📊Percentage CalculatorCalculate percentages instantly: X% of Y, what percent one number is of another, and percentage increase or decrease.⚖️BMI CalculatorCalculate your Body Mass Index instantly from height and weight.🎂Age CalculatorCalculate your exact chronological age from your date of birth — years, months, days and total days alive.🏷️Discount CalculatorCalculate sale prices instantly: enter the original price and discount percent to see what you save and what you pay.🏦Loan CalculatorEstimate monthly loan payments, total interest and total cost from amount, rate and term.🧾Tip CalculatorCalculate restaurant tips and split the bill evenly between friends.
Why use our calculators?
Every calculator on this page runs entirely in your browser with live results as you type. There is no account to create, no file to upload and no waiting — open the page and calculate.
From shopping discounts and restaurant bills to loan planning and health checks, these six tools cover the maths questions people search for every day.
Frequently Asked Questions
Are these calculators really free?
Yes. All six calculators are completely free with no usage limits, no accounts and no watermarks.
Do my numbers get uploaded anywhere?
No. Every calculation happens locally in your browser using JavaScript. Your inputs never leave your device.
Do the calculators work on mobile?
Yes. Every calculator is fully responsive and works on Android, iPhone, tablets and desktop browsers.