Tiered Unit Gas Bill Calculator

Using the gas bill calculator couldn't be simpler. Just enter your first meter reading followed by your current meter reading then hit the calculate button and the Gas Bill Calculator will do the rest.

If you have more precise figures regarding the formula used to convert your gas usage to KWh then hit the advanced link and enter them. Hover over each item in the advanced section for a detailed explanation of what each figure represents.

This page features the old Gas Bill Calculator, we've made some important changes to our calculator so you may want to use the new version here.


Enter Your First Meter Reading:

Enter Your Second Meter Reading:

Don't change any of these figures unless you are 100% sure what they mean.
Many of these figures can be found on your bill.


Tier 1 Rate

Tier 2 Rate

Conversion Factor

Calorific Value

Volume Correction

Your Usage in KWh:

An Estimation of Your Bill (inc' VAT at 5%):