Please Convert This is a free website for quick, accurate unit and currency conversions. Whether you’re following a recipe, checking a product’s dimensions, planning a trip abroad, or working through homework, you can get an answer in seconds — no sign-up, no download, no app.
What you can convert
- Length — millimeters, centimeters, meters, kilometers, inches, feet, yards and miles
- Weight — milligrams, grams, kilograms, ounces, pounds, stone and metric tons
- Temperature — Celsius, Fahrenheit and Kelvin
- Volume — milliliters, liters, cubic meters, teaspoons, tablespoons, cups, pints, quarts and gallons
- Area — square meters, square feet, acres, hectares and more
- Speed — km/h, mph, meters per second and knots
- Time — seconds, minutes, hours, days and weeks
- Currency — major world currencies at live exchange rates
How our converters work
Every unit converter uses standard, internationally recognised conversion factors — for example, one inch is defined as exactly 2.54 centimeters. Calculations run directly in your browser, so results appear instantly as you type, and the numbers you enter are never sent to or stored on our server.
Exchange rates for the currency converter come from the European Central Bank’s published reference rates and are refreshed hourly. They’re ideal for quick estimates, but banks and payment providers usually add their own margin, so check with yours before making a transfer.
Each converter page also includes a quick-reference list of the most commonly looked-up conversions, so you can find an answer at a glance.
Why the site is free
Please Convert This is supported by advertising. The ads you see help cover hosting and development, which is what lets us keep every converter free for everyone. We place ads so they stay clear of the converter fields and buttons, so you can always use the tools without interruption. You can read more about ads and cookies in our Privacy Policy.
Accuracy and feedback
We check our conversion factors against official standards, but mistakes can happen. If you spot an error, or there’s a converter you’d like us to add, please get in touch — suggestions from visitors help decide what we build next.