How to use the gas bill calculator
- 1 Enter the gas used this month in hm³ (hundred cubic metres), from your meter readings or last bill.
- 2 Choose protected or non-protected. Protected status depends on low winter use in the previous year.
- 3 Check the MMBTU per hm³ figure printed on your bill; it depends on the heating value of gas in your area.
- 4 Add any arrears or other charges, then read the estimated bill and the breakdown.
Worked example
A non-protected home using 1.2 hm³ in a month, with 3.6 MMBTU per hm³. That is 4.32 MMBTU in the 1 to 1.5 hm³ slab, charged at Rs 1,450, so gas charges are about Rs 6,264. Adding the Rs 1,500 fixed charge, Rs 40 meter rent and 18% sales tax of about Rs 1,398, the estimated bill is about Rs 9,202.
Keeping the winter gas bill down
- Watch the 1.5 hm³ line: for non-protected homes, crossing 1.5 hm³ moves every unit from Rs 1,450 to Rs 1,900 per MMBTU and doubles the fixed charge from Rs 1,500 to Rs 3,000.
- Read the meter weekly: in December and January, a quick weekly reading shows whether you are heading into the next slab while there is still time to cut back.
- Geysers: a geyser left on all day is often the biggest user; a timer or a lower thermostat setting saves the most.
- Protected status: keeping winter use within 0.9 hm³ a month can earn protected rates the next year, with a fixed charge of Rs 600.
Heating with electricity instead? Compare with the Electricity Bill Calculator, or work out what a heater costs per hour with the Appliance Running Cost Calculator.
Features
OGRA slab rates
Domestic rates per MMBTU for protected and non-protected homes, from the current OGRA notification.
Slab warning
Shows which slab you are in, because the whole month is charged at that slab's rate.
Full breakdown
Gas charges, fixed charges, meter rent and sales tax listed separately.
When to use it
Winter budgeting
Gas use jumps in December and January. Estimate the bill before you turn up the heater, and keep your use under a slab limit where you can. Compare with the Electricity Bill Calculator for heating with electricity.
Checking a bill
If a bill looks too high, enter the hm³ shown on it to see whether the slab, fixed charge and tax add up.
Geyser and heater planning
See how much an extra 0.5 hm³ a month for a gas geyser adds. Planning a solar water heater instead? Try the Solar System Calculator.
Tenants and landlords
Share a gas bill fairly between floors or tenants. Agreeing a new rent at the same time? Use the Rent Increase Calculator.
Related Bills and Energy tasks
Frequently asked questions
What is hm³ on a gas bill?
hm³ means hundred cubic metres. A reading of 1.2 hm³ is 120 cubic metres of gas. SNGPL and SSGC use it to decide your slab, and then convert it to MMBTU to work out the charge.
What are the gas slab rates for domestic consumers?
Protected homes pay Rs 200 to Rs 350 per MMBTU in four slabs up to 0.9 hm³. Non-protected homes pay Rs 500 per MMBTU up to 0.25 hm³, rising to Rs 1,450 at 1 to 1.5 hm³, Rs 3,300 at 2 to 3 hm³ and Rs 4,200 above 4 hm³. These rates have applied since 1 July 2025.
Who is a protected gas consumer?
A domestic consumer whose average use in the previous winter months stayed within the protected limit of 0.9 hm³ a month. The status is shown on your bill and is reviewed each year.
What are the fixed charges on a gas bill?
Rs 600 a month for protected consumers. Non-protected consumers pay Rs 1,500 a month when use is up to 1.5 hm³ and Rs 3,000 above that. Meter rent of Rs 40 is added as well.
Why did my bill jump when I used only a little more gas?
The whole month's gas is charged at the rate of the slab you fall in. Going from 1.5 to 1.6 hm³ moves every unit from Rs 1,450 to Rs 1,900 per MMBTU and doubles the fixed charge, so a small extra use can add thousands.
How is hm³ converted to MMBTU?
The company multiplies the volume by the gas heating value (GCV) and a pressure factor for your area. Many bills show about 3.5 to 3.7 MMBTU per hm³. Use the figure printed on your own bill for the closest estimate.
Is sales tax charged on gas bills?
Yes, 18% sales tax is charged on the gas and fixed charges. Late payment surcharge and arrears are added separately.
Are SNGPL and SSGC rates the same?
Domestic sale prices are set by the federal government on OGRA's advice and are the same for SNGPL and SSGC consumers. The conversion factor and some local charges can differ.
How can I lower my winter gas bill?
Keep monthly use below a slab limit, especially 1.5 hm³, service the geyser and lower its thermostat, use a timer, and heat only the rooms you use. Check for leaks if use rises without reason.
Results are estimates based on the official rates linked above. Confirm important figures with the issuing authority or a qualified adviser before you act on them.
Built and reviewed by Hamza Farooq, founder and lead developer
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