🧮 All-in-One Calculator Suite

Select a calculator below and start calculating instantly — no page reload

Basic Calculator

🔢 Basic Calculator — How to Use

This basic calculator handles all standard arithmetic operations with full keyboard support. You can type numbers and operators directly on your keyboard, press Enter to get the result, Escape to clear, and Backspace to delete the last character.

  • % — Calculates percentage of a number (e.g. 200 % gives 2)
  • ÷ × − + — Division, multiplication, subtraction, addition
  • Results are shown instantly in the display above the buttons
  • Works completely offline once the page is loaded

Scientific Calculator

🔬 Scientific Calculator — How to Use

This scientific calculator supports advanced mathematical functions used in physics, engineering, statistics and higher mathematics. All trigonometric functions use degrees by default.

  • sin, cos, tan — Trigonometric functions (input degrees)
  • log — Base-10 logarithm  |  ln — Natural logarithm (base e)
  • √x — Square root  |  x² — Square  |  x³ — Cube  |  xʸ — Power
  • n! — Factorial  |  π ≈ 3.14159  |  e ≈ 2.71828
  • Parentheses are supported for complex grouped expressions

EMI / Loan Calculator

Enter a valid positive loan amount.
Enter a rate between 0.01% and 100%.
Enter tenure between 1 and 30 years.

💰 How EMI Is Calculated

Formula: EMI = P × r × (1+r)ⁿ ÷ ((1+r)ⁿ − 1)

  • P = Principal loan amount
  • r = Monthly interest rate (Annual rate ÷ 12 ÷ 100)
  • n = Total number of monthly installments (Years × 12)
  • Results are indicative estimates — actual bank EMI may include processing fees
  • Use this tool to compare different loan amounts, tenures and interest rates before approaching a bank

BMI Calculator

Enter height between 50 and 300 cm.
Enter weight between 2 and 600 kg.

💪 Understanding Your BMI

BMI (Body Mass Index) is calculated using the formula: BMI = Weight (kg) ÷ Height² (m²). It is a widely used screening tool, though not a diagnostic measure.

  • Below 18.5 — Underweight: May indicate nutritional deficiency
  • 18.5 – 24.9 — Normal weight: Healthy range per WHO guidelines
  • 25.0 – 29.9 — Overweight: Consider dietary and lifestyle changes
  • 30.0 and above — Obese: Consult a healthcare professional
  • BMI does not account for muscle mass, bone density or body composition

Birthday / Age Calculator

Please enter a valid date of birth.

🎂 What This Calculator Tells You

Enter your date of birth to get a comprehensive breakdown of your age and birthday details. You can also set a custom "calculate as of" date to find someone's age on any past or future date.

  • Exact Age — Years, months and days to the exact day
  • Total Days Lived — Your life in total days, weeks and months
  • Day of Week — The exact weekday you were born on
  • Zodiac Sign — Your Western astrological star sign
  • Next Birthday — Days until your upcoming birthday