Infill Calculator

Compare infill patterns and percentages to estimate strength, weight, material usage, and print time for your 3D prints.

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How It Works

This calculator estimates how infill percentage and pattern affect the weight, material usage, cost, and print time of a 3D printed part.

Material Usage

The infill volume is the interior region of the model. The amount of filament used depends on the infill percentage:

• Infill volume = model volume × (infill percentage / 100)
• Infill weight = infill volume × filament density
• Each pattern has a density modifier that accounts for the actual material laid down relative to a theoretical solid fill

Print Time

Print time scales with infill percentage but is also affected by the pattern complexity. Patterns with more direction changes (like honeycomb) take longer per unit of material than simple patterns (like lines).

Strength Characteristics

Different infill patterns provide different mechanical properties:

• Grid — Good all-around strength, fast to print. Strong along X and Y axes.
• Lines — Fastest to print, weakest pattern. Only strong in one direction.
• Triangles — Excellent lateral strength. Good for parts under shear stress.
• Honeycomb — Best strength-to-weight ratio. Strong in all directions but slower to print.
• Gyroid — Equal strength in all directions (isotropic). Great for flexible or load-bearing parts.
• Cubic — Good 3D strength, balanced in all axes. Moderate print speed.
• Concentric — Follows part outline. Best for flexible parts, weak for rigid loads.
• Lightning — Minimal material, supports top surfaces only. Fastest but weakest overall.

Recommended Infill by Use Case

• Decorative / display models: 5–15%
• General purpose: 15–25%
• Functional parts: 25–50%
• Structural / load-bearing: 50–100%

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