Conversion Calculator

Use it when your task matches one of these common needs: Convert between metric and U.S. customary length units. Convert weight or mass between grams, kilograms, ounces, pounds, and tons. It works best when you already know the value, source unit, target unit, format, or mode the page asks for.

In plain language: Most conversions multiply by a fixed factor to a base unit, then divide by the target factor. Temperature conversions use Celsius as the intermediate value. The examples on the page are there so you can compare your inputs with a filled-out example before copying the answer.

The main inputs are the value you want to convert and the from/to units or formats. Keep the original value in the first field and choose the target unit carefully.

Read the output next to your original input. If the tool changes format, units, encoding, spacing, or capitalization, compare a small sample before copying the whole result into another app.

Use exact professional references for regulated, medical, lab, engineering, or legal measurement work that requires a specified standard. Also check the source unit, target unit, format, decimal places, and selected mode because small input changes can change the result.

Length, mass, and volume conversions usually use one multiply-or-divide factor. Temperature scales have offsets, so Fahrenheit, Celsius, and Kelvin need their own formulas instead of a simple factor.

Not by unit labels alone. Volume and weight measure different things, so cups to grams, milliliters to ounces, or similar conversions need the ingredient density or product label before the answer is safe to use.

No. The tool runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.