Why "32mm" rarely means 32mm
If you've been 3D printing tabletop miniatures for more than a week, you've experienced the frustration. You download an incredible STL, slice it, hit print, and 8 hours later discover your new character towers over your current squad—or looks like a child standing next to your terrain.
I call it scale creep — because that's exactly what happens to my army when one sculptor measures to the eye and another measures to the crown. I've learned the hard way that no two creators agree on what "32mm" actually means. Some account for base thickness, others don't. For anyone trying to build a cohesive army or gaming table, it leads to a pile of failed prints and wasted filament.
I threw away enough mis-scaled models to get sick of the guesswork. So I broke out my PARKSIDE digital calipers and started working out the actual math.
A reliable baseline for every print
While "28mm" or "heroic scale" can mean whatever a sculptor wants it to mean, scale ratios like 1:56 are exact math. To fix the guesswork across different STL creators, I built these tools around a standard reference.
I use a 175cm human baseline as a consistent starting point. Different sculptors and game systems use different standards, but grounding every conversion on this baseline gives us a reliable bridge. Even if your preferred system measures slightly differently, the percentage ratio between scales stays mathematically solid.
Eye level (160cm)
The standard for fantasy and sci-fi miniatures (modern heroic scale). Measures directly to eye level so helmets, hats, and spikes don't mess up the scale ratio.
Top of head (175cm)
Common for historical wargaming, military kits, and display busts where exact proportion from boots to crown matters.
Why this works
Consistency is what prevents wasted print time. Converting a 28mm STL to 32mm takes a 114.3% scale factor in your slicer. By keeping the baseline fixed, every model you scale using STLACCESS maintains the same proportions across your entire army.
Tested on the build plate
Math on a screen is fine, but table-ready results are what actually matter. I validate scale calculations by printing test pieces and measuring them with a PARKSIDE digital caliper — all-metal construction, 0.01mm resolution, 0–150mm range. Best bang-for-buck measuring tool I have found for the hobby. Here is how real-world printing affects the numbers:
FDM Calibration
Slight over-extrusion can expand dimensions by 0.3% to 0.5%. Keeping flow rate tuned is essential before measuring physical minis.
Layer Stepping
Printing at 0.08mm vs 0.2mm layer heights changes surface stepping, which can subtly shift crown-height caliper readings on rounded helmets.
Material Shrinkage
PLA and PETG shrink roughly 0.2% to 0.5% as they cool. I include material compensation options in the tools to counteract this.
My worst mistake? I once eyeballed 115% for a 28mm→32mm conversion because "it looked close enough." My armoured soldier came out looking like a bobblehead — correct height, wrong proportions. That's why I now measure every conversion with my PARKSIDE calipers before I publish the percentage.
I test every conversion on my Bambu Lab A1 Mini — mostly PLA and PETG. If a converted proxy comes off the build plate looking out of proportion with the rest of my unit, I adjust the numbers before they go live. I don't publish percentages I haven't personally verified.
From print service stress to hobbyist builder
I started 3D printing back in 2017 with a cheap entry-level FDM printer. Like a lot of people back then, I spent more time troubleshooting bed leveling, extrusion issues, and failed prints than actually printing models for the table.
In 2019, I tried turning the hobby into a business by running a 3D printing service in Enschede, Netherlands. It didn't take long to realize that running a commercial print service completely drained the fun out of the hobby. The margins were tight, managing print queues felt like a grind, and I had no time left to print or paint minis for myself. Eventually, I shut down the service and stepped away.
When I returned to 3D printing, I kept it strictly about the hobby. Now I print on a Bambu Lab A1 Mini—mostly PLA and PETG—focusing on sci-fi and fantasy miniature proxies, tabletop terrain, board game upgrades, and the occasional practical print. Zero commercial pressure, just enjoying the process.
Running that print service taught me one key lesson: nobody wants to commit to a 10-hour print only to find out the model is scaled wrong. I built STLACCESS to solve the exact scaling headaches I kept hitting on my own workbench.
What STLACCESS is (and isn't)
Built for the painting desk. I don't sell STL files, spools of filament, or printers. There are no paywalls or affiliate tricks. I built these calculators for my own workflow and published them so other tabletop printers can save time and filament.
Grounded in real printing experience. The numbers aren't just theoretical math. They are tested with physical test prints, measured with my PARKSIDE digital calipers (0.01mm precision), and adjusted when real-world results don't look tabletop-ready.
Driven by community input. New tabletop systems and STL sculptors appear constantly. If a conversion percentage looks slightly off for your army on the build plate, let me know. I regularly test feedback and update the scale library.
By the numbers
46+
Scale conversions
5
Free browser tools
3
Material profiles