Print Time Estimator
A rough print-time estimate for before you've sliced a model — once you have an actual sliced file, its estimate will always beat this one.
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How this estimate works
This treats the filament volume as if it were extruded continuously at a fixed rate (line width × layer height × speed), then adds a flat overhead percentage for travel moves, retractions, and acceleration ramps that a raw flow-rate calculation ignores. It's a genuinely rough estimate — a model with lots of small islands, supports, or fine detail will spend far more time on travel moves than this formula accounts for, while a large simple part will come in closer to the raw number.
Why your slicer's number is always better
A slicer calculates time from your model's actual geometry, layer by layer, including every travel move and acceleration curve specific to your machine's motion settings — it isn't guessing. Use this tool before you've built or sliced a model, to get a ballpark for whether an idea is worth pursuing; once you have a sliced file, use its estimate instead.