At standard temperature and pressure, 1 metric ton of methane is about 1,400 cubic meters of gas , or about 49,000 cubic feet.

Quick math

Methane’s STP conversion is about 714 g per cubic meter.

So:

  • 1,000,000 g÷714 g/m3≈1,400 m31{,}000{,}000,g\div 714,g/m^3\approx 1{,}400,m^31,000,000g÷714g/m3≈1,400m3
  • 1,400 m3×35.3≈49,000 ft31{,}400,m^3\times 35.3\approx 49{,}000,ft^31,400m3×35.3≈49,000ft3

What that means

A ton of methane is a lot of gas by volume because methane is very light as a gas.

If you want it expressed at a different temperature or pressure, the volume will change a lot, since methane density depends on conditions.

In plain terms

  • 1 metric ton methane ≈ 1.4 million liters
  • ≈ 1,400 m³
  • ≈ 49,000 ft³

If you want, I can also convert 1 ton of methane into the size of a room, a truckload, or a balloon equivalent.