What's new

A full round of testing turned up a batch of fixes. Empty spool and bottle fields and an empty row waste % now use your Settings defaults, filament no longer counts in Resin mode (and vice versa), and the material totals update as you type. 'Calculate costs' works again. STL import keeps the values you already typed, fills resin in ml instead of grams, and shows a message for a broken file. The PDF now lists your filaments, resins, parts and notes, and uses the same rounding as the live totals. Settings changes only apply after you save them, and you can change the currency without allowing storage.

Maintenance & failures can now be a percentage instead of a fixed amount. The percentage is taken from your material + electricity cost - labor, parts, margin, VAT and shipping are not included. Set it as your default in Settings, or switch between a fixed amount and % for a single estimate with Custom. When you pick a printer template for maintenance, its card now shows the printer's rate per hour.

Picking a saved printer template for Electricity or Maintenance didn't add anything to the price - the calculator quietly used your global default instead. Templates now use the printer's own values: its wattage for electricity, and its maintenance cost per hour times the print time for maintenance. Thanks to the user who reported it!

A big pass across the whole site: fresh look and feel, plus real time-savers - drop in an STL to auto-detect the weight, save your own default rates so you're not retyping them every time, and save printer templates for quick reuse. Every field can switch between your global default, a custom one-off value, or a saved template. Also now fully usable on mobile, with a dedicated Contact page and an opt-in prompt before anything is saved locally.

A round of behind-the-scenes work to make the site faster and steadier.

Cleaned up a few issues that slipped in after the recent redesign.

Redesigned the whole site for a smoother, more intuitive experience. You can now include multiple filaments or resins in one calculation and add your own logo to the generated PDF.

If the tool saves you time, you can now leave an optional donation.

Pick between a light and a dark theme - your choice is remembered.

Shipping was missing from the total; now corrected and shown as its own line in the overview, alongside some styling polish.

The breakdown overview was getting messy, so it got a cleaner layout that is easier to read.

Added VAT to calculations. Shipping was wrongly folded into the margin calculation - it's now applied after the total, with margin.

The calculator now supports both filament and resin prints with the same accuracy. 'Used filament' also moved from Basic to the Material section.

The margin percentage used for each part now shows in the overview.

Include purchased parts in a calculation for more flexibility and accuracy when estimating costs.

Launch of this changelog page.