Canonical Definition
A meter multiplier (or billing constant) is the factor applied to a meter's recorded readings to determine actual consumption when the meter measures only a scaled portion of the load, typically through instrument transformers (CTs and PTs) on larger services. Actual usage equals the meter reading difference multiplied by the multiplier. Most residential meters read usage directly and have a multiplier of one; larger commercial and industrial services commonly have multipliers greater than one, shown on the bill.
Explanations
A meter multiplier is a number used to scale up your meter's reading. Your true use equals the reading change times that number. Some meters, mainly on large buildings, track only a slice of the power flowing. So the reading must be scaled up. For most homes the multiplier is simply 1. That means the meter reads use directly. If your bill shows a multiplier, it is part of the math.
A meter multiplier is a number used to scale up what some meters count. It is like a map. One inch on the map can mean one mile in real life.
Analogy Bank
A meter multiplier is like a model-train scale — the meter tracks a miniature version of the flow, and the multiplier restores it to full size.
It's like gauging a river by sampling one channel and scaling up — the meter watches a known fraction of the load.
For large services, it's like weighing one pallet and multiplying by the count rather than weighing the whole truckload.
Do Not Say
- ✕Do not assume a customer's multiplier is one; tell them to check the multiplier printed on their bill.
- ✕Do not recalculate a customer's usage from readings; refer billing math disputes to the utility.