Exact A:B calculation
Respects the exact ratio of each product. No estimates, no unnecessary waste.
Free calculator
Calculate your epoxy resin with exact precision
Enter your piece measurements and get the exact resin amount, A:B breakdown, curing times, and layer pour plan.
Everything you need to not waste a single gram
Layer pour plan
If your piece exceeds 2 cm depth, the calculator automatically splits into safe layers.
Pot life timer
Countdown of working time so it doesn't cure before you finish.
Region detection
Units and purchase recommendations adapted to your country automatically.
Free and no sign-up
No account, no subscription. Open the calculator and start.
Real-time results
Grams recalculate instantly as you enter measurements.
Guides and calculators
Everything you need to get your project right the first time.
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Frequently asked questions
How do I calculate how much epoxy resin I need?
Multiply your piece area (length × width) by depth to get volume in cm³. Multiply that volume by resin density (typically 1.10 g/ml) to get grams. Add 10% waste margin. Our calculator does this automatically and respects the exact A:B ratio of the product you use.
Why should resin be poured in layers?
Epoxy resin generates exothermic heat as it cures. If the layer exceeds 2-3 cm it can overheat, crack, or yellow. Pouring in thin layers allows heat to dissipate properly.
Is the calculator free?
Yes, ResinCalc is 100% free and no sign-up is required. We generate revenue through affiliate links with resin brands, at no extra cost to you.