Calculator

Everyday calculators for percentages, exact age, and BMI, with transparent formulas and local computation.

What this category helps with

  • Work out discounts, raises, tips, and data proportions with the percentage calculator.
  • Find exact age in years/months/days and days lived from a birth date.
  • Estimate BMI and healthy weight range from height and weight.

Data handling notes

  • Calculations are local and for personal reference only.
  • BMI categories are general guidance; consult a professional for medical advice.

Tools in this category

  • Percentage Calculator

    Work out percentages, proportions, and change — three handy modes in one tool.

  • Age Calculator

    Find your exact age in years, months, and days, plus total days lived and your next birthday countdown.

  • BMI Calculator

    Calculate your Body Mass Index and see which weight category you fall into, with a healthy range.