- ventilation
Can you vent a 3D printer through a dryer vent?
No. The building code says a dryer's exhaust duct must serve the dryer alone. Why sharing it is unsafe, and how to give a printer its own 4-inch wall outlet.
The 3D Calculators Team builds the calculators on this site and writes the articles that explain them. Each explainer marks which defaults are cited figures and which are placeholders, links every cited figure to its source, and shows the date the figures were last checked.
Updated
The explainer under each calculator writes out how the tool gets its result, so the math can be checked by hand. A default value is either a figure taken from a cited document, such as a data sheet, slicer source code or a government statistic, or a round placeholder that the explainer labels as an example. The Sources list on each page gives the day every document was consulted, and the "Figures last checked" line gives the day the page's numbers were last compared against them.
The help center covers how to use the tools and read their results, and Defaults and sources explains how each default was chosen.
No. The building code says a dryer's exhaust duct must serve the dryer alone. Why sharing it is unsafe, and how to give a printer its own 4-inch wall outlet.
3D printer enclosure dimensions: the printer's reach with the bed at both ends of travel, plus 100 mm per side. Sizes for the A1, MK4S, Ender-3 V3 and Neptune 4.
Enclosure temperature by filament: 45 °C at most for PLA and TPU, 35 to 50 °C for PETG, 45 to 60 °C for ABS, ASA, PC and nylon, from makers' data sheets.
A 3D printer exhaust fan needs only about 10 to 25 CFM for the heat. Fan types compared by airflow and static pressure, plus DIY wiring, kits and bathroom fans.
A 3D printer vent hose should be 4 inches (100 mm). The duct math behind that size, how long the run can be, and flex hose versus rigid vent pipe.
Ender 3 enclosure dimensions: at least 440 × 455 × 465 mm inside, 475 × 470 × 620 mm for the V2, plus Creality's enclosure sizes and volumes in ft³ and m³.
Heat a 3D printer enclosure with the bed at 100 °C and the door shut, or add a thermostat-controlled PTC heater. Watts, heat-up times and DIY safety limits.
How much ventilation does a 3D printer need? At least 6 air changes an hour for the room, 96 CFM in a 10 x 12 ft room, or 9 to 23 CFM through an enclosure.
One 3D printer needs about 9 to 23 CFM of exhaust, and 4-inch inline duct fans are rated 165 to 226 CFM. Fan size, filters, speed and grow tents.
Keep enclosure air at or below 45 °C (113 °F) for PLA, or the filament softens in the extruder and clogs. When to open the door, and what fan holds 40 °C.
Yes, a resin 3D printer needs ventilation: 3 to 6 air changes an hour, or 48 to 96 CFM for a 10 x 12 ft room. Room, enclosure and IPA wash figures.
No. The building code sends every exhaust fan's air outdoors, never into an attic, soffit or ridge vent. Where a 3D printer vent can end instead, with clearances.
Bambu Lab printers take layers of 20% to 70% of the nozzle: 0.08 to 0.28 mm on a 0.4 mm nozzle, with a 0.20 mm first layer. Limits and presets per printer.
Creality Print sets 0.20 mm layers and a 0.20 mm first layer on every Ender-3, K1 and K2 with a 0.4 mm nozzle; its profiles allow 0.08 mm up to 0.20 to 0.36 mm.
Yes: thinner layers shrink the steps on curves and slopes, but 0.08 mm took 2.18 times as long as 0.20 mm in Bambu Lab's test. Filament use barely changes.
Print the first layer about 125% of the nozzle wide: 0.5 mm on a 0.4 mm nozzle in Bambu Studio and Prusa profiles. The wider line grips the bed better.
HueForge's default layer height is 0.08 mm, printed on a 0.16 mm first layer at 100% infill. Match both in your slicer or every color swap shifts.
Acceleration (mm/s²) is how fast speed changes; jerk (mm/s) is the speed change allowed instantly at a corner. Junction deviation = 0.4 × jerk² ÷ acceleration.
Use 0.04 to 0.16 mm layers with a 0.2 mm nozzle (0.14 mm max on Bambu Lab). Start at 0.10 mm with a 0.10 mm first layer and 0.22 mm lines.
A 0.4 mm nozzle prints 0.08 to 0.32 mm layers, 0.20 mm by default and for the first layer. Bambu Lab caps it at 0.28 mm; slicers refuse over 0.40 mm.
Use 0.12 to 0.48 mm layers with a 0.6 mm nozzle (0.42 mm max on Bambu Lab), 0.30 mm to start, and a 0.30 mm first layer, no more than 0.39 mm.
Use 0.16 to 0.64 mm layers on a 0.8 mm nozzle, at most 0.56 mm on Bambu Lab. Start at 0.40 mm, with a 0.40 mm first layer and 0.82 to 0.9 mm lines.
PLA prints at 0.20 mm on a 0.4 mm nozzle, with a 0.20 mm first layer. PETG, ABS, ASA and TPU use the same heights; each filament caps the speed.
Bambu Studio and OrcaSlicer warn when layer height passes the printer's Max limit, 0.28 mm on a Bambu 0.4 mm nozzle. Slicing stops only above the nozzle size.
Outer wall line width on a 0.4 mm nozzle: 0.42 mm in Bambu Studio, 0.45 mm in PrusaSlicer, 0.40 mm in Cura. Inner wall, top, infill and support too.
Print an FDM lithophane at 0.10 to 0.12 mm layers; about 0.2 mm is the coarsest that still looks right. Plus infill, walls, thickness and speed.
Print Klipper's ringing tower (1,500 to 7,000 mm/s² in 500 mm/s² bands) or run SHAPER_CALIBRATE, then set max_accel at the last clean band.
Prusa printers default to 0.20 mm layers on a 0.4 mm nozzle (0.15 mm on the MK3S) and a 0.20 mm first layer. PrusaSlicer presets for every printer and nozzle.
Use 0.05 mm layers on a resin printer. The Elegoo Saturn 4 Ultra and Mars 5 Ultra accept 0.01 to 0.2 mm, and thicker layers need longer exposure.
On a 0.4 mm nozzle, 0.15 to 0.20 mm layers test strongest. Thinner layers don't bond better, and 0.30 mm hooks held half the load in CNC Kitchen's test.
Make FDM walls at least 0.8 mm thick and 1.5 mm where you can: 2 and 4 walls on a 0.4 mm nozzle. Wall counts per slicer, resin minimums and walls vs infill.
Layer height is the thickness of each printed layer, set in the slicer. 0.20 mm is standard on a 0.4 mm nozzle, with presets from 0.08 to 0.28 mm.
A 1/72 scale figure of a 1.73 m man is 24.0 mm (0.95 in) tall. How 1/72 lines up with 20mm and 15mm, and the slicer percentage to convert between them.
1/48 is 1.5 times the size of 1/72 and about 3.4 times the volume. How 1/35, 1/144, 1/76, 1/100 and 1/64 compare, with a Spitfire and a figure at each scale.
A 32mm miniature is 4 mm (14.3%) taller than a 28mm one and 1.49 times the volume. Ratios, heroic proportions, base sizes and mixing the two.
Marvel Legends is 6-inch scale, or 1:12. Black Series, G.I. Joe Classified and WWE Elite are 1:12 too; NECA is about 1:10, Hot Toys 1:6 and JoyToy 1:18.
Barbie is 1:6 scale (playscale): an 11.5 in doll for a 5 ft 9 in woman. Furniture sizes at 1:6, American Girl at about 1:3, and the slicer % for doll prints.
Bolt Action is 28mm with 1:56 vehicles; Konflikt '47 is 28mm too. Flames of War is 15mm (1:100). The slicer % to move a tank file between them: 56% or 178.57%.
D&D is 1:60 scale: one inch on the grid is 5 feet, and minis are 28mm. The space and base for every creature size, Tiny to Gargantuan, in inches and mm.
Dollhouse furniture is 1:12 (1 inch to 1 foot) as standard; 1:24 and 1:48 are the smaller scales. KidKraft, Calico Critters and Rolife, and the slicer % to print.
Hot Wheels are 1:64 scale, and so are Matchbox cars; Hot Wheels XL is 1:43. How far real castings stray from 1:64, and the sizes to print 1:64 garages.
HO is 1:87.1 on 16.5 mm track. The ratio and track gauge of N, O, OO, G, Z and S trains, with figure heights and the slicer percentage for each scale.
Select the model, press S and type a percentage in the Scale row with uniform scale ticked, or type a size in mm. Bambu Handy has no scale option.
Yes, but walls under two lines (0.8 to 0.86 mm on a 0.4 mm nozzle), fine details and screw holes fail. At 200%, a solid part takes 8 times the plastic.
Star Wars: Legion has no official scale; reviews put it at 28mm to 35mm, about 1:49 to 1:62. Shatterpoint is 40mm (about 1:43) and X-Wing is 1/270.
Warhammer 40K is 28mm heroic, about 1:56 to 1:60, with newer kits near 32mm (1:54). Age of Sigmar, The Old World, Legions Imperialis and Epic scales too.
1/72 scale means 1 inch on the model is 6 feet in reality. A real foot is 4.23 mm, a meter 13.9 mm, a person 24 mm and a Spitfire 156 mm across.
Counterbore hole 3D print sizes: for M3, model 6.5 mm wide and 3.4 mm deep over a 3.4 mm hole. Tables for M2 to M8 and #4 to 1/4 in, and printing it face down.
3D print countersink sizes: 90° for metric and 82° for inch flat head screws, 0.2 mm over the head's sharp diameter. M3 socket: 6.92 mm over a 3.4 mm hole.
A 3D print living hinge needs a web 0.4 to 0.6 mm thick, two or three layers. In a fold test, PP passed 1 million folds and PLA about 160. Sizes and settings.
3D print snap fit design: undercut = 0.67 × strain × length² ÷ thickness. Strain limits for PLA, PETG and ABS, 0.20 mm clearance per side, and print the arm flat.
How to 3D print hinges: a bore 0.40 mm over the pin for an assembled hinge, 0.30 to 0.40 mm per side printed in place. Sizes for filament, M3 and snap-on pins.
A 608 bearing is 8 mm bore, 22 mm outside and 7 mm wide. What 608ZZ and 608-2RS mean, and the hole to print: 21.90 mm press fit, 22.20 mm slip fit.
A 3D print annular snap fit needs an undercut of strain times diameter: about 0.5 mm on a 25 mm PLA cap and 0.9 mm in PETG, with the ring printed standing up.
3D print bearing press fit: draw the bore 0.10 mm under the bearing's outside diameter, 21.90 mm for a 608. Bore sizes for 623 to 6002, 6800, LM8UU and bushings.
D-shaft coupler or knob to 3D print: model 5.20 mm with 4.70 mm across the flat for a 5 mm stepper shaft. Bore sizes for 6 mm, 5 mm and 1/4 in D-shafts.
3D print magnet hole size: model the hole 0.10 to 0.15 mm over the magnet for a press fit, 0.20 to 0.30 mm for glue, and 0.1 to 0.2 mm deeper. Sizes by magnet.
3D print nut trap sizes for M2 to M8 and US nuts: model the hex pocket 0.2 mm wider than the nut across flats (5.7 mm for M3) and 0.1 mm deeper.
3D print O-ring groove sizes: make it 70 to 80% of the cross-section deep for 20 to 30% squeeze. Face and radial seal tables, a worked example and print settings.
3D print press fit tolerance: model 0.05 mm of interference per side (0.10 mm on the diameter) in PLA, less in ABS and nylon. Test print and pressing steps.
Print-in-place clearance: 0.30 to 0.40 mm per side in XY on a 0.4 mm nozzle and two whole layers in Z, with values for hinges, gears, toys and bearings.
3D print snap fit box lid sizes: a 1.35 mm skirt 0.20 to 0.25 mm per side inside the wall and a 0.3 to 0.5 mm catch, plus an ESP32 case and PCB clips.
Every 3D printer calibration formula on one page: e-steps, rotation distance, steps per mm, flow ratio, Vref, belt tension, skew, shrinkage, holes and layers.
3D printer 24V vs 48V: 48 V on the motors holds torque to higher speeds. Heaters, fans and the board stay on 24 V. What you need, what it costs, the math.
What voltage are 3D printer fans? Usually 24 V, matching the printer's supply; older printers use 12 V and some boards 5 V. How to check and fix a mismatch.
What power cord does a 3D printer use? Most take a standard PC cord: NEMA 5-15P plug to IEC C13. Ratings, gauge, and the cords for Ender 3, Bambu Lab and Prusa.
A 3D printer can trip a breaker three ways: overload, ground-fault leakage (GFCI) or an arc-like signal (AFCI). Find which one tripped, then the fix.
Set a 3D printer's voltage switch to 115 V in the US and 230 V only on 200 to 240 V mains. Where the switch is, how to check it, and what a wrong setting does.
ABS shrinks about 0.4 to 0.8% in X and Y as it cools, but one printed-part study saw it grow 0.92% in Z. Figures by source, plus the OrcaSlicer values.
ABS vs ASA shrinkage: about the same. Resin and filament data sheets put both at roughly 0.4 to 0.7%, so start ASA with ABS compensation and measure.
Bambu Lab printer voltage: the A1, A1 mini, P1 and X1 take 100 to 240 VAC; the H2D, H2S, P2S and X2D ship as 110 V or 220 V versions. Amps per model.
Bambu Lab publishes no ABS shrinkage value. Start at 99.36% in Bambu Studio's Shrinkage field, then print a test cube and correct. PLA and PETG values too.
PETG-CF shrinks about 0.3 to 0.6%, against 0.54 to 0.76% for printed plain PETG. The published PLA-CF and ABS-GF figures, and why X and Y can differ.
What voltage do Creality 3D printers use? 100 to 120 V or 200 to 240 V AC in, 24 V DC inside. Ratings, the 115/230 V switch and amps per Ender and K model.
Yes. 3D printed parts shrink as they cool, under 1% in X and Y for PLA, PETG and ABS. After that, only heat, moisture or a constant load changes their size.
Yes. Printed PLA shrinks along its print lines and grows in height once it passes its glass transition, about 55 to 61 °C. Below that it barely moves.
Yes, slightly and reversibly: a 100 mm PLA part loses 0.16 to 0.38 mm going from a 20 °C room to a -18 °C freezer. PETG loses about 0.19 mm.
Does PETG shrink? Yes, by under 1%: 0.54 to 0.76% in X and Y and 0.73% in Z in a printed-part study, close to PLA. Plus the value to enter in each slicer.
Printed PLA shrinks about 0.5% in X and Y and 0.8% in Z. The figures by axis, the molded resin value, and what to enter in OrcaSlicer, Bambu Studio and Prusa.
Yes, 3D printed resin shrinks as it cures: 3 to 6% by volume on maker data sheets, and about 0.3 to 0.6% in X and Y on measured printed parts.
Stepper driver input voltage: A4988 8 to 35 V, DRV8825 8.2 to 45 V, TMC2209 5.5 to 29 V. Why you keep margin, and which drivers run on 24 V or 48 V.
A NEMA 17 stepper is rated about 3 V, which is just rated current times coil resistance. Printers run them on 12 or 24 V through current-limiting drivers.
What voltage should a 3D printer be? In the US, 120 V AC; many printers take 100 to 240 V with nothing to set. How to read the label, plus the 24 V DC inside.
Build a 3D print cost spreadsheet in Excel or Google Sheets: a settings block, one row per job, formulas to paste and a CSV template you can import.
An articulated 3D printed dragon costs about $0.84 to $2.32 in PLA and power at 27 to 55 cm long. Grams, hours and cost by size, plus how to price one to sell.
What a 3D printed figure or toy costs at home: grams, print hours, filament and electricity for figures from 10 to 60 cm, action figures and fidget toys.
A wearable 3D printed helmet costs about $8 to $33 in PLA and power, a mask $2.50 to $10, and a full suit of armor $200 or more, from real model profiles.
How much to charge for 3D printed keychains: what one costs to make, a pricing formula, and what you keep at $4, $6 and $8 after Etsy or Square fees.
A 3D-printed LEGO-compatible 2x4 brick costs about 7 cents in PLA and power, against 21 cents on LEGO's US Pick a Brick. Per brick, per gram and per set.
A 28 to 32 mm miniature costs 10 to 26 cents in resin or PLA. Resin per ml and PLA per gram for real minis, a Warhammer army budget, and what to charge.
What a 3D printed vase costs at home: grams, hours, filament and electricity for vase-mode vases from 13 to 30 cm, solid-wall vases, and what to charge for one.
Can you run a 3D printer on an extension cord? Yes, on a grounded cord rated above the printer's peak amps. Gauge limits, power strip rules and what to avoid.
3D printer power consumption compared: rated maximum watts, measured PLA averages and cost per hour for Bambu Lab, Prusa, Creality, Elegoo and more.
US libraries charge 6 to 20 cents per gram or $1 per hour for 3D printing, and some print free. Fees at eight libraries and a 20 g and 50 g print priced.
What 3D printing services charge for a plastic part: online FDM from $1.00, $25 minimum orders, about $95 at Protolabs, and 15 cents a gram at libraries.
Bambu Lab A1 mini 3D printer power consumption: 80 W average on PLA, 150 W maximum, 6 to 7 W standby, with kWh, cost per hour and amps at 120 V.
Bambu Lab A1 3D printer power consumption: 95 W average on PLA, 350 W maximum at 110 V, 4 to 5 W standby, with kWh and cost per hour at US rates.
Bambu Lab P1S 3D printer power consumption: 105 W average on PLA, 140 W on ABS, 350 W maximum at 110 V, 6 W standby, with kWh and cost per print.
Bambu Lab X1C 3D printer power consumption: 105 W average on PLA, 150 W on ABS, 350 W maximum at 110 V, about 9 W standby, with kWh and cost per print.
Creality K1C 3D printer power consumption: about 144 W averaged over a PLA print, 150 to 250 W spot readings, 350 W rated, with kWh, cost and amps.
Do all 3D printers poop? No. Which printers eject purge through a chute, why they do it even in one color, and how many grams each purge wastes.
Ender 3 3D printer power consumption: 80 to 125 W measured on PLA, 270 W or 350 W rated, a 220 or 270 W heated bed, with kWh and cost per print.
What flushing volume should you use? Bambu Studio and OrcaSlicer values by color pair, black to white and white to black, in mm³ and grams of PLA.
The flushing volume multiplier scales every flush in the slicer's table. Defaults, the 0 to 3 range, grams and dollars saved at 0.8 or 0.7, and how to test it.
3D printer hotend wattage explained: stock heaters are 40 W to 48 W, high-flow ones 50 W to 100 W. Resistance, amps, and what more watts change.
How many amps does a 3D printer use? About 1 to 3 A at 120 V: 0.7 to 1.7 A while printing, up to 2.9 A at a 350 W peak, plus the outlet and circuit it needs.
Is 3D printing expensive? Running a hobby printer costs about $20 to $24 a month for filament, power and wear parts. The printer and the extras cost more.
The multi-color 3D printer with least waste is a tool changer. Waste per color change for switchers, dual nozzles, tool changers and IDEX, worked through.
The flushing volume from PLA to PETG and back: Bambu Studio's measured 650 mm³, why color-based tables run low, grams per change and how to raise it.
How to reduce 3D printing cost, lever by lever: infill, walls, layer height, nozzle size, bulk filament, failures and purge, each with a measured saving.
Running a 3D printer on solar: the inverter size, the battery Wh for a print, and the panel watts to recharge it, with worked examples for an A1 mini and a P1S.
A small 3D print costs 10 cents to $1 at home in PLA and power. Real model weights and print times, service and library minimums, and how to price small prints.
Size a 3D printer uninterruptible power supply by watts, not VA, and work out how many minutes its battery holds a print, with Bambu Lab examples.
How to add a 240V outlet for a 3D printer: panel capacity, breaker and wire size, NEMA 6 receptacles, the 80% load rule and when 240 V beats 120 V.
AC vs DC heated beds explained with the math: current and resistance at 12, 24, 120 and 230 V, heat-up time, PSU sizing, SSRs and where the losses really are.
Calibrate dimensional accuracy per material: fix e-steps and flow, print a test part, measure it, and turn the errors into XY, Z and hole compensation values.
Print dimensionally accurate nylon parts: dry the filament, control chamber and cooling, then compensate for print shrinkage and moisture swelling.
Where multi-color filament waste comes from, a worked cost and time example, the cheaper alternatives, and how to slice and paint a model to cut color changes.
Is AI print failure detection worth it? What camera and lidar monitoring catch, what they miss, 2026 prices, and a break-even formula with worked examples.
How to reduce print failure rate with numbers: log every failure, price each failure mode, fix the costliest first and check each upgrade's payback in prints.