How much does it cost to 3D print LEGO bricks?

A LEGO-compatible 2x4 brick costs about 7 cents to 3D print in PLA: 6 cents of filament and under a cent of electricity. LEGO’s US Pick a Brick store sells the genuine 2x4 brick for 21 cents. Count printer wear too and the printed brick costs 15 to 21 cents, close to the bought price.

How much does it cost to 3D print LEGO bricks?

A 3D-printed LEGO-compatible 2x4 brick costs about 7 cents in PLA. Printables model pages list the brick at 3 g of filament and 24 to 41 minutes of print time. At $19.99 per kg that is 6 cents of plastic, plus under 1 cent of electricity on an 80 W printer.

What one printed 2x4 brick costs

Two Printables models of the 2x4 brick list 3 g of PLA each. JuliCai’s prints in 24 minutes on a Creality Ender 3 at 0.2 mm layers. Philippe Lacoude’s takes 41 minutes on a Prusa MK3S at 0.1 mm layers.

Line	Ender 3, 0.2 mm, 24 min	MK3S, 0.1 mm, 41 min
Filament: 3 g at $19.99 per 1,000 g	$0.060	$0.060
Electricity: 80 W at $0.18 per kWh	$0.006	$0.010
Plastic and power	$0.066	$0.070
Printer wear and maintenance: $0.21 per hour	$0.084	$0.144
With printer wear	$0.150	$0.213

The inputs come from these sources:

• Filament. Polymaker lists PolyLite PLA at $19.99 per 1 kg spool on its US store.
• Electricity. Prusa measured an average of 80 W on its MK-series printers printing PLA. The U.S. Energy Information Administration (EIA) puts the average residential price at 18.19 cents per kWh for January through July 2026. At 24 minutes: 0.08 kW x 0.4 h = 0.032 kWh, which costs 0.6 cents.
• Printer wear. The $0.21 per hour is the print cost calculator’s placeholder: an $800 printer over 5,000 hours (16 cents) plus 5 cents of maintenance. Replace it with your own printer’s figures.

Both prints use the same 3 g, so layer height changes the time, not the plastic. On a printer you already own, each extra brick costs you the plastic and power line.

Bought bricks vs filament, per gram

A genuine 2x4 brick weighs 2.32 g, according to BrickLink’s catalog. At 21 cents, that is 9.1 cents per gram, against 2 cents per gram for PLA on a $19.99 spool. The smaller the brick, the more each gram costs:

Piece	Pick a Brick (US)	Weight	Price per gram
Brick 1x1	$0.07	0.44 g	15.9¢
Brick 1x2	$0.10	0.83 g	12.0¢
Brick 2x2	$0.13	1.35 g	9.6¢
Brick 2x4	$0.21	2.32 g	9.1¢
PLA filament, 1 kg spool	$19.99	1,000 g	2.0¢

Pick a Brick prices were checked on October 10, 2026; a 2x4 plate costs $0.14 there. The printed brick weighs more than the molded one, 3 g against 2.32 g, so compare cost per brick as well as per gram. The filament cost calculator prices your own spool per gram.

Is it cheaper to 3D print LEGO than to buy it?

On plastic alone, yes. A printed 2x4 brick costs about 7 cents in filament and power. LEGO charges 21 cents for the genuine brick on its US Pick a Brick store. Add printer wear at $0.21 an hour and the printed brick reaches 15 to 21 cents. Printed bricks also grip less evenly.

100 bricks, printed or bought

	Printed (24 min each)	Pick a Brick
Plastic and power	$6.60
With printer wear	$15.00
Price		$21.00
Time	40 printer hours	delivery

Printed: 100 x $0.066 and 100 x $0.150. Bought: 100 x $0.21. LEGO also adds a service fee to smaller Pick a Brick orders. The 40 hours is 100 x 24 minutes. To set your own hourly figure for wear, use the printer hourly rate calculator.

Printing pays off most for sizes you cannot buy loose. A Pick a Brick search for 4x18 and 8x16 bricks on October 10, 2026 returned none. FaronM’s LEGO-compatible set on Printables includes STL files for both.

Fit and clutch

Molded bricks are held to a far tighter tolerance than desktop printing. In its 2010 company profile, the LEGO Group says its moulds are “accurate to within 10 my (= 0.01 mm).” It also says only 18 elements in every million fail its quality standard. Hubs, a print service, quotes desktop fused deposition modeling (FDM) parts at ±0.5%, with a lower limit of ±0.5 mm. That is 50 times the 0.01 mm figure.

In practice, a printed brick can be too tight to press onto a genuine one or too loose to hold. Lacoude’s model uses the brick’s exact dimensions with no added clearance, so the fit depends on your printer. Print one test brick before a batch. If it fits badly, adjust the slicer’s XY size compensation, or scale the model, and print again.

How much does it cost to 3D print a LEGO set?

About $52 in filament and power for 790 pieces, if each piece is the size of a 2x4 brick. LEGO sells its 790-piece Large Creative Brick Box for $59.99, or 7.6 cents a piece. Printing 790 bricks at 24 minutes each takes 316 hours, about 13 days of nonstop printing.

Worked example: 790 pieces

A set mixes piece sizes. For scale, this treats every piece as a 2x4 brick, and smaller pieces use less plastic.

filament     790 x 3 g = 2,370 g x $19.99 / 1,000 g  = $47.38
print time   790 x 24 min                             = 316 h
electricity  316 h x 0.08 kW x $0.1819 per kWh       = $4.60
plastic and power                                     = $51.98
printer wear 316 h x $0.21                            = $66.36
with printer wear                                     = $118.34

At the 41-minute fine-layer time, the same 790 pieces take 540 hours.

Price per piece of a bought set

A set’s price per piece is its price divided by its piece count:

Set (LEGO US store)	Pieces	Price	Per piece
Large Creative Brick Box 10698	790	$59.99	7.6¢
Titanic 10294	9,090	$679.99	7.5¢

Both work out to about 7.5 cents a piece, close to the 6.6 to 7 cents a printed 2x4 brick costs in plastic and power. A set also comes with pieces that are hard to print well, such as clear windows and rubber tires, plus the instructions. Printing a set saves a little on 2x4-size pieces and more on smaller ones, but only while you leave printer wear and hours out.