Print time depends on five things: the size of the object, the layer height, the print speed, the infill percentage, and the number of walls. That’s the complete list. Understanding how each one affects time gives you real control over the speed-quality trade-off for every print you run. This guide breaks down all five, includes real print time examples on modern machines, and shows how to schedule multi-part builds intelligently.
Real Print Times for Common Objects
All times measured at 0.2mm layer height, 15% gyroid infill, 3 walls on a Bambu Lab A1 at standard quality profile vs a baseline 60mm/s printer:
| Object | Approx. Size | Bambu Lab A1 | 60mm/s Printer |
|---|---|---|---|
| Calibration cube | 20x20x20mm | ~18 min | ~45 min |
| Phone stand | 100x80x60mm | 1.5-2.5 hrs | 4-7 hrs |
| MTG deck box body | 100x75x40mm | 2-3 hrs | 5-9 hrs |
| Dollhouse railing set (full) | 200x150x30mm (multi) | 3-5 hrs total | 8-14 hrs total |
| Cosplay helmet section | 250x200x80mm | 5-9 hrs | 14-22 hrs |
| Full Commander deck box set | Body + cap + lid | 4-6 hrs total | 12-18 hrs total |
| 1:12 dollhouse refrigerator | 55x45x110mm | 4-6 hrs | 11-16 hrs |
Printer Speed Comparison: What Modern vs Older Machines Actually Mean
| Printer | Practical Print Speed | Relative Print Time (vs Bambu A1) |
|---|---|---|
| Bambu Lab A1 / A1 Mini | 250-350mm/s practical outer wall | 1.0x (baseline) |
| Bambu Lab P2S / H2S | 250-400mm/s practical | 0.9-1.0x (similar) |
| Creality K2 Plus | 200-300mm/s practical | ~1.1-1.2x |
| Prusa MK4S | 100-150mm/s practical quality | ~2.0-2.5x |
| Creality Ender 3 Pro | 50-80mm/s reliable | ~4-5x |
| Any printer with 0.6mm nozzle | Same travel speed, 2x material per move | ~0.4-0.5x (half the time) |
The speed gap is real and it’s not small. A print that takes 2 hours on a Bambu Lab A1 takes 8-10 hours on an Ender 3. Across a full cosplay build or a large dollhouse project, this difference is 40-60 hours of accumulated print time per build. The machine speed premium pays for itself in a few serious builds.
The Five Variables That Control Print Time
1. Object size. Bigger objects take longer. Twice the volume takes roughly twice the time at equivalent settings. Height is the single most impactful dimension because it multiplies by every other variable.
2. Layer height. The most powerful single lever. Halving your layer height roughly doubles print time. 0.12mm takes ~65% longer than 0.2mm. 0.28mm takes ~25% less time than 0.2mm. Use 0.12mm only where fine detail specifically justifies the time cost. See the layer height guide.
3. Print speed. The difference between a modern printer and a baseline machine is 3-5x print time for equivalent quality. Slowing down your profile rarely fixes quality issues; diagnose the actual problem before reaching for the speed slider.
4. Infill percentage. Going from 10% to 40% infill on a deck-box-sized object adds roughly 50-70% more print time. Going from 15% to 20% adds about 10%. The time cost of high infill is real and rarely necessary. See the infill guide.
5. Wall count and surface layers. Going from 2 walls to 4 walls adds 20-35% to print time on hollow or low-infill objects. More walls = stronger print but more time. Top and bottom surface layer count also compounds on flat large prints.
How a 0.6mm Nozzle Changes Everything
The single fastest legal modification for an FDM printer is a larger nozzle. A 0.6mm nozzle deposits roughly 2.25x the material per move compared to a standard 0.4mm nozzle. For objects where fine detail isn’t the priority, this translates to roughly 50% time reduction.
What changes with a 0.6mm nozzle:
- Print time reduced by approximately 40-55% for most objects
- Minimum feature size increases from 0.4mm to 0.6mm (small details may not resolve)
- Layer height can increase to a maximum of 0.48mm (75% of nozzle diameter)
- Wall strength often increases due to thicker perimeter lines
When to use 0.6mm nozzle: Large cosplay prop body sections. Architectural-scale furniture. Any large object without fine surface detail. Structural functional parts.
When to stay on 0.4mm: Logo caps, detail pieces, anything where small feature resolution matters. The OreKo deck box body prints fast on 0.6mm. The logo cap with fine engraving needs 0.4mm.
Planning a Multi-Part Build: Realistic Scheduling
Projects with multiple parts require scheduling. Here’s how to approach a typical build like a full Commander deck box set (box body, logo cap, lid) or a multi-section cosplay prop.
Step 1: Slice all parts first. Get the slicer time estimates for every piece before you start printing. Total them up. This is your minimum machine time budget, not counting failures.
Step 2: Build in a 15-20% buffer. Something will fail or need a reprint. Plan for it.
Step 3: Stack overnight prints. Use the printer’s overnight window (8-10 hours of unattended printing) for your largest single pieces. Schedule 2-hour pieces during waking hours when you can watch the first layer. This approach processes 2-3x more total build volume per calendar day.
Step 4: Batch small pieces. Identical small pieces (deck box caps, cosplay link sets, dollhouse furniture pieces) can often be arranged in groups on the build plate. Printing 4 deck box caps at once takes only slightly longer than 1 because the print head covers the plate rather than making 4 separate trips.
Realistic daily throughput on a Bambu Lab A1:
- ~20-24 machine hours available per 24-hour day
- A serious cosplay prop build uses 40-80 hours of machine time
- That’s 2-4 days of continuous printing for a full armor set
- Add 2-4 days for finishing and assembly
- Total wall-clock time: 4-8 days for a complete armor build
How to Reduce Print Time Without Sacrificing Quality
Focused optimization: attack the variables with the most time cost and least quality impact.
Increase layer height on non-detail surfaces. A deck box body at 0.28mm prints 25-30% faster than at 0.2mm with barely noticeable difference on flat walls. Use fine settings (0.12mm) only where the model has detail that justifies it.
Reduce infill to 10-15% on display pieces. Objects that aren’t load-bearing don’t need more. 10% gyroid is structurally adequate for most hobby prints and cuts time meaningfully.
Use lightning infill for purely decorative prints. Figurines, display-only models, and visual props benefit from lightning infill, which generates just enough structure to hold top surfaces without building a full lattice interior.
Switch to a 0.6mm nozzle for large structural pieces. Cosplay prop body sections, large architectural pieces, and thick-walled functional parts are all excellent 0.6mm candidates. Keep the 0.4mm nozzle for detail pieces.
Batch plate loads. Multiple small identical pieces printed simultaneously reduce per-piece time significantly because travel moves between pieces at the same height are fast.
Frequently Asked Questions: How Long Does 3D Printing Take?
How long does a typical 3D print take?
Small objects (phone stand, small figurine) on a modern printer: 1-3 hours. Medium objects (deck box, functional bracket): 2-5 hours. Large objects (cosplay helmet section, large display model): 6-20+ hours. These assume 0.2mm layer height and a machine running at modern speeds. On an older 60mm/s printer, multiply by 3-5x.
Why does my Bambu Lab printer show such short print times?
Bambu Lab machines run at 250-500mm/s practical print speeds with fast acceleration and deceleration. This is genuinely 3-5x faster than older machines like the Ender 3. The time estimates are accurate. A print that takes 2 hours on the Bambu A1 takes 8-10 hours on an Ender 3 at equivalent quality settings.
How does layer height affect print time?
Halving your layer height roughly doubles print time. Going from 0.2mm to 0.1mm means twice as many passes to build the same height. Going from 0.2mm to 0.3mm cuts roughly a third off the time. Layer height is the most effective single lever for controlling the speed-quality trade-off. The full analysis is in the layer height guide.
Is it safe to leave a 3D printer running overnight?
With proper precautions, yes. Modern printers from reputable manufacturers (Bambu Lab, Prusa) are designed for unattended operation. Don’t leave a printer running in an enclosed room with no smoke alarm. Don’t print on a machine with known electrical issues. Bambu Lab P2S and H2D include AI failure detection that stops the print if it detects a failure. Most experienced makers run overnight prints routinely.
How much does infill affect print time?
Significantly at high infill percentages, minimally at low ones. Going from 10% to 20% infill adds roughly 10-15% print time on a typical object. Going from 20% to 40% adds another 20-30%. For most hobby prints, 15% infill is the time-efficient sweet spot. More at the infill guide.
How long does it take to print a complete cosplay armor set?
For a full armor set (breastplate, pauldrons, gauntlets, greaves) on a Bambu Lab A1: 40-80 hours of total machine time depending on scale and detail. At 20-22 hours of usable printing per day (including overnight), that’s 2-4 days of continuous printing followed by 2-4 days of finishing and assembly. Start at least a week before your convention for a complete armor build.
Does a larger nozzle actually save that much time?
Yes. A 0.6mm nozzle deposits roughly 2.25x the material per move as a 0.4mm nozzle. For large objects without fine detail requirements, this translates to approximately 40-55% time reduction. The detail trade-off is real (minimum feature size increases from 0.4mm to 0.6mm), but for structural body sections, a 0.6mm nozzle is one of the most effective speed upgrades available.
