Thats a good question! I can't find my tape measure!
Its 101 x 46 x 31cm or 12.2 x 18.1 x 39.7inches according to the manufacture but thats hood and everything!
I think inside dimensions from what I remember meauring are more like 100 x 40 x 30cm (Its a metric tank but for all you ordinary people thats 39.3 x 15.7 x 12inches) and then you can only fill it an inch from the top so most people would say its actually 120liters or 31.7 gallons but I work it out to contain 114liters on a good day which is 30.1 gallons.
You wish you hadn't asked now don't you!
