April 7, 2025

How to Calculate SNGPL Bill: A Step-by-Step Guide

April 7, 2025

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Najam

Calculating your SNGPL gas bill accurately can seem complex, but it becomes easy once you understand the process. In this guide, we’ll show you how to calculate SNGPL bill step by step, using a simple example.

Follow these easy steps to calculate your SNGPL gas bill based on your meter readings and ensure accurate billing.

SNGPL Gas Bill Calculation Process

Step 1: Calculate the Difference Between Readings

Gas Usage = Current Reading – Previous Reading
Example: If current reading is 1250 and previous reading is 1100, the difference would be 150 units.

Step 2: Apply Pressure Factor

Corrected Gas Volume = Gas Usage × Pressure Factor
Example: The gas usage is multiplied by the pressure factor to account for variations in pressure. If the pressure factor is 1.2, this would adjust the reading accordingly.

Step 3: Convert to Hundred m³ (Hm³)

Reading in Hm³ = Corrected Gas Volume ÷ 100
Example: The corrected volume is divided by 100 to convert to the billing unit Hm³ (hundred cubic meters).

Step 4: Calculate mmBTU Using Gas Conversion Value (GCV)

mmBTU = (Hm³ × GCV) ÷ 281.7385
Example: The Hm³ reading is multiplied by the Gas Conversion Value (GCV) and divided by the standard conversion factor 281.7385 to determine energy content in mmBTU.

Step 5: Determine Gas Bill Using the Slabs

Slab Usage of Gas in Hm³ Rs. Per MMBTU
1 Up to 0.25 500
2 Up to 0.60 850
3 Up to 1 1250
4 Up to 1.5 1450
5 Up to 2 1900
6 Up to 3 3300
7 Up to 4 3800
8 Above 4 4200

Slab-Based Calculation Process:

  1. Break the Usage into Applicable Slabs

    Example: For any usage amount, determine how much gas falls into each slab

  2. Calculate mmBTU for Each Slab Portion

    mmBTU for a slab portion = (Portion in Hm³ × GCV) ÷ 281.7385

  3. Calculate Cost for Each Slab

    Cost for a slab = mmBTU for that portion × Rate for that slab

  4. Sum All Slab Costs

    Total Gas Charges = Sum of all slab costs

Step 6: Add Additional Charges

Fixed Charge

Applied based on usage tier

Meter Rent

Standard monthly charge

Example: Add fixed charges (which vary by usage tier) and standard meter rent to the gas consumption charges

Step 7: Apply GST

GST = 18% × (Gas Charges + Fixed Charge + Meter Rent)
Example: Calculate 18% of the subtotal (all charges combined) to determine the GST amount

Final Bill Formula

Total Bill = Gas Charges + Fixed Charge + Meter Rent + GST
Note: This calculation process follows SNGPL’s billing methodology. Actual rates may vary.

Where to find the values on SNGPL gas bill?

You can find all the required parameters i.e. meter readings, GCV and pressure factor on your SNGPL gas bill. Use the image below as a reference:

IMPORTANT:

Please note that previous and current meter readings are displayed in 8-digit numbers, however the last three digits are after decimal places.

For example: 0645255 will be taken as 645.255 m3

Conclusion

Calculating your SNGPL bill can be a complex process, but by following the steps outlined above, you can easily determine your total charges. However, to make this process even simpler, you can also use our SNGPL Bill Calculator.

This tool will help you automatically calculate your gas bill by inputting your readings and gas usage, eliminating the need for manual calculations. Give it a try and save time while ensuring accuracy in your bill calculations!

How to Get SNGPL Bill Online (With Screenshots)

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