Epoxy Resin Calculator
Calculate mixed epoxy gallons and exact resin/hardener split by area, thickness (mils), and mix ratio.
- 1.25 gallons total mixed epoxy coating (10 mils thickness, 2 gal buy)
- • Part A (Resin): 0.625 gallons
- • Part B (Hardener): 0.625 gallons (1:1 mix ratio)
Standard Project Worked Example (No JavaScript Required)
Baseline Scenario: 200 sq ft at 10 mils thickness (standard coverage 160 ft²/gal, 1:1 mix ratio, 0% waste): 1.25 gal mixed = 0.625 gal resin + 0.625 gal hardener. With 10% waste: 1.38 gal mixed = 0.69 gal resin + 0.69 gal hardener.
Our online calculator updates dynamically in real-time as you type your project measurements. If JavaScript is disabled, use the formula reference below.
How This is Calculated
Mixed Gallons = Area (sq ft) / Coverage Rate (160 sq ft/gal at 10 mils) × (Thickness / 10) × (1 + Waste% / 100). Resin Gallons = Mixed Gallons × (Resin Parts / Total Parts). Hardener Gallons = Mixed Gallons × (Hardener Parts / Total Parts).
Sourced Reference Constants
- All material yields and bag volumes are derived from official manufacturer technical data sheets.
- Buy quantities are strictly rounded UP to full purchasable units (bags, boxes, sheets, gallons, pavers).
- Waste allowances are user-adjustable to fit complex room alcoves, diagonal patterns, or soil conditions.
Frequently Asked Questions
What is the standard coverage rate for 100% solids epoxy?
At 10 mils (0.010 in) dry film thickness, 100% solids epoxy theoretical coverage is 160 square feet per gallon (derived from 1,604 sq ft·mil/gal ÷ 10 mils ≈ 160 sq ft/gal).
What are common epoxy mix ratios?
Commercial epoxy kits typically use a 1:1, 2:1, or 3:1 ratio (parts resin to parts hardener by volume).
How thick should garage floor epoxy coating be applied?
Residential garage floors are typically coated between 10 and 20 mils total thickness across primer, body, and clear topcoat layers.