Utility Bill Calculator

A utility bill is a fixed charge plus a per-unit charge that usually steps up through blocks, and the two behave completely differently when you try to cut it. Enter your usage, the block sizes and rates off the bill, the fixed charge and any tax, and this prices the bill tier by tier and reports both the average rate and the marginal rate, which is what one more unit really costs. It also reprices the bill at a lower usage, so a saving that crosses a tier boundary is worked out properly instead of multiplied by an average. A second action adds electricity, gas, water and flat charges into one household total and shows how much of it you would pay at zero usage.

Calculator Type

The Meter Reads In

Units Used in the Period (kWh) *

Tier 1 - Size of the First Block (kWh)

Leave every tier block at zero if your rate is flat, and put the flat rate in the last box.

Tier 1 Rate per Unit ($)

Tier 2 - Size of the Next Block (kWh)

Tier 2 Rate per Unit ($)

Tier 3 - Size of the Next Block (kWh)

Tier 3 Rate per Unit ($)

Rate Above Those Blocks, or Your Flat Rate ($ per unit) *

Fixed Charges for the Period ($)

The customer charge, service charge, meter rental, standing charge or basic charge. Whatever you pay before using a single unit.

Tax and Percentage Riders (%)

Applied here to the whole subtotal, fixed charges included, which is how most utilities bill it.

Units You Might Cut or Add, for the Marginal Figures (kWh)

Days in the Billing Period *

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Electricity Used (kWh)

Electricity Rate ($ per kWh)

Electricity Fixed Charge ($)

Gas Used (therms or CCF)

Gas Rate ($ per therm or CCF)

Gas Fixed Charge ($)

Water Used (thousand gallons, CCF or m3)

Water Rate ($ per unit)

Water and Sewer Fixed Charge ($)

Sewer is often billed on metered water volume too. If yours is, add the sewer rate to the water rate above.

Other Fixed Utilities - Internet, Waste, Heating Oil ($)

Tax on the Metered Utilities (%)

Days in the Period *

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