Enter fiber mass, matrix mass, constituent densities, and an optional void fraction estimate.

Can this use burn-off data?

Yes. Use post-burn fiber mass and original matrix mass estimates when those are your measured inputs.

Is this a certified composite test?

No. It is a transparent calculation helper for research, coursework, and protocol documentation.

ToolsConductScience tool

CompositesFree in-browser calculator

Fiber Volume Fraction Calculator.

Convert composite mass and density measurements into fiber, matrix, and void volume fractions. For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

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$Illustrated fiber volume fraction calculator cover for materials science calculations$

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Validated2026-05-24

CitableMethods and citation included

Calculator

Results update in place

Try it out

Load example fiber volume data to see the full workflow

Fiber Volume inputs

Fiber mass

Matrix mass

Fiber density

g/cm3

Matrix density

g/cm3

Void fraction

Results

Fiber volume

49 %

Matrix volume

49 %

Void volume

2 %

Total volume

13.605 cm3

Fiber

Matrix

Void

Review notes

Use consistent dry masses and densities; absorbed resin, sizing, or burn-off residue can bias fractions.

Methods note

Computes constituent volumes from mass divided by density, then reports fiber, matrix, and void fractions.

Scope and limitations

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

Results are deterministic calculations from the values entered here. Review units, assumptions, and measurement quality before using outputs in reports or protocols.

Method

Uses the tool-specific formulas and assumptions shown in the calculator output.

Validated

Last validated 2026-05-24. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

Fiber Volume Fraction Calculator (1.2.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/fiber-volume-fraction-calculator

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

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