STL Scale Converter
The main STL scale calculator I use before every print. Select source and target scales, choose eye-level or top-of-head, and get the exact slicer percentage for every tabletop scale, from 6mm epic to 32mm heroic and beyond.
Calculators
Slicer Percentage Calculator
Type in two measurements in millimetres, get the exact percentage for your slicer. Works for any scale combination.
- Any source size to any target size
- Real-time calculation as you type
- 12 common conversion presets
- Formula breakdown for verification
- Copy result to clipboard
- Zero bloat — no account, no cookies
Filament Cost Calculator
Know your print cost before you start. Enter filament price, weight used, and optional electricity to estimate the true cost of 3D printing miniatures.
- Real-time cost calculation
- Filament cost per print
- Optional electricity cost estimate
- Filament presets with real market prices
- Deep-link from scale engine
- No account, no cookies
Reference Data
Built for miniature 3D printing
Every tool on STLACCESS is built around one problem I kept running into: getting the right scale for 3D printed tabletop miniatures. The calculator and reference library work together so you can convert and share scale percentages — all from your browser, all for free.
- STL Scale Engine — The main calculator for converting between any supported scales
- Miniature Size Chart — 46 verified conversion percentages with print-tested results