Those units are incompatible. There is no conversion factor. Your question is like asking how many dump trucks are in a barrel of apples. The meter is a unit of length, whereas the gallon is a unit of volume.
To convert cubic meters to (US) gallons, use this conversion factor: 264.2 (there are 264.2 US gallons in one cubic meter of volume). Therefore:cm3 x 264.2 = US gallons
100m3 equates to 26,417.2 US gallons.
There are approximately 219.969 English gallons in one cubic meter of water.
One US gallon is 0.0037854 cubic meters.
how big is the barrel..... Standard barrel is 55 gallons. If you are asking how many gallons from a barrel of crude-restate.
Approx 110 gallons.
1 cubic meter = 264.172052 US gallons.
264.172052 gallons.
1 cubic meter is 264.172052357 US gallons.
One cubic meter is 264.172 US gallons.
1 cubic meter = 219.969 Imperial liquid gallons
1 cubic meter = about 220 (219.969157) Imperial gallons.
1 cubic meter = 219.969 Imperial liquid gallons
1 cubic metre equates to 264.17 US gallons or 219.97 Imperial gallons.
There are 264.2 US gallons in one cubic meter of water.
1 cubic meter = about 220 Imperial gallons.
One Imperial gallon = about 0.004546 cubic meters.