Loss factor

Loss factor may refer to:
 * Loss factor, in real estate the percentage of the building's area shared by tenants or space that are dedicated to the common areas of a building used to calculate the difference between the net (usable) and gross (billable) areas.
 * Load-loss factor, in electricity distribution a ratio between average and peak values of loss of electric power between the generator and the consumer.
 * Dielectric loss.