How long does FEP film last?

Standard FEP film typically lasts 150-250 print hours. nFEP (non-stick FEP) and PFA films last 300-500+ hours. Lifespan depends on print area usage, resin type, and how carefully prints are removed from the build plate.

How do I know when FEP needs replacing?

Signs include: visible cloudiness or scratches on the film, prints sticking to the FEP instead of the build plate, increased print failures, and visible dents or warping in the film when viewed at an angle.

What is nFEP and is it worth it?

nFEP is a non-stick variant of FEP film that reduces peel forces, leading to better print reliability and longer film life. It costs roughly 2x standard FEP but lasts 2-3x longer, making it cost-effective for regular printers.

Can I extend FEP life?

Yes: clean the vat thoroughly between resin changes, avoid scratching with metal tools, use plastic scrapers only, check for cured resin stuck to the film, and consider using a screen protector on the LCD to prevent heat-related FEP degradation.

3DPrintCalcs

Vat Life Calculator — FEP Film Replacement Schedule

Estimate how many print hours remain before your FEP film needs replacing.

Print Hours Used

Avg Print Area Coverage

% of build plate used

FEP Type

FEP Sheet Cost

How We Calculate This

FEP Life Estimation

Estimated life = Base FEP life x Area usage factor
Remaining life = Estimated life - Hours used
Cost per hour = FEP cost / Estimated life

Large prints that cover more of the build plate area put more stress on the FEP film per layer peel, reducing its lifespan. Smaller prints that use less area are gentler on the film.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify settings with test prints before committing to final prints.