What is the difference between DEG and RAD mode?

DEG mode calculates trigonometric functions using degrees (0-360°), while RAD mode uses radians (0-2π). For example: - sin(90°) = 1 in DEG mode - sin(90) ≈ 0.894 in RAD mode (because 90 radians ≠ 90 degrees) Use DEG for everyday calculations and RAD for advanced mathematics and calculus.

How do I calculate powers other than x² or x³?

To calculate powers like 2⁵: Method 1: Multiply repeatedly 2×2×2×2×2 = 32 Method 2: Use exp and ln functions exp(5*ln(2)) calculates 2⁵ Formula: a^b = exp(b × ln(a)) Example for 3⁴: 1. Calculate ln(3) = 1.0986 2. Multiply by 4 = 4.3944 3. Calculate exp(4.3944) = 81

What does the ln vs log button do?

ln calculates the natural logarithm (base e), while log calculates the common logarithm (base 10). Examples: - ln(e) = 1 - ln(2.71828) ≈ 1 - log(10) = 1 - log(100) = 2 - log(1000) = 3 Natural logarithms (ln) are used in calculus and science. Common logarithms (log) are used in engineering, pH calculations, and decibels.

How do I use memory functions?

Memory functions allow you to store intermediate results: 1. Calculate a value and press MS to store it 2. Continue with other calculations 3. Press MR to recall the stored value 4. Use M+ to add current value to memory 5. Use M- to subtract current value from memory 6. Press MC when done to clear memory Example: Calculate (25 + 30) × (40 - 15) 1. Type 25 + 30 = (result: 55) 2. Press MS to store 55 3. Type 40 - 15 = (result: 25) 4. Press × then MR (recalls 55) 5. Press = (result: 1375) A small 'M' indicator shows when memory contains a value.

Can I use keyboard shortcuts?

Yes! The calculator supports full keyboard input: - Numbers: 0-9 - Operators: + (add), - (subtract), * (multiply), / (divide) - Decimal: . (period) - Calculate: Enter or = - Delete: Backspace (removes last digit) - Clear all: Escape Keyboard shortcuts make calculations much faster than clicking buttons.

Why does my calculation show Error?

Error appears when: 1. Division by zero: 5÷0, 1/0 2. Invalid operations on negative numbers: √(-4), ln(-1) 3. Result is infinity or undefined 4. Factorial of negative or non-integer: (-5)!, (3.5)! 5. Invalid trigonometric operations: asin(2) [sine inverse requires -1 to 1] Press C to clear the error and start a new calculation.

How do I calculate percentages?

Use the % operator: Method 1: Convert to decimal - Type 50% - Press = to get 0.5 Method 2: Find percentage of a number - To find 20% of 150 - Type 150×20% - Press = to get 30 Method 3: Percentage increase/decrease - Original: 100, Increase: 25% - Type 100×(1+25%) = 125 - Type 100×(1-25%) = 75

What is the factorial (x!) function?

Factorial calculates the product of all positive integers up to that number. Formula: n! = n × (n-1) × (n-2) × ... × 2 × 1 Examples: - 5! = 5×4×3×2×1 = 120 - 3! = 3×2×1 = 6 - 0! = 1 (by definition) - 1! = 1 Use cases: - Probability calculations - Combinatorics (arrangements and combinations) - Statistics Note: Only works with non-negative integers. Factorials grow very quickly: 10! = 3,628,800

How accurate are the calculations?

The calculator uses JavaScript floating-point arithmetic (IEEE 754 standard) with results rounded to 10 decimal places for display. Accuracy: - Suitable for most scientific and engineering calculations - Precision: ~15-17 significant digits internally - Display: Rounded to 10 decimal places Limitations: - Very large numbers (>10^308) show as Infinity - Very small numbers (<10^-308) show as 0 - Repeated operations may accumulate tiny rounding errors For calculations requiring extreme precision (cryptography, financial regulations), use specialized mathematical software.

Can I view my previous calculations?

Yes! Click the History icon (clock) in the top right to view up to 20 recent calculations. Features: - Each entry shows the expression and result - Click any history item to recall that result to the display - History persists during your session - History is cleared when you refresh the page or close the browser This is useful for: - Verifying previous calculations - Reusing previous results - Comparing multiple calculations - Keeping track of multi-step problems

Free Scientific Calculator Online - Trig, Log, Exp Functions

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How to Use Scientific Calculator

How to Use the Scientific Calculator:

Choose Your Angle Mode Select DEG (degrees) or RAD (radians) mode in the top right based on your calculation needs. Default is DEG mode.
Enter Numbers and Operations Click number buttons (0-9) or use your keyboard to enter numbers. Use basic operators (+, -, ×, ÷) or scientific functions (sin, cos, tan, log, ln, exp, √, x²).
Use Scientific Functions Enter a number first, then click a scientific function:
- Trigonometry: sin, cos, tan
- Logarithms: log (base 10), ln (natural log)
- Powers: √ (square root), x² (square), x³ (cube)
- Other: 1/x (reciprocal), x! (factorial), abs (absolute value)
Use Memory Functions
- MS (Memory Store): Save current value
- MR (Memory Recall): Retrieve saved value
- M+ (Memory Add): Add to memory
- M- (Memory Subtract): Subtract from memory
- MC (Memory Clear): Clear memory A small "M" indicator shows when memory is active.
Use Constants Click π (pi ≈ 3.14159) or e (Euler's number ≈ 2.71828) to insert mathematical constants into your calculation.
Calculate Result Press = button or Enter key to evaluate your expression. The result appears on the display with full calculation history available.
View History Click the History icon to see your previous calculations. Click any history item to recall that result.
Clear or Backspace Press C to clear everything and start fresh. Press the backspace button or Backspace key to delete the last digit. Press Escape key for quick clear.

Tips:

Use keyboard shortcuts: numbers, +, -, *, /, Enter (=), Backspace, Escape (clear), and . (decimal)
For trigonometric functions, ensure you're in the correct angle mode (DEG or RAD)
The calculator supports order of operations (parentheses, exponents, multiplication/division, addition/subtraction)
Memory functions are useful for complex multi-step calculations
Click any calculation in history to recall that result instantly
Results are automatically rounded to 10 decimal places for precision

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Frequently Asked Questions

What is the difference between DEG and RAD mode?

How do I calculate powers other than x² or x³?

What does the ln vs log button do?

How do I use memory functions?

Can I use keyboard shortcuts?

Why does my calculation show Error?

How do I calculate percentages?

What is the factorial (x!) function?

How accurate are the calculations?

Can I view my previous calculations?

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