Unit conversion toolbar

For version 1.7:

Unit conversion toolbar is shown on the picture:

Use the toolbar for conversion units of measurement of a category.

It is very simple! Select a category in that you need to convert units. In the second list select a system, from that you want to convert. Further, select base unit, target system and target unit.

Example:

For example, let's convert meters to feet of the USA unit system:

Now change the value of the meters:

The value of the feet is changed also.

On the same document you can convert another units.

Convert centimeters per second to kilometres per second of the velocity category:

How many cubic millimeters in a litre? Select the "Volume and capacity" category, litres and millimeters of the metre system:

You can convert units in any document.

Note that the units of Natural Calculator update over the Internet. New units add periodically. Please, make sure, that "Update over the Internet" checkbox is checked for the updating of units.