On the Magverter homepage click on the conversion type you would like to do (magnetic to true, or true to magnetic).

In the magnetic to true bearing conversion page, enter the magnetic bearing, the magnetic declination (always as a positive number) and the declination direction (in this case 'East'). Press 'Calculate..' to display the true bearing.

Staying in the magnetic to true bearing conversion page, enter the magnetic bearing, the magnetic declination (as a positive number) but enter the declination direction as 'West'. Press 'Calculate..' to display the true bearing.

Click 'Next/Back' to move to the true to magnetic bearing conversion page, enter the true bearing, the magnetic declination (as a positive number) and the declination direction (in this case 'East'). Press 'Calculate..' to display the magnetic bearing.

Staying in the true to magnetic bearing conversion page, enter the true bearing, the magnetic declination (as a positive number) but enter the declination direction as 'West'. Press 'Calculate..' to display the magnetic bearing.