Calculators
Math, finance and health calculators.
Calculators do the math for you and show the result the moment you type. Work out percentages, discounts and tips, run everyday finance numbers, or compute health figures like BMI and ideal targets. They are made for shoppers checking a sale price, students and professionals crunching numbers, and anyone who would rather get an instant, accurate answer than reach for a phone calculator. Each tool explains the formula behind the result, so you can trust how the number was reached. Everything is computed locally in your browser — nothing you enter is sent anywhere — and there is no account to create. Free, instant, and designed to give you the answer at a glance.
6 tools
All tools → Age Calculator Enter a birth date and instantly get the exact age in years, months and days — plus total days, weeks and hours, and a live countdown to the next birthday. BMI Calculator Enter your height and weight to instantly get your BMI plus the standard WHO weight category, in metric or imperial units. Discount Calculator Enter an original price and a discount percentage to instantly see the final sale price and exactly how much money you save. Loan Calculator Enter loan amount, interest rate, and term to instantly see your monthly payment, total interest, total repaid, and a full month-by-month amortization schedule. Percentage Calculator Solve any percentage question in one place — what is X% of Y, what percent X is of Y, and the percent change from one number to another — with results that update live as you type. Tip Calculator Enter a bill and tip percentage to instantly see the tip amount, the grand total, and exactly how much each person owes when splitting the check.