Lock an aspect ratio, change one dimension and get the other, and simplify any width by height to its ratio. Runs in your browser.
Lock a ratio, change one side, and the other follows — or type a size to see its simplified ratio.
Processes your input on your device without uploading it. Libraries or models may need downloading. No site account is required.
Work out percentages: X% of Y, X is what percent of Y, and percentage increase/decrease. Runs in your browser.
Work out the tip and split a bill across any number of people. Updates as you type, runs in your browser.
Estimate the monthly payment, total interest, and total cost of a loan or mortgage. Runs in your browser.
See how an initial amount plus regular deposits grows with compound interest over time. Runs in your browser.
Calculate your Body Mass Index in metric or imperial units, with the WHO category. Runs in your browser.
Estimate your BMR and daily calorie needs with the Mifflin-St Jeor equation, metric or imperial. Runs in your browser.
Find the duration between two dates, or your exact age from a birth date. Runs in your browser.
Work out an exact age in years, months and days, the days lived so far and the countdown to the next birthday. Runs in your browser.