Fish Tank Dimensions and Weight Chart: Every Standard Size

Knowing the exact dimensions and filled weight of an aquarium before you buy it saves costly mistakes — a tank that does not fit a shelf or exceeds your floor’s load rating is a problem you want to catch on paper, not after 200 kg of water is in place. This fish tank dimensions weight chart from Gensou Aquascaping Singapore, drawing on over 20 years of experience at 5 Everton Park, provides the figures you need for every common tank size.

Standard Tank Dimensions

Manufacturers vary slightly, but the following measurements cover the most widely available rectangular glass tanks in Singapore. All dimensions are length x width x height in centimetres, with approximate filled weight in kilograms including substrate and hardscape.

• 5 gallon (19 L): 40 x 20 x 25 cm — approx. 25 kg filled
• 10 gallon (38 L): 50 x 25 x 30 cm — approx. 48 kg filled
• 15 gallon (57 L): 60 x 30 x 32 cm — approx. 70 kg filled
• 20 gallon (75 L): 60 x 30 x 40 cm — approx. 90 kg filled
• 29 gallon (110 L): 75 x 30 x 45 cm — approx. 130 kg filled
• 40 gallon (150 L): 90 x 35 x 45 cm — approx. 180 kg filled
• 50 gallon (190 L): 90 x 45 x 45 cm — approx. 230 kg filled
• 75 gallon (285 L): 120 x 45 x 50 cm — approx. 340 kg filled
• 100 gallon (380 L): 150 x 45 x 55 cm — approx. 450 kg filled
• 200 gallon (760 L): 180 x 60 x 70 cm — approx. 900 kg filled

Why Weight Matters in Singapore Homes

HDB flats are rated for a general floor loading of 150 kg per square metre in living areas. A 50-gallon tank on a stand with a 90 x 45 cm footprint (0.405 sq m) exerts roughly 570 kg/sq m — well above the guideline if concentrated on small legs. Distribute the load by using a flat-bottom stand that spreads weight evenly, and position heavy tanks against load-bearing walls or on ground-floor units whenever possible.

For tanks above 40 gallons in upper-storey HDB flats and condos, consulting a structural engineer is a prudent step. The cost of a brief assessment is trivial compared to water damage or flooring failure.

Cube and Non-Standard Tanks

Cube tanks — popular for nano aquascapes — have equal length and width. A 30 cm cube holds roughly 27 litres and weighs about 32 kg filled. A 45 cm cube holds approximately 91 litres at around 110 kg. These compact footprints fit on desks and shelves but concentrate weight on a smaller area, so verify surface strength carefully.

Calculating Volume for Odd-Shaped Tanks

For rectangular tanks, multiply length x width x height in centimetres and divide by 1,000 to get litres. Subtract roughly 10 % for substrate and hardscape displacement. A tank measuring 60 x 30 x 36 cm gives 64.8 litres gross, or about 58 litres of actual water volume. Our fish tank gallon calculator guide covers more complex shapes including bowfronts and hexagons.

Choosing the Right Stand

Never place a tank larger than 20 litres on furniture not rated for the weight. Purpose-built steel-frame stands with flat panels are the safest option and cost $60–$250 in Singapore depending on size. Wooden stands should use marine-grade plywood or solid hardwood — particleboard swells and fails when exposed to moisture over time. Check our aquarium stand guide for detailed recommendations.

Using This Chart for Planning

Before purchasing a tank, measure your intended space, confirm the weight your furniture or floor can support, and cross-reference with this fish tank dimensions weight chart. Matching the right size to your room and structure from the start avoids frustrating — and potentially expensive — surprises down the line.

Related Reading

• Fish Tank Gallon Calculator: Volume, Stocking and Substrate Math
• Best 10-Gallon Fish Tank Setup Guide: Stocking, Filter and Plants
• Best 50-Gallon Fish Tank Setup Guide: Centrepiece Fish and Layout
• Best Aquarium Stands: Weight Capacity, Materials and HDB Safety
• Freshwater Aquarium Setup for Beginners: Step-by-Step First Tank