Primer Calculator

Pick your surface, color change, and condition to get a practical primer recommendation and estimate.

What you get

Your results will show whether primer is likely needed, what type fits your surface, and how much to plan for.

How this primer calculator works

This tool helps you decide whether primer is recommended based on your surface type, condition, and color change. It also estimates how much primer you may need for your project.

When primer is usually needed

If you're not sure how much paint you need, use the paint calculator first, then come back here to confirm primer requirements.

Tips for better primer results

You can also estimate your total project cost using the cost estimator or plan your timeline with the time estimator.

Primer calculator FAQs

Do I always need primer before painting?

No, but it is usually recommended on drywall, bare wood, laminate, glossy surfaces, stained areas, and major color changes.

How much primer do I need?

A gallon typically covers around 250 to 300 square feet depending on the surface and product.

What primer should I use on laminate?

A bonding primer designed for slick surfaces is the safest choice.

Related tools