How to Use This Calculator
Standard Calculator
- Select the "Standard" tab at the top
- Click number buttons (0-9) to enter values
- Use +, −, ×, ÷ buttons for arithmetic operations
- Press "=" or hit Enter to calculate the result
- Use "C" to clear all input, or backspace to delete last digit
- Use "%" to calculate percentages
Scientific Calculator
- Select the "Scientific" tab for advanced functions
- Use sin, cos, tan for trigonometric calculations (radians)
- Use ln for natural log, log for base-10 logarithm
- Use x² to square a number, √x for square root
- Use ^ for exponentiation (e.g., 2^3 = 8)
- Use π and e to insert mathematical constants
- Use parentheses ( ) to control operation order
Unit Converter
- Select the "Unit Converter" tab
- For length: enter a value in Meters, Feet, or Inches
- Other fields automatically update with converted values
- For weight: enter a value in Kilograms or Pounds
- Conversion happens instantly as you type
BMI Calculator
- Select the "BMI" tab
- Enter your height in centimeters (cm)
- Enter your weight in kilograms (kg)
- Click "Calculate BMI" to see your result
- Your BMI value and health category will be displayed
- Underweight: BMI below 18.5
- Normal: BMI 18.5 to 24.9
- Overweight: BMI 25 to 29.9
- Obese: BMI 30 or above
Keyboard Shortcuts
0-9 Numbers
+ - * / Operators
Enter Calculate
Escape Clear All
Backspace Delete
. Decimal Point
% Percentage
( ) Parentheses