K-factor represents the adjustment percentage applied to account for pipeline losses, fuel consumption, and operational factors when transporting oil or gas through pipeline systems. This factor compensates shippers for normal operational losses that occur during transportation, typically ranging from 0.1% to 1.0% depending on pipeline length, product type, and operational characteristics.

K-factor calculations consider evaporation losses, pipeline fuel requirements, measurement uncertainties, and other operational factors that reduce delivered volumes compared to shipped quantities. Understanding K-factors is essential for accurate volume accounting, pricing calculations, and contract settlements in pipeline transportation. Different pipeline systems may have varying K-factors based on their specific operational characteristics.

Real-world example: A natural gas pipeline applies a 0.5% K-factor, meaning shippers must deliver 1,005 MMBtu to ensure 1,000 MMBtu arrives at the destination, with the 5 MMBtu difference covering compression fuel and system losses.