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Gas Conversions

BTU · Therm · MCF · Energy & Volume Units

Natural Gas Unit Converter
Converts between energy units (BTU, Therm, MMBtu, Dekatherm, GJ, kWh) and volume units (CF, CCF, MCF, MMCF, BCF, TCF, Sm³). Uses industry-standard factors per GPSA and ISO 13443. Essential for custody transfer, billing, and regulatory reporting.

Conversion Type & Value

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From / To Units

Quick Reference

Energy Equivalents:
1 Therm = 100,000 BTU
1 MMBtu = 1 Dekatherm
1 GJ = 947,817 BTU
1 kWh = 3,412 BTU

Volume (same std conditions):
1 Sm³ = 35.31 SCF
1 MCF = 10 CCF = 1,000 CF
1 BCF = 1,000 MMCF

Typical Gas (1000 BTU/CF):
1 MCF = 1 MMBtu = 10 Therms

📚 Learn the Theory

Standard conditions (US vs ISO), actual vs standard volume, mass-volume relationships, and custody transfer considerations

Read Engineering Guide →

About This Calculator

Converts between gas energy and volume units for custody transfer, billing, and process engineering.

Energy Units:

  • BTU, Therm, Dekatherm, MMBtu
  • Gigajoule (GJ), Kilowatt-hour (kWh)
  • MCF (volume-based, requires heating value)

Volume Units:

  • CF, CCF, MCF, MMCF, BCF, TCF
  • Cubic Meters (Sm³/Nm³)

References:

  • GPSA
  • ISO 13443 (Standard Conditions)
  • AGA Report No. 5 (Heating Value)

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