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Scientific Calculator

Math

A precision online scientific calculator with trigonometric, logarithmic, exponential, and algebraic functions. Supports keyboard typing, calculation history tape, and DEG/RAD angle modes.

Quick Examples:
M
 
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Calculation History
No calculations yet. Enter an expression to begin.

Keyboard Shortcuts

0-9, . : Digits
+, -, *, / : Basic Ops
Enter / = : Equals
Backspace : Delete
Escape : Clear (C)
(, ) : Parentheses

How This Calculator Works

How modern scientific calculators evaluate complex mathematical expressions, trigonometry, logarithms, and powers

📐 Order of Operations & Function Evaluation
f(x) = a \cdot \sin(\omega t + \phi) + e^{k x} - \log_{10}(y)
DEG (Degrees): Angle measurement where a full circle is 360°. Standard in geometry, navigation, surveying, and elementary physics.
RAD (Radians): Angle measurement where a full circle is 2π radians (~6.28318 rad). Fundamental in calculus, differential equations, and harmonic motion.
e (Euler's Number ≈ 2.71828): Base of the natural logarithm ln(x). Governs continuous compound growth, radioactive decay, and normal distributions.
π (Pi ≈ 3.14159): Ratio of a circle's circumference to its diameter. Appears in periodic waves, trigonometry, and spherical geometry.
Memory Registers (MC, MR, M+, M-, MS): Dedicated storage slots allowing intermediate values to be stored, recalled, or accumulated across multi-step calculations.

Key Mathematical Rules & Properties

Strict PEMDAS Operator Hierarchy

Calculations are evaluated in the order: 1) Parentheses ( ), 2) Exponents & Roots (xʸ, √), 3) Multiplication & Division (×, ÷), 4) Addition & Subtraction (+, −).

Trigonometric Angle Modes (DEG vs RAD)

Always verify your angle mode before calculating trigonometric values. For example, sin(30) in DEG is exactly 0.5, but in RAD it equals -0.98803.

Natural Log (ln) vs Common Log (log₁₀)

ln(x) calculates the power of e required to equal x (base e). log(x) calculates the power of 10 required to equal x (base 10). log₂(x) calculates base 2.

Scientific Notation (EXP / EE)

Use EXP to enter large or minute numbers quickly. For instance, typing 3 EXP 8 produces 3e+8, representing 3 × 10⁸ (the speed of light in m/s).

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Worked Example

Evaluate: 2 × sin(30°) + √(16) − ln(e²)

  1. Evaluate trigonometric function: In DEG mode, sin(30°) = 0.5
  2. Multiply: 2 × 0.5 = 1.0
  3. Evaluate square root: √(16) = 4
  4. Evaluate natural logarithm of exponential: ln(e²) = 2
  5. Combine terms: 1.0 + 4 − 2 = 3.0
Final Answer: 3.0

Frequently Asked Questions

What is the difference between DEG and RAD angle modes?

Degree mode measures angles from 0° to 360°, commonly used in navigation and everyday geometry. Radian mode measures angles based on circle radius arc lengths (where 360° = 2π radians). Calculus and higher mathematics require Radians for correct derivative and integral formulas.

How do the Memory buttons (MC, MR, M+, M-, MS) work?

MS (Memory Store) saves the current display number into memory. MR (Memory Recall) brings the stored number onto the screen. M+ adds the current number to memory, while M- subtracts it. MC (Memory Clear) resets the stored value to zero.

What does "EXP" or "EE" mean?

EXP stands for exponential power of ten (equivalent to "× 10^"). For example, typing "6.02 EXP 23" enters 6.02 × 10²³ (Avogadro's number).

Can I use keyboard shortcuts on this calculator?

Yes! You can type numbers directly from your physical or numeric keyboard, use +, -, *, / for operators, Enter or = to evaluate, Backspace to delete a digit, and Escape to clear all.

Understanding your calculation

Method, example and limitations

How the calculation works

Scientific operations combine arithmetic with functions such as powers, roots, logarithms and trigonometry. The angle setting controls trigonometric interpretation.

Example to check

In degree mode, sin(30) = 0.5. In radian mode, sin(π/6) = 0.5.

Before using the result

Degrees and radians are not interchangeable. Check function domains, parentheses, operator precedence and whether the display represents an approximation.

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