Question: how many mmbtu in 1 cubic meter?
Answer: 1 MMBtu is equal to 1 million BTU (British Thermal Unit). Natural gas is measured in MMBtu's. 1 MMBtu = 28.263682 m3 of natural gas at defined temperature and pressure. 1 standard cubic foot of natural gas yields ≈ 1030 BTU (between 1010 BTU and 1070 BTU, depending on quality, when burned).