Epoxy Resin Calculator
Enter your mold or project dimensions, the resin-to-hardener mix ratio, and a waste allowance to get the exact amounts of Part A (resin) and Part B (hardener) to prepare.
Dimension unit
%
Combined resin + hardener volume including waste allowance
1 200 ml
mold volume- 1
Mold volume (cm³)
60 × 40 × 0,5 = 1 200Dimensions converted to centimetres; 1 cm³ = 1 ml. - 2
Waste factor
1 + 10 ÷ 100 = 1,1 - 3
Total epoxy needed
1 200 × 1,1 = 1 320
Ako táto kalkulačka funguje?
Volume = L × W × D. Add your waste allowance, then split by the mix ratio: resin = total × ratio/(ratio+1), hardener = total/(ratio+1). Always use the ratio on your product label, measure by volume, and add 10 % waste buffer to avoid running short mid-pour.
Vzorec
How this is calculated
Epoxy resin is a two-part system: a resin (Part A) and a hardener (Part B) that react when combined in the correct ratio. The mix ratio on the product label (e.g. 2:1 by volume) means 2 parts resin for every 1 part hardener. Getting the ratio wrong causes the epoxy to remain sticky or cure improperly, so measuring accurately is critical. The calculator multiplies the mold dimensions (length × width × depth) to get the net volume in millilitres, then adds a waste allowance for drips, coating the sides and residue left in the mixing cup. This total is then split according to the mix ratio: resin volume = total × ratio ÷ (ratio + 1), hardener volume = total ÷ (ratio + 1).
Dimensions can be entered in centimetres, millimetres or inches; the calculator converts everything to cubic centimetres (1 cm³ = 1 ml) before computing. Results are shown in both millilitres and US fluid ounces (1 fl oz = 29.57 ml). The waste allowance default of 10 % is a reasonable buffer for a first pour; experienced casters often find 5 % sufficient once they have a consistent technique.
This calculator assumes a rectangular (cuboid) mold. For irregularly shaped molds, break the shape into rectangular sections and sum their volumes. Deep pours in a single layer can generate excessive heat; check your resin's maximum recommended pour depth and split very deep pours into multiple thinner layers with cure time between each.
Často kladené otázky
Use the ratio printed on your specific resin product — do not guess. Common ratios are 2:1 (two parts resin to one part hardener), 3:1 and 1:1, always by volume unless the label specifies by weight. Mixing off-ratio prevents proper curing and results in sticky or brittle epoxy that cannot be fixed after it sets.
Some resin is always lost: it coats the mixing cup and stir stick, drips down the sides of the mold, and a small amount is needed to overfill slightly so the surface levels flat. A 10 % allowance is a practical buffer for beginners; reduce it once you have refined your pouring technique.
Epoxy curing generates heat (exothermic reaction). Deep single pours — typically more than 1–2 cm, though limits vary by product — can overheat and crack, yellow or warp. For thick pours, check the manufacturer's maximum single-layer depth and split into multiple thinner layers, allowing each to gel before the next.
Známe aj ako
TG we-Calculate Editorial Team. (2026). Epoxy Resin Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/sk/calculator/epoxy-calculator
TG we-Calculate Editorial Team. "Epoxy Resin Calculator." TG we-Calculate. 2026. https://we-calculate.com/sk/calculator/epoxy-calculator.
TG we-Calculate Editorial Team, "Epoxy Resin Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/sk/calculator/epoxy-calculator
@misc{wecalculate_epoxy_calculator, title = {Epoxy Resin Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/sk/calculator/epoxy-calculator}}, year = {2026}, note = {TG we-Calculate} }
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