2.3 g0.081 oz
A standard 2×4 LEGO brick weighs about 2.3 g (0.08 oz). BrickLink’s parts catalogue lists it at 2.32 g, which works out to roughly 430 bricks per kilogram, or about 195 per pound. Smaller bricks weigh less: a 2×2 is just over a gram, and a 1×1 is under half a gram.
| DUPLO brick, 2×4 | 12.2 g0.43 oz |
|---|---|
| LEGO brick, 2×4Part 3001, the classic brick | 2.32 g0.082 oz |
| LEGO brick, 2×2The BBC’s test brick weighed 1.152 g | 1.35 g0.048 oz |
| LEGO plate, 2×4 | 1.2 g0.042 oz |
| LEGO brick, 1×1 | 440 mg0.016 oz |
The 2×4 brick, part number 3001, weighs 2.32 g (0.082 oz) in the catalogue of BrickLink, the LEGO-owned marketplace for buying single parts. The other part weights on this page come from the same catalogue.
Weights barely vary from brick to brick because the bricks are made so precisely. LEGO has moulded them from ABS plastic since 1963, when it replaced cellulose acetate, and its moulding machines work to tolerances as small as 0.01 mm (10 micrometres).
In 2012, at the request of the BBC’s More or Less programme, engineers at the Open University crushed 2×2 bricks in a hydraulic press. On average a brick gave way at 4,240 newtons, the same as a mass of 432 kg (950 lb) resting on it. It did not shatter: it slowly squashed, like warm camembert.
Their test brick weighed 1.152 g, so it could carry the weight of about 375,000 identical bricks, a tower some 3.5 km (2.17 miles) tall. The lead engineer, Ian Johnston, thought a 2×4 brick would fail sooner. In practice no such tower could be built: it would buckle long before the bottom brick broke.
The modern brick, with tubes underneath that grip the studs, was filed for a Danish patent on 28 January 1958. Six 2×4 bricks can be combined in 915,103,765 different ways.
LEGO makes them in huge numbers: about 36 billion elements a year, or roughly 1,140 every second. At 2.32 g each, a million 2×4 bricks would weigh 2.32 tonnes.
About 430 standard 2×4 bricks, since each one weighs 2.32 g. A pound holds about 195.
An Open University test found a 2×2 brick fails at about 4,240 newtons, the same as 432 kg (950 lb) sitting on it. That is the weight of about 375,000 of those bricks.
A 2×4 DUPLO brick weighs about 12.2 g, roughly five times as much as a regular 2×4 LEGO brick.
ABS plastic, which LEGO has used since 1963. The earliest bricks were made of cellulose acetate.
Six 2×4 bricks can be put together in 915,103,765 different ways.
Last checked October 4, 2026.
