Studios are being pushed to report operational impact with numbers that stand up in procurement and client reviews. This article focuses on the two levers most teams can measure and influence day to day: electricity used during printing and immediate post-processing, and material that cannot be reused. It compares FDM, SLA, SLS and MJF with 2024–2025 guidance and representative measured ranges, then translates those differences into a lightweight calculator that estimates kWh per part and grams of waste per part using a small set of inputs (part mass, print time, average power, support fraction, wash losses, powder refresh rate, handling losses). The piece also gives a consistent method for capturing your own baselines using slicer logs and mains power meters, and a short reduction checklist per process so teams can cut energy draw and waste without changing suppliers or running full LCA studies.

[1] A. Sola, P. F. Fiorentin, and R. Ponticelli, “Environmental impact of fused filament fabrication, a review,” Sustainability, vol. 16, no. 6, 2024, Art. no. 2565. Available, https://pmc.ncbi.nlm.nih.gov/articles/PMC11281121/PMC
‍[2] R. Wichniarek, P. Górski, and M. Kuczko, “Assessing energy efficiency in desktop size FFF 3D printers,” Applied Sciences, vol. 14, no. 24, 2024. Available, https://www.mdpi.com/2076-3417/14/24/11819MDPI
‍[3] Source Graphics, “Formlabs Form 3+, basic package specifications,” 2024. Available, https://sourcegraphics.com/product/formlabs-form-3-basic-package/sourcegraphics.com
‍[4] M. Abbasi, S. A. Abbasi, and M. Mirzaei, “Head to head evaluation of FDM and SLA in additive manufacturing,” Applied Sciences, vol. 15, no. 4, 2025, Art. no. 2245. MDPI
‍[5] HP Inc., “HP 3D high reusability PA 12, technical data,” Sept. 2024. Available, https://rapidnext.eu/wp-content/uploads/2024/09/MJF-PA12-TDS.pdfrapidnext.eu
‍[6] HP Inc., “HP 3D printing materials, overview 4AA7 1533 ENA,” 2024. Available, https://h20195.www2.hp.com/v2/getpdf.aspx/4AA7-1533ENA.pdfHP Support
‍[7] Global3D, “3D printer power consumption, what will my energy bills be,” Mar. 27, 2024. Available, https://global3d.pl/en/blog/3d-printer-power-consumption-what-will-my-energy-bills-be-b124.htmlglobal3d.pl
‍[8] Formlabs, “Disposing of resin,” Support article, Oct. 2024 update. Available, https://support.formlabs.com/s/article/Disposing-of-resinFormlabs Customer Support+1
‍[9] M. Elbadawi, H. Toyserkani, and P. Dickens, “Energy consumption and carbon footprint of 3D printing in pharmaceutical manufacturing,” Journal of Manufacturing Systems, 2023. Notes SLA energy per job and post cure considerations used comparatively with 2025 study. Available, https://discovery.ucl.ac.uk/id/eprint/10169412/1/1-s2.0-S0378517323003460-main.pdfUCL Discovery
‍[10] Cimquest, “Understanding refresh rate in SLS 3D printing,” Oct. 16, 2024. Available, https://cimquest-inc.com/understanding-refresh-rate-in-sls-3d-printing/Cimquest Inc.
‍[11] Solid Print3D, “Formlabs Form 3L, power requirements,” 2024. Available, https://www.solidprint3d.co.uk/shop/3d-printers/formlabs-form-3l/Solid Print3D
‍[12] Sinterit via Top3DShop, “Sinterit SUZY SLS 3D printer, average power consumption,” 2025. Available, https://top3dshop.com/product/sinterit-suzy-sls-3d-printerDigital Manufacturing Store Top 3D Shop
‍[13] Additive X, “Formlabs Fuse 1 plus 30 W, tech and power requirements,” 2024. Available, https://www.javelin-tech.com/3d/formlabs-fuse-1-30w/ and Formlabs tech specs page. Javelin 3D Solutions+1
‍[14] Bechtle AM, “HP Jet Fusion 5000 series, datasheet,” June 2024, notes average power in balanced mode. Available, https://www.bechtle-am.com/wp-content/uploads/sites/4/HP-Jet-Fusion-5000-3D-Printer_Datasheet_June-2024.pdfbechtle-am.com
‍[15] HP Inc., “Jet Fusion 5200 brochure,” 2024, materials reuse notes. Available, https://www.matsuura.co.uk/download/clientfiles/files/HP_JF_5200_Brochure.pdfmatsuura.co.uk
‍[16] TriMech, “Formlabs Form 3+, specifications,” 2024. Available, https://mfg.trimech.com/3d-printer/formlabs-form-3/TriMech Advanced Manufacturing
‍[17] Formlabs, “SLA printers technical specifications, consolidated,” 2025 access. Available, https://formlabs.com/uk/3d-printers/resin/tech-specs/Formlabs
‍[18] HP Inc., “Jet Fusion 5200, automatic unpacking station,” 2024. Available, https://h20195.www2.hp.com/v2/GetDocument.aspx?docname=4AA7-8535ENWHP Support

Studios are under pressure to quantify environmental impact, not narrate it. Additive workflows already cut tooling and transit, yet day to day decisions still hinge on a few practical numbers, grams of waste and kilowatt hours per part. This piece compares FDM, SLA, SLS and MJF using current guidance and measured data, then offers a simple calculator you can drop into job sheets for consistent estimates.

What we compare, and why it matters

Most studio parts are small, irregular and produced in short runs. The biggest levers on footprint at this scale are, one, electricity during printing and immediate post processing, two, material that cannot be re used. Tooling and upstream resin or polymer production also matter, however those are outside routine studio control and vary by supplier. The aim here is operational, give designers and production leads a repeatable way to estimate grams of waste and kWh per part across four processes.

Sources and scope

We rely on 2024 to 2025 publications where possible. For FDM and desktop FFF energy behaviour, recent reviews and experiments show strong parameter sensitivity and practical reduction tactics such as insulating hot ends and using enclosed chambers that reduce power by roughly one fifth to one third, depending on machine and job geometry [1], [2]. For SLA, vendor specifications and new comparative studies report typical printer electrical loads in the low hundreds of watts, with total energy per part often lower than FDM for like for like small objects, once post cure is accounted for [3], [4], [9]. For polymer powder processes, SLS and MJF, powder refresh and reuse define material efficiency. Vendor documentation and integrator guidance in 2024 describe high reusability PA 11 and PA 12 with refresh rates in the 15 to 30 percent range, while smaller SLS units publish average electrical power close to one kilowatt during builds [5], [6], [10], [14]. Where figures vary by platform, we present conservative ranges and note verification required before sign off.

Process snapshots, what influences waste and power

FDM, fused filament deposition

• Waste drivers support material, purge and failed starts. Support share ranges widely with orientation and overhangs. With tuned orientation and minimal supports, waste can approach zero for simple parts.
• Power drivers nozzle and bed temperatures, chamber or enclosure, print time. Desktop measurements cluster between roughly 50 and 150 W while printing, lower after warm up, with higher draw for high bed temperatures [7], [1], [2].
• Practical notes insulating the hot end and enclosing the build volume reduce power draw materially, studies report reductions from about 18 percent to around one third depending on configuration [2].

SLA, resin vat photopolymerisation

• Waste drivers supports, resin clinging to surfaces and wash losses, spent resin that must be cured and disposed. Operator guidance requires fully curing liquid residues before disposal [8].
• Power drivers light engine duty cycle, peel mechanics and post cure. Desktop SLA specifications list around 220 W for printers similar to Form 3+, larger units draw more, and post cure ovens add short bursts of additional energy [3], [11], [16], [17].
• Practical notes SLA often achieves lower energy per small part than FDM at similar volumes in 2025 bench tests, although results vary with geometry and exposure strategy [9].

SLS, laser sintering of PA powders

• Waste drivers aged powder that falls below spec after repeated cycles, sieving losses and any powder that cannot be recoated.
• Reusability refresh is typically expressed as the minimum percentage of virgin powder added to recycled powder before each build. 2024 guidance explains the concept and typical ranges, for example 20 percent refresh implies 80 percent reused powder in the mix [10]. Smaller production systems highlight average build power near 0.85 kW and about 6.8 kWh for an eight hour job at that duty [13].
• Practical notes no support structures are needed, unsintered powder acts as support, so solid waste by part is low when reclaiming flows are well managed.

MJF, multi agent fusion of PA powders

• Waste drivers similar to SLS, dominated by powder management.
• Reusability vendor data for high reusability PA 12 and PA 11 claims industry leading surplus powder reusability with recommended packing and refresh practices, typically in the 15 to 30 percent virgin range depending on quality targets [5], [6], [15].
• Power drivers bed preheat, lamp arrays and thermal control, usually lower peak heat input than laser based SLS for the same build volume according to 2024 technical notes [5].
• Practical notes automatic unpacking and powder reclaim stations reduce manual handling and improve reclaim consistency, which stabilises re use fractions [18].

A simple per part calculator

This is a lightweight method for estimates on job sheets. Replace the input values with your own measurements when available.

Inputs common to all processes

• Part mass, grams, m
• Print time, hours, t
• Average printer power while printing, watts, P
• Post processing power and time if applicable, watts and hours, Pp, tp

Energy per part

• kWh per part equals (P×t)plus(Pp×tp)(P × t) plus (Pp × tp)(P×t)plus(Pp×tp) divided by 1000.

Waste mass per part, FDM

• Choose a support percentage by mass for the job, s. For well oriented parts with modest overhangs, 0.05 is reasonable, for complex geometries 0.15 to 0.30 is common.
• Add a purge and offcut allowance, u, default 0.02.
• Waste g equals m×sm × sm×s plus m×um × um×u.

Waste mass per part, SLA

• Supports by mass, s. Typical ranges 0.10 to 0.35 depending on orientation and raft strategy.
• Wash loss factor, w, to account for resin that remains in cavities and gets removed in IPA, default 0.02 to 0.05 for small parts; cure and dispose per the vendor guidance.
• Waste g equals m×sm × sm×s plus m×wm × wm×w. Note, do not count uncured resin returned to the tank as waste.

Waste mass per part, SLS and MJF

• No geometric supports. Use a refresh rate r for your powder system, fraction of virgin added to recycled for each build, often 0.15 to 0.30 for PA 12 in 2024 guidance [5], [10], [15].
• Assume a sieve and handling loss h, default 0.01 to 0.03 of powder throughput, which becomes solid waste.
• For estimates per part, set throughput_factor k, ratio of total powder moved per part to the part’s final mass. For typical packing densities, use k equals 1.2 to 1.5 as a starting point.
• Virgin feed g equals m×k×rm × k × rm×k×r, this is not waste, it is the new powder required.
• Waste g equals m×k×hm × k × hm×k×h, since the balance of unfused powder is reclaimed for next builds. If your quality plan discards aged powder after a set number of cycles, add that fraction to h for that campaign.

Worked examples, round numbers for a 100 g part

• FDM
  • Inputs, P equals 90 W, t equals 4.0 h, Pp equals 0, tp equals 0, s equals 0.10, u equals 0.02.
  • Energy, (90×4)(90 × 4)(90×4)/1000 equals 0.36 kWh.
  • Waste, (100×0.10)plus(100×0.02)(100 × 0.10) plus (100 × 0.02)(100×0.10)plus(100×0.02) equals 12 g.
• SLA
  • Inputs, P equals 220 W, t equals 3.0 h, post cure Pp equals 60 W, tp equals 0.25 h, s equals 0.25, w equals 0.03.
  • Energy, (220×3)plus(60×0.25)(220 × 3) plus (60 × 0.25)(220×3)plus(60×0.25)/1000 equals 0.69 kWh.
  • Waste, (100×0.25)plus(100×0.03)(100 × 0.25) plus (100 × 0.03)(100×0.25)plus(100×0.03) equals 28 g, all cured before disposal.
• SLS
  • Inputs, average build power equals 0.85 kW, assume your part occupies one tenth of a full eight hour build, so P equals 850 W, t equals 0.8 h attributed to this part, r equals 0.20, h equals 0.02, k equals 1.3.
  • Energy, (850×0.8)(850 × 0.8)(850×0.8)/1000 equals 0.68 kWh.
  • Waste, 100×1.3×0.02100 × 1.3 × 0.02100×1.3×0.02 equals 2.6 g. Virgin feed for planning, 100×1.3×0.20100 × 1.3 × 0.20100×1.3×0.20 equals 26 g.
• MJF
  • Inputs, similar attribution, assume P equals 650 W effective for the share of the build, t equals 0.8 h, r equals 0.15, h equals 0.02, k equals 1.3.
  • Energy, (650×0.8)(650 × 0.8)(650×0.8)/1000 equals 0.52 kWh.
  • Waste, 100×1.3×0.02100 × 1.3 × 0.02100×1.3×0.02 equals 2.6 g. Virgin feed, 100×1.3×0.15100 × 1.3 × 0.15100×1.3×0.15 equals 19.5 g.

How to measure your own P and t

• Record print time from slicer logs or machine telemetry.
• Measure average power with a smart plug or mains power meter over the job duration, include warm up and cool down. Repeat for a typical post cure where relevant.
• For SLS and MJF, allocate build energy across parts by occupied volume or by final mass, pick one rule and document it for consistency.

Practical reduction checklist, immediate actions

• For FDM, enclose the printer where safe, insulate the hot end, lower bed temperatures once adhesion is secure, simplify supports with orientation and breakaway interfaces, recent studies quantify double digit percentage power savings from enclosure and insulation [2].
• For SLA, trim raft sizes and reduce support density where mechanics allow, keep resin handling disciplined so wash losses are minimised, cure all liquid residues before disposal following vendor guidance [8].
• For SLS and MJF, maintain powder refresh logs, set a default refresh rate per material grade and only tighten for critical properties, deploy automated unpacking and sieving where possible to lower handling loss and stabilise reuse [18], [10], [5].

What the numbers say, and where to be cautious

For small, simple parts, FDM can be energy efficient when bed temperatures are low and print times are short, however heavy supports and long durations change the picture quickly. SLA often delivers lower energy per part at small scales in controlled tests, although resin handling introduces non trivial cured waste and careful disposal. SLS and MJF shine on material efficiency when reclaim is tight and refresh is controlled, waste per part can approach a few grams, although energy per part depends strongly on how full and how often you run the machine. Published figures vary with platform and setup, so capture your own baselines, then apply the calculator for more accurate job costing and sustainability reporting. Where this article uses vendor specifications and integrator briefs, verify figures against your equipment before publication.

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