Primer Calculator — Surface Prep Quantities
Estimate primer quantity based on model surface area and application method.
How We Calculate This
Primer coverage varies by method: spray cans use about 0.02ml/cm², airbrush about 0.015ml/cm², and brush about 0.018ml/cm². One coat is usually sufficient for primer.
Frequently Asked Questions
Related Calculators
Paint Mix Calculator
Mix two or more paint colours by ratio to get the exact shade you need.
Thinning Ratio Calculator
Calculate the correct paint-to-thinner ratio for brush, airbrush or spray can.
Airbrush Pressure Calculator
Find the recommended PSI setting for your paint type, nozzle size and technique.
Spray Coverage Calculator
Estimate how much spray paint or primer you need for your model surface area.
Wash Mix Calculator
Calculate the paint-to-medium ratio for panel line washes and pin washes.
Last updated: February 2026
All calculations are estimates. Always verify quantities before purchasing materials.