Conversion Factors

To convert from a To a You need to
ccf
100 cubic feet-Standard measurement of gas useage
btmcf Divide by 10
btmcf
The point at which the gas is used
mcf Divide by the shrink percent
mcf
Measurement of gas usage prior to line loss, equal to 1,000 cubic feet
dth Multiply by the BTU factor
dth
Measurement of gas usage which includes the heat value of the gas
the dth volume * (NYMEX Settle + Contract Basis) will give you your total Commodity Charge for the month. See Note 1

NFGD Transportation Shrinkage Rates

Reference: National Fuel Transportation Service Shrinkage Rates

NY  1.90% → 98.1% Effective 9/1/2006

PA  0.31% → 99.99% Effective 8/1/2012

2013
NFGD BTU Factors
Reference: National Fuel Transportation Historical Btus for Conversion of Dths to Mcfs
DISTRICT Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
NY
dth / mcf
1.040 1.042
PA
dth / mcf
1.078 1.079
2012
NFGD BTU Factors
Reference: National Fuel Transportation Historical Btus for Conversion of Dths to Mcfs
DISTRICT Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
NY
dth / mcf
1.033 1.036 1.035 1.038 1.042 1.039 1.032 1.040 1.035 1.041 1.043 1.045
PA
dth / mcf
1.074 1.076 1.074 1.073 1.074 1.079 1.081 1.070 1.077 1.079 1.076 1.070

Note 1: The monthly gas usage on your Vineyard invoice may vary slightly from the usage on your NFG invoice due to the fluctuations in meter read cycles. VOG invoices customers on a monthly basis (1st of the month to EOM), whereas, NFG invoices transportation customers based on the meter read cycle as determined by NFG (i.e. If your meter is read on the 15th, your usage will be based on the read taken on the 15th of the pervious month and the 15th of the current month). Please contact your Marketing Representative if you should have any questions regarding your billing cycle.