What You Can Do with This Scientific Calculator

This online scientific calculator offers CASIO fx-570 level functionality for free in your web browser. Whether you're preparing for math exams, engineering assignments, or physics & chemistry calculations, use it instantly without installing any app.

Function-by-Function Usage Guide

• How to Use Trigonometric Functions (sin, cos, tan)

  Press the sin button and sin( will appear. Enter the angle, close with ), and press =.
  
  Examples:
  • sin(30) = 0.5 — sine of 30 degrees
  • cos(60) = 0.5 — cosine of 60 degrees
  • tan(45) = 1 — tangent of 45 degrees
  
  Inverse trig: Press 2nd → INV to switch to sin⁻¹, cos⁻¹, tan⁻¹. For example, sin⁻¹(0.5) = 30 gives you the angle from a value.
  
  Hyperbolic functions: Press 2nd twice to enter HYP mode for sinh, cosh, tanh.

• How to Use Log Functions (log, ln)

  The log button computes the common logarithm (base 10), and ln computes the natural logarithm (base e ≈ 2.718).
  
  Examples:
  • log(100) = 2 — because 10² = 100
  • log(1000) = 3 — because 10³ = 1000
  • ln(e) = 1 — natural log of e
  
  Inverse functions: In INV mode, these become 10ˣ and eˣ. 10^(3) = 1000, e^(2) ≈ 7.389.
  
  Applications: pH concentration (log), half-life calculations (ln), decibel conversion (10×log), and more.

• How to Use Powers, Roots & Factorials

  Powers:
  • x² — Enter a number then press x²: 5 x² = 25
  • x³ — Available in INV mode: 3 x³ = 27
  • xʸ — Arbitrary power: 2 xʸ 10 = 1024
  
  Roots:
  • √ — Square root: √(9) = 3
  • ³√ — Cube root in INV mode: ³√(27) = 3
  
  Other functions:
  • n! — Factorial: 5! = 120 (5×4×3×2×1)
  • nPr — Permutation: nPr(5,2) = 20
  • nCr — Combination (INV mode): nCr(5,2) = 10
  • |x| — Absolute value: |−7| = 7
  • 1/x — Reciprocal: 1/4 = 0.25

• How to Use Memory Functions (M+, M-, MR, MC)

  Save and reuse intermediate results in complex calculations.
  
  Step-by-step:
  1. Calculate a value (e.g., 25 + 30 = 55)
  2. Press M+ to add the result to memory
  3. Do another calculation (e.g., 100 × 2 = 200)
  4. Press M+ to add 200 to memory
  5. Press MR to recall the accumulated value (255)
  
  Button reference:
  • M+ — Add current result to memory
  • M− — Subtract current result from memory
  • MR — Recall stored memory value into expression
  • MC — Clear memory
  
  When memory holds a value, an M indicator appears at the top-left of the display.

• How to Use Special Functions (Ans, EXP, Rand, etc.)

  Ans (Previous Result):
  Inserts the previous calculation result into your expression. Great for chained calculations.
  Example: 10 + 5 = 15 → Ans × 2 = 30
  
  EXP (Scientific Notation):
  Enter large numbers easily.
  Example: To enter the speed of light 3×10⁸, type 3 EXP 8
  
  +/− (Sign Toggle):
  Switches positive to negative and vice versa.
  
  Rand (Random Number):
  Generates a random decimal between 0 and 1. Useful for probability calculations and simulations.
  
  % (Percent):
  200 × 15% = 30 — easily calculate percentages.

• Keyboard Shortcuts Guide

  Calculate quickly using just your keyboard — no mouse needed.
  
  Input keys:
  • 0–9 — Number input
  • + - * / — Arithmetic operations
  • ( ) — Parentheses
  • . — Decimal point
  • ^ — Power (xʸ)
  • ! — Factorial
  • % — Percent
  
  Action keys:
  • Enter or = — Execute calculation
  • Backspace — Delete last input
  • Esc — Clear all (AC)
  
  Tip: Click the ⓘ button at the top-left of the display to see the full shortcut list.

Real-World Calculation Examples

How to Use This Scientific Calculator (Step-by-Step)

1. Step 1: Enter an Expression — Click the on-screen buttons or use your keyboard to input numbers and operators. Your expression appears in real-time on the display.
2. Step 2: Use Functions — Press a function button like sin, cos, or log and parentheses open automatically. Enter the value and close with ).
   Example: sin(30) + log(100) = 2.5
3. Step 3: Live Preview — As you type, the expected result is shown below the expression in real-time. Check the result before pressing =.
4. Step 4: Get Result & Copy — Press = (or Enter key) to display the final result. Click the copy icon next to the result to copy it to your clipboard.
5. Step 5: Chained Calculations — After getting a result, press an operator (+, -, ×, ÷) to continue calculating from the previous result. Or use the Ans button to recall it.
6. Step 6: Switch Modes — Press the 2nd button to cycle through INV (inverse), HYP (hyperbolic), and H⁻¹ (inverse hyperbolic) modes. Use the DEG/RAD toggle to change angle units.