2114 would be the better number to input since you measured it yourself. Remember, tires of the same size can vary, so if you want to be as accurate as possible that's why many measure it themselves.

Most bicycle computers use the mm measurement and you can input whatever number your measurement is. The only exception I encountered was with the Sigma computer, pre 2012 models, which required you to divide and multiply to get the input number if the chart number recommendation provided didn't match closely enough to be considered accurate.