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MCF to MMBTU Calculator

Natural Gas Energy Conversions: MCF, Therms, GJ, Flow Rates & Cost

GPA 2145-16 ISO 6976 EIA Standards
Comprehensive Gas Unit Converter
Convert between US and metric gas units. Volume, energy, flow rates, and standard conditions. Heating values per GPA 2145-16, EIA, and ISO 6976 standards.
Calculation Mode:

MCF ↔ MMBTU Conversion

MCF

Gas Heating Value

Base: 14.73 psia, 60°F (default US EIA)

📚 Learn the Theory

Understand gas measurement principles, heating values, and industry standards

Read Engineering Guide →

How to Convert Natural Gas Units

Natural gas volume (MCF) and energy content (MMBTU) are related by the gas heating value. While volume measures physical space, energy measures the heat generated.

Common Conversion Formulas

  • MCF to MMBTU: MMBTU = MCF × (BTU/cf / 1000)
  • MCF to Therms: Therms = MCF × (BTU/cf / 100)
  • MMBTU to GJ: 1 MMBTU = 1.055056 GJ

Gas Flow Rate Examples

Based on a standard heating value of 1,038 BTU/scf:

  • MMSCFD to Therms/day: 10 MMSCFD = 103,800 Therms/day
  • MMSCFD to Dth/day: 10 MMSCFD = 10,380 Dekatherms (Dth)/day

Full List of Supported Conversions

Volume Units:
SCF, CCF, MCF, MMCF, BCF, Sm³ (Standard m³), Nm³ (Normal m³), MSm³.
Energy Units:
BTU, MMBTU, Therms, Dekatherms (Dth), MJ, GJ, TJ, kWh, MWh.
Flow & Heating Rates:
MMSCFD, MCFD, SCFM, Sm³/hr, MMBTU/day, Therms/day, GJ/day, BTU/scf, MJ/m³, kWh/m³.

Engineering Reference

Core Conversions

1 MMBTU = 1 Dekatherm = 10 Therms
1 MMBTU = 1.055056 GJ
1 MCF ≈ 1.038 MMBTU (at 1038 BTU/cf)

MMBTU = MCF × (BTU/CF ÷ 1,000)

Volume Conversions

1 m³ = 35.3147 ft³
1 Nm³ = 1.0549 Sm³
1 BCF = 28.317 MSm³

Standard Conditions

StandardTP
US (EIA)60°F14.73 psia
US (GPA)60°F14.696 psia
ISO/Sm³15°C101.325 kPa
Nm³0°C101.325 kPa

Heating Value (HHV)

GasBTU/scf
Pipeline Avg1,038
Pure Methane1,010
Ethane1,770
Propane2,516

Sources: GPA 2145-16, GPA 2172-19, ISO 6976:2016, ASTM D3588, EIA Natural Gas Monthly. Heating values vary by composition—contact your gas supplier for actual values.

⚡ Quick Reference

Pipeline Quality1,038 BTU/CF
Pure Methane1,010 BTU/CF
1 MMBTU =1.055 GJ
1 Therm =0.1 MMBTU
1 m³ =35.31 ft³

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