What the Online G-Code Time Estimator & Cost Calculator Does
The MeshKit G-Code Time Estimator and Unit Costing Ledger parses `.gcode`, `.gco`, and `.g` toolpath files directly inside your browser to calculate exact filament usage in millimeters, meters, and grams, estimate print duration, render a layer-by-layer 2D XY toolpath preview, and generate a commercial quote that accounts for polymer cost, electrical energy, machine maintenance depreciation, failed print scrap rate, and marketplace transaction fees.
Unlike basic calculators that guess filament weight from line counts or rely solely on slicer comments, MeshKit tracks actual extruder axis (`E`) movements across both absolute (`M82`) and relative (`M83`) extrusion modes, handles coordinate system resets (`G92 E0`), and converts imperial (`G20`) and metric (`G21`) units automatically.
How to Use the G-Code Calculator in 4 Steps
- Upload or Drag a `.gcode` File: Click the dropzone above or drag a sliced `.gcode` file from OrcaSlicer, PrusaSlicer, Bambu Studio, or UltiMaker Cura. All parsing runs in a local Web Worker—zero bytes are uploaded.
- Select Material Density & Filament Diameter: Pick your polymer (PLA `1.24 g/cm³`, PETG `1.27 g/cm³`, ABS `1.04 g/cm³`, ASA `1.07 g/cm³`, TPU `1.21 g/cm³`, PC, Nylon, or Custom) and diameter (`1.75 mm`, `2.85 mm`, or `3.00 mm`).
- Verify Machine Power & Overhead Rates: Enter your spool price per kilogram, average printer wattage during printing, local residential electricity rate (`$/kWh`), hourly machine wear reserve, and print failure buffer percentage.
- Choose Your Selling Channel & Markup: Select Etsy, eBay, Whatnot, Shopify, Amazon Handmade, TikTok Shop, Direct Invoice, or a custom fee schedule, then choose a cost multiplier or target net margin percentage.
Worked Calculation Example (Golden Vector C1)
Suppose a sliced bracket uses 48.5 g of 1.75 mm PLA (`$22.00/kg`) and takes 3.7 hours on a 150 W printer with `$0.16/kWh` electricity, `$0.15/hr` machine wear, a `7%` failure buffer, sold on Etsy (`9.5% + $0.45` fee) at a `3.5×` markup:
Energy Cost = (150 W ÷ 1000) × 3.7 h × $0.16/kWh = $0.0888
Wear Cost = 3.7 h × $0.15/h = $0.5550
Unit Cost = ($1.0670 + $0.0888 + $0.5550) × (1 + 0.07) = $1.83
Selling Price = ($1.8306 × 3.5 + $0.45) ÷ (1 − 0.095) = $7.58
Net Profit = $7.58 − $1.83 − ($7.58 × 0.095 + $0.45) = $4.58 (60% Margin)
Technical Limitations
When a G-code file includes a slicer time header (`; estimated printing time` from PrusaSlicer/OrcaSlicer/Bambu or `;TIME:` from Cura), MeshKit uses that exact slicer duration. If the header is stripped, MeshKit computes an estimate from move lengths, feedrates (`F`), and trapezoidal acceleration (`M204`, defaulting to `1500 mm/s²`), which may differ by 5–12% from firmware-specific input-shaping or cornering junction deviation rules.
Frequently Asked Questions
Are my G-code files uploaded to a remote server?
No. Every G-code file is read locally in your browser using the File API and processed inside an isolated Web Worker. Your G-code never leaves your computer.
How does MeshKit calculate filament grams if my G-code has no slicer header?
MeshKit sums every positive and negative `E` movement across all `G0` and `G1` commands (supporting both `M82` absolute and `M83` relative extrusion and `G92` resets) and multiplies the extruded volume by your selected polymer density (`grams = E_mm / 10 × π × (d_cm / 2)² × density`).
Why does the failure buffer apply to material as well as energy and wear?
When a 3D print fails due to bed adhesion loss or filament jam, both the machine time and the extruded polymer are wasted. Applying `(1 + failure%)` to total production cost ensures your break-even floor covers scrap material.
What is the difference between Cost Multiplier mode and Target Margin % mode?
Cost Multiplier multiplies your unit cost by a factor (such as `3.5×`) before grossing up for marketplace fees. Target Margin % solves for the exact selling price where net profit divided by selling price equals your desired percentage after all platform fees.
Can I use this calculator without uploading a G-code file?
Yes. You can type your slicer's gram and hour estimates directly into Section B above, or use our dedicated Manual 3D Print Cost Calculator.