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CoatCAL
Calculate STEP/STL surface area instantly in your browser
Calculate surface area and overall dimensions from STL and single-body STEP/STP files directly in your browser. Files are processed locally — no upload, account, or CAD installation required. Includes a 3D preview, bounding box, unit conversion, and support for files up to 500 MB.
CoatCAL started from a real task at work.
I was asked to download STEP files, measure their surface area, convert the result to m², and use that for coating calculations in our coating shop.
Doing that repeatedly in CAD felt unnecessarily slow, so I started building a browser tool that could do it in a few seconds.
CoatCAL currently supports STL and single-body STEP/STP files up to 500 MB, with surface area, X/Y/Z dimensions and a 3D preview — all processed locally in the browser.
I’ve validated the STEP calculations against Creo, but now I want real-world testing.
Please try to break it 😄
If you have a weird, large or messy CAD file, throw it at CoatCAL and tell me what happens
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About CoatCAL on Product Hunt
“Calculate STEP/STL surface area instantly in your browser”
CoatCAL was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #361 on the daily leaderboard. Calculate surface area and overall dimensions from STL and single-body STEP/STP files directly in your browser. Files are processed locally — no upload, account, or CAD installation required. Includes a 3D preview, bounding box, unit conversion, and support for files up to 500 MB.
CoatCAL was featured in Design Tools (263.5k followers), Productivity (663.6k followers) and 3D Modeling (2.1k followers) on Product Hunt. Together, these topics include over 217.9k products, making this a competitive space to launch in.
Who hunted CoatCAL?
CoatCAL was hunted by Patrick Kraus. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Patrick Kraus