# Calculator

- Age Difference - The Age Difference Calculator calculates the difference in years between two birth years. It returns the absolute age difference.
- Body Mass Index (BMI) - Calculate your BMI (Body Mass Index) using your weight in kilograms and height in meters to classify if you are underweight, normal, overweight, or obese.
- Car Wash Profit Calculator - Calculate profit from car washing by inputting the base price per car, cost per car, and total number of cars. Ensure base price and cost are positive, and number of cars isn't negative.
- Days to Minutes - This calculator efficiently converts the given number of days into minutes and provides the corresponding result.
- Energy Efficiency - This calculator helps find the energy efficiency of a system based on the output and input energy.
- Molecular Mass Calculator - This tool calculates the molecular mass of a chemical compound from its formula, utilizing atomic masses for each element in the compound.
- Weight Loss Percentage Calculator - Calculate the percentage of weight loss by comparing your current weight to your initial weight. This tool helps track weight loss progress by providing a clear percentage of weight lost.