What is 14 30mm on aps c in full frame?

14-30mm on APS-C gives the view of 21-45mm on full frame.

The same view on every common format:

• Medium format (44 x 33): 27-57mm
• Full frame: 21-45mm
• APS-C (yours): 14-30mm
• APS-C (Canon): 13-28mm
• Micro Four Thirds: 10-22mm
• 1-inch: 7.8-17mm
• 1/1.3-inch: 5.8-12mm
• 1/1.7-inch: 4.6-9.8mm
• 1/2.3-inch: 3.8-8mm

Crop factors are by the sensor diagonal, rounded as they're usually quoted; a format with a different shape (4:3 against 3:2) frames a little differently across the width. More in the focal length converter.

Computed from the sensor sizes, not written by a model.