Gas Bill Calculator

Work out gas bill instantly with clear inputs, formula shown and shareable results.

About Gas Bill Calculator

A gas bill is energy consumed times the unit rate, plus a daily standing charge for network and metering costs, plus tax. The effective rate per kilowatt-hour matters when comparing tariffs, because a low unit rate paired with a high standing charge is expensive for low users.

Formulas

Gas bill

Bill = units x unit rate + standing charge x days, plus applicable tax

Effective rate

Effective rate = total bill / units consumed

Worked example

With the default values below, Gas Bill Calculator returns Total Gas Bill of $9,135.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Energy Consumedminimum 0 kWh: 1,200 kWh
Unit Rateminimum 0 per kWh: 6.5 per kWh
Standing Chargeminimum 0 per day: 30 per day
Billing Periodminimum 1 days: 30 days

Results

Total Gas Bill: $9,135.00
Energy Charge: $7,800.00
Standing Charges: $900.00
Effective Rate Per kWh: $7.6125

Step by step

1Values used
2Gas bill
3Effective rate
4Total Gas Bill= 9,135.00
5Energy Charge= 7,800.00
6Standing Charges= 900.00
7Effective Rate Per kWh= 7.6125

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation or tax into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why compare on effective rate?

Standing charges are fixed regardless of use. For a low-consumption household they can be half the bill, so headline unit rates alone can point to the wrong tariff.

Does the tax rate vary?

Yes by jurisdiction and customer class. Domestic energy often attracts a reduced rate while commercial supply is taxed at the standard rate. Check the applicable rate for your bill.