Your meter and bill use hm³, but gas is charged per MMBtu. Convert between the units instantly.
Convert units
The conversion, explained
1 hm³ = 100 m³ — hm³ means hecto cubic metres; this is the unit printed on SNGPL and SSGC bills.
1 hm³ ≈ 3.5 MMBtu at a gross calorific value (GCV) of about 990 BTU per cubic foot — the standard conversion both companies use. Your bill prints the exact GCV for your area, so the last decimal can differ slightly.
MMBtu is what you pay for: every slab rate on the tariff page is per MMBtu. To estimate a bill, convert your hm³ to MMBtu here, then use the bill calculator.
hm³
m³
MMBtu
0.25
25
0.875
0.50
50
1.750
0.90
90
3.150
1.00
100
3.500
1.50
150
5.250
2.00
200
7.000
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