Estimate the total filled weight of water, tank, stand, substrate and décor.
Open live calculator →180 litres of water plus a 32 kg tank and stand and 28 kg of contents weighs about 239.5 kg.
A filled aquarium is much heavier than it looks. Add the major components to create a practical load estimate before choosing a location.
The live tool updates immediately and shows the result in the units commonly used by aquarium keepers around the world.
Use the manufacturer’s empty weights when available.
Include sump, canopy and equipment.
Confirm heavy installations with a qualified building professional.
Water weighs almost exactly one kilogram per litre, so a mid-size 180 litre aquarium holds 180 kg of water alone—before you add roughly 30 kg of glass, a stand, and another 20–40 kg of substrate and rock. A complete 180 litre setup commonly exceeds 250 kg concentrated on less than half a square metre. That is like parking three adults permanently on one small table, which is why the stand and the floor both deserve real attention before filling day.
Purpose-built aquarium stands list a rated capacity—stay under it. Ordinary furniture usually cannot take a filled aquarium above about 60 litres, and sagging shelves crack tanks along the seam. On timber floors, place large tanks against a load-bearing wall and across joists rather than parallel to a single joist. For systems above roughly 400–500 kg, a structural engineer's opinion is cheap compared with the alternative.
Glass aquariums need even support: a stand that rocks or a floor that slopes concentrates the whole load on one corner and can crack the base seam months later. Check level in both directions with the tank empty, shim the stand—not the tank—and use a foam or polystyrene mat only if the manufacturer recommends one. Rimless tanks are especially sensitive and almost always require a flat mat and a dead-level surface.
Around 280–320 kg once you add roughly 200 kg of water, 30–40 kg of glass, a stand, and substrate and rock. Enter your own component weights for a closer estimate.
Concrete floors handle any home aquarium. On timber floors, tanks up to about 250 kg are generally fine near a load-bearing wall; larger systems deserve joist orientation checks and, above roughly 500 kg, professional advice.
Only small tanks. A 54–60 litre setup already weighs 75–90 kg filled, which exceeds what most bookshelves and sideboards are engineered to carry as a point load. A purpose-built stand is the safe choice from 60 litres upward.