How do you calculate fiber cost per foot in pultrusion?

Multiply the linear feet pulled by the roving/mat cost per foot and your fiber utilization factor, then add the creel setup and waste allowance, and divide by the feet pulled. With 100 ft at $45/ft, 80% utilization and $250 setup you get $3,850 total, or $38.50 per foot.

What is a good fiber cost per foot for a pultruded profile?

It depends entirely on cross-section and reinforcement. A small E-glass rod may run under a dollar a foot, while a large structural I-beam with carbon can exceed $40/ft. The metric matters most as a trend: watch it move as roving prices and utilization change.

Why is fiber utilization below 100%?

Startup pulls, die purging, tension breaks, and creel changeovers all consume roving that never reaches a saleable profile. An 80% factor means one dollar in five spent on fiber is effectively scrap or process loss.

How does roving cost per foot differ from cost per pound?

Suppliers price roving per pound or per kg, so you must convert using the profile's fiber weight per foot (grams/ft) before it becomes a per-foot number. This calculator assumes you have already made that conversion.

Fiber cost vs. resin cost — which dominates a pultrusion?

In most standard fiberglass profiles fiber is the larger line, but high-fill resin systems or expensive additives can narrow the gap. Run both per-foot figures side by side before finalizing a quote.

Does this include the surfacing veil and mat?

Only if you roll their cost into the blended per-foot rate. The $45/ft in the example is meant to be your full reinforcement package cost, veil and mat included.

Pultrusion & Continuous Composite Profiles calculator

Fiber Cost Per Foot Calculator

Fiber Cost Per Foot tells a pultrusion line what the glass or carbon reinforcement actually costs for every linear foot of profile it pulls. Estimators and plant managers use it because fiber is usually the single largest material line in a pultruded profile — often 50 to 70 percent of raw material spend on a standard fiberglass shape. Getting this number right is what separates a quote that wins margin from one that quietly loses money on every reel of roving consumed. Because pultrusion runs continuously, small per-foot errors compound across thousands of feet in a single shift.

What this calculator does

Fiber Cost Per Foot tells a pultrusion line what the glass or carbon reinforcement actually costs for every linear foot of profile it pulls.
Use it when fiber cost per foot in pultrusion and continuous composite profiles is being put through a pultrusion and continuous composite profiles weighted-cost review.
It computes the total fiber cost for a production run and the resulting cost per linear foot, weighted by how much of the fiber you buy actually ends up in the finished profile.

Formula used

Fiber Cost Per Foot cost = quantity × rate × capture factor + fixed cost
Per-unit fiber cost per foot = total cost ÷ quantity

Inputs explained

Linear feet of profile pulled:
Roving and mat cost per foot:
Fiber utilization (net of scrap):
Creel setup and waste allowance:

How to use the result

Use it when quoting a new profile, revalidating a job after a roving price change, or comparing an E-glass versus ECR-glass or carbon reinforcement package.
It treats fiber utilization as a single blended factor; it does not separately account for reinforcement architecture differences (rovings vs. continuous strand mat vs. surfacing veil), which carry different unit costs and waste rates.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.

Common questions

How do you calculate fiber cost per foot in pultrusion? Multiply the linear feet pulled by the roving/mat cost per foot and your fiber utilization factor, then add the creel setup and waste allowance, and divide by the feet pulled. With 100 ft at $45/ft, 80% utilization and $250 setup you get $3,850 total, or $38.50 per foot.
What is a good fiber cost per foot for a pultruded profile? It depends entirely on cross-section and reinforcement. A small E-glass rod may run under a dollar a foot, while a large structural I-beam with carbon can exceed $40/ft. The metric matters most as a trend: watch it move as roving prices and utilization change.
Why is fiber utilization below 100%? Startup pulls, die purging, tension breaks, and creel changeovers all consume roving that never reaches a saleable profile. An 80% factor means one dollar in five spent on fiber is effectively scrap or process loss.
How does roving cost per foot differ from cost per pound? Suppliers price roving per pound or per kg, so you must convert using the profile's fiber weight per foot (grams/ft) before it becomes a per-foot number. This calculator assumes you have already made that conversion.
Fiber cost vs. resin cost — which dominates a pultrusion? In most standard fiberglass profiles fiber is the larger line, but high-fill resin systems or expensive additives can narrow the gap. Run both per-foot figures side by side before finalizing a quote.

Last reviewed 2026-05-12.