboard: type numbers, operators, Enter for =, Esc to clear

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Scientific Calculator Functions

A full-featured scientific calculator for math, science, and engineering calculations. It follows standard operator precedence (PEMDAS), so expressions evaluate in the correct mathematical order.

Basic Operations

  • Add (+), Subtract (−), Multiply (×), Divide (÷)
  • Percent (%), Change sign (±)

Trigonometry

  • sin, cos, tan: Enter angle, use DEG/RAD toggle to set mode
  • 2nd reveals inverse: sin⁻¹, cos⁻¹, tan⁻¹
  • sin(30°) = 0.5, cos(60°) = 0.5, tan(45°) = 1

Powers & Roots

  • x²: Square (2nd toggles to ∛ cube root)
  • √: Square root (2nd toggles to cube root)
  • xʸ: Any power — enter base, press xʸ, enter exponent, press =

Logarithms

  • log: Base-10 logarithm (2nd: 10ˣ)
  • ln: Natural logarithm (2nd: eˣ)

Memory

  • MS: Store value (2nd: MC to clear)
  • M+: Add to memory
  • MR: Recall memory
  • Ans: Insert last calculated result

Keyboard Shortcuts

  • Type numbers and operators directly (0-9, +, -, *, /)
  • Enter or = to evaluate
  • Escape to clear, Backspace to delete

Common Scientific Calculations

Converting Between Degrees and Radians

Many formulas in physics and engineering use radians. To convert: radians = degrees × (π ÷ 180). For example, 90° = π/2 ≈ 1.5708 radians. To convert back: degrees = radians × (180 ÷ π).

Logarithm Applications

Logarithms appear throughout science. The Richter scale measures earthquake magnitude using log₁₀, so a magnitude 6 earthquake is 10× stronger than magnitude 5. Decibels use 10 × log₁₀(P₁/P₀) to measure sound intensity. In chemistry, pH = −log₁₀[H⁺] measures acidity.

Trigonometry in Practice

Use sin to find the vertical component of a force or velocity, cos for the horizontal component, and tan to find angles from opposite/adjacent sides. For example, a 10-foot ladder leaning at 75° reaches sin(75°) × 10 = 9.66 feet up the wall.

Scientific vs Standard Calculators

A standard calculator processes operations left to right. A scientific calculator respects order of operations: parentheses first, then exponents, then multiplication/division, then addition/subtraction. Entering 2 + 3 × 4 gives 14 on a scientific calculator (correct) vs 20 on a basic calculator.

Scientific calculators also support functions absent from basic models: trigonometric functions, logarithms, exponents, factorials, and constants like π and e. These are essential for algebra, physics, chemistry, and engineering coursework.

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Frequently Asked Questions

What is the difference between log and ln?

log is the base-10 logarithm and ln is the natural logarithm, base e, about 2.718. So log(100) = 2 because 10² = 100, and ln(e) = 1. Use log for decibels, pH and orders of magnitude, and ln for continuous growth, decay and most calculus. Mixing them up changes the answer by a factor of about 2.3.

What does E mean on a calculator?

E means times 10 to the power of the number that follows, which is scientific notation. A display of 3.7E6 means 3.7 × 10^6, or 3,700,000, and 2.5E-3 means 0.0025. Calculators switch to this format when a result has too many digits to show in full; the EE or EXP key enters numbers the same way.

Should my calculator be in degrees or radians?

Use degrees for triangle and geometry problems given in degrees, and radians for calculus and physics formulas. The mode changes the answer: sin(90) is 1 in degrees but about 0.894 in radians, because 90 radians is a different angle. A wrong mode is the most common reason trigonometry answers disagree with a textbook.

Why does 4 + 3 × 2 equal 10 and not 14?

Multiplication is done before addition, so 4 + 3 × 2 = 4 + 6 = 10. Under the order of operations, parentheses come first, then exponents, then multiplication and division, then addition and subtraction. To add first, write (4 + 3) × 2, which equals 14. Scientific calculators follow this order automatically, while basic ones often do not.