Composites, Fiberglass & Advanced Materials calculator

Resin Infusion Time Calculator

Use this calculator to plan how long resin needs to flow through a dry fiber preform based on resin volume, flow rate, and practical setup allowances.

What this calculator does

  • Estimate infusion fill time for vacuum infusion, VARTM, or resin transfer molding.
  • planning infusion window and operator coverage
  • The result estimates infusion process time after normal setup and monitoring allowance.

Formula used

  • Base resin infusion time = resin volume to infuse ÷ stable resin flow rate
  • Estimated resin infusion time = base time × (1 + infusion setup and monitoring allowance)

Inputs explained

  • resin volume to infuse: Use required mixed resin volume including feed lines, runner losses, laminate uptake, and expected waste.
  • stable resin flow rate: Use measured flow under the same vacuum level, resin viscosity, temperature, flow media, and inlet strategy.
  • infusion setup and monitoring allowance: Include line setup, vacuum checks, resin degassing, clamp changes, exotherm monitoring, and documentation.

How to use the result

  • Use it to confirm pot life, operator coverage, and whether the infusion can finish before resin gel or shift end.
  • Treat the result as a planning estimate until it is checked against the approved laminate schedule, material datasheets, ply books, resin batch records, tool condition, cure logs, inspection results, customer specification, and actual shop observations for the same part family and process.

Common questions

  • What is the resin infusion time calculator for? Use this calculator to plan how long resin needs to flow through a dry fiber preform based on resin volume, flow rate, and practical setup allowances.
  • What information should I enter? Enter resin volume to infuse, stable resin flow rate, and a realistic allowance for setup, staging, bagging, inspection, operator movement, and process delays.
  • What does the result tell me? The result estimates infusion process time after normal setup and monitoring allowance.
  • When is the result only an estimate? Treat the result as a planning estimate until it is checked against the approved laminate schedule, material datasheets, ply books, resin batch records, tool condition, cure logs, inspection results, customer specification, and actual shop observations for the same part family and process.

Last reviewed 2026-05-12.