3D printing calculators with the formulas shown
Each calculator runs in your browser and shows the formula it uses, with the source of that formula on the same page: slicer source code for the extrusion cross-section, the Klipper and Marlin documentation for extruder calibration, the OrcaSlicer wiki for its calibration tests, and the manufacturers’ data sheets for density and drying values. Nothing you type is sent anywhere.
The calculators that need material data (flow presets, density, drying) read the same database as the filament tables, so a value only appears where the manufacturer publishes it.
8 calculators
- Max print speed from volumetric flow: the calculator slicers use
Convert a hotend or filament flow limit in mm³/s into the fastest print speed for your layer height and line width, using the slicers' own formula.
- Filament length to weight (and back) from diameter and density
Convert grams of filament to metres and metres to grams for 1.75 or 2.85 mm filament, using densities published in manufacturers' data sheets.
- 3D print cost calculator: filament, electricity and failed prints
Work out what one print costs from the slicer's filament estimate, your spool price, print time, printer power and electricity tariff.
- Extruder calibration calculator: Klipper rotation_distance and Marlin e-steps
Correct Klipper rotation_distance or Marlin E steps/mm from a mark-and-measure extrusion test, and convert between the two settings.
- Shrinkage compensation calculator for OrcaSlicer, PrusaSlicer and plain scaling
Turn a measured test print into the shrinkage value OrcaSlicer or PrusaSlicer expects, or a plain scale factor. The two slicers use opposite conventions.
- Filament drying planner: which spools can share a dryer run
Pick spools from the filament database and get a drying plan: the dryer temperature, run time and end time, using each maker's published drying conditions.
- Flow ratio calculator for OrcaSlicer tests and wall-thickness measurements
Get the new flow ratio from OrcaSlicer's YOLO or 2-pass calibration, or from a single-wall cube measured with calipers, with the arithmetic shown.
- Calibration tower calculator: pressure advance, max flow and temperature towers
Turn the height of the best section on a pressure advance, max flow or temperature tower into the value to enter, with Klipper and OrcaSlicer presets.