OUR PURPOSE
About us.
Good tools make everyday decisions a little easier.
Convert anything. Calculate anything.
Convert & Calculate Everything brings practical converters and calculators together in one fast, straightforward place. Use it for everyday questions such as converting measurements or currencies, working out percentages and discounts, or calculating dates and fuel costs. Clear inputs and immediately visible results make it easy to check a figure and move on.
Built to be transparent
Each tool explains the formula or method behind its result. Unit conversions use standard measurement definitions. Live currency conversions use rates retrieved from Coinbase; the tool shows when the rate data was fetched, and shows no rate at all if a fresh one cannot be retrieved. The amount tables on currency pair pages use the dated European Central Bank reference rate. Rates are indicative and can differ from those offered by a bank or payment provider. Financial calculation results are estimates for general information, not professional financial advice.
No account required
Basic tools are available without signing in. If you choose to favorite a tool or save a recent calculation, that information stays in this browser.
What you can do here
The site has 77 free tools in eight groups: currency (a live converter plus popular pairs such as euro to dollar), unit conversion (length, weight, temperature, area, volume, speed, data, time, energy, power, pressure, force, angle and fuel economy), date and time (age, date difference, hours worked, time zones), math (percentages, ratios, averages, aspect ratios, batting averages), finance (home and car loans, loans, compound interest, salary, tips, VAT), fuel and cars (fuel cost, engine compression ratio), health (daily calorie needs (TDEE), dog and cat age, steps to miles) and reference data (US states and countries by population).
Where the numbers come from
Unit conversions use exact international definitions, such as 1 inch = 2.54 cm and 1 pound = 0.45359237 kg. Live exchange rates in the converter come from Coinbase’s public exchange-rate service and are fetched by your browser, with the time of the rate shown. The amount tables on the currency pair pages use the European Central Bank’s euro reference rates, dated on the page; for the New Taiwan dollar and Russian ruble, which the ECB does not publish, they use a dated Coinbase rate. Time zones use the IANA time zone database built into your browser. Population figures come from the U.S. Census Bureau (Vintage 2025 estimates) and the World Bank’s World Development Indicators, and each table names its source.
How the site is funded
Every tool is free. The site shows advertising served by Google AdSense, which pays for hosting and development. Ads are kept below the tools, so they never push the calculator out of view. See the privacy and cookie policies for how advertising cookies work and how to opt out of personalized ads.