Unit Converters & Measurement

Choosing the Right Conversion Tool

The length converter converts between metric and imperial units, from millimeters to miles. Inches to centimeters is the most common direction for screen sizes and furniture, and miles to kilometers for driving abroad and running. The weight converter works across grams, kilograms, ounces and pounds, which helps with foreign recipes and gym plates.

For shipping and e-commerce, the dimensional weight calculator matters in its own right: it calculates volumetric weight, because carriers bill whichever is higher, actual or dimensional weight. If you sell bulky products, set shipping prices with this in mind.

All converters run instantly in your browser. For official or commercial documents, the number of decimal places to round to depends on the standard agreed with the other party; round the result accordingly.