How to use the Epoxy Resin Calculator
- Quick Calc: fastest for rectangular/coating areas. Auto-picks the best resin system, waste %, and safe max pour per layer.
- Pro Calc: adds River (with void factor) and Cylinder shapes, independent layer limits, and the same kit suggestions—use when geometry is irregular or you need precise control.
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Choose your project purpose
- Auto-selects the best resin system, sensible waste %, and safe max pour per layer.
- Examples: Surface flood coat → Low Viscosity (2:1). River table → Deep Pour (3:1). Potting → High/Mid Viscosity (2:1).
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Select your units
- mm (most precise), cm, or in. You can switch anytime.
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Confirm resin system (optional)
- Purpose sets this automatically—you can still change to Low/Mid/High (2:1), Deep Pour (3:1), or 1:1 Art Coat.
- Mix ratio boxes update automatically; this calculator works by volume.
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Enter dimensions
- Length × Width × Depth/Coat thickness.
- For irregular “river” voids, use average width (or use the Pro tab’s River shape later).
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Waste allowance (%)
- Adds margin for mixing losses, edge soak, pinholes, and small voids.
- Guidance: Flood coats 8–12%, Deep pours 12–18%, Potting 5–10%.
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Mix ratio (A:B) — by volume
- Pre-filled from the selected system; only change if your label says otherwise.
- Don’t use weight here—resin & hardener densities differ.
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Max pour / layer (mm)
- Used to suggest number of layers and approx thickness per layer.
- Always check the product TDS for safe layer depth & temperature limits.
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Read your results
- Total volume (mL & L) already includes your waste allowance.
- Layers suggested shows passes and ~thickness per layer.
- Mix breakdown gives Part A / Part B volumes (by volume).
- Suggested kits are clickable sizes that cover your need—choose exact or the next size up.
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Save it
- Use Copy summary or Email me my result to keep your numbers.
Resin Calculator
By Resin Shop Australia
Epoxy Resin Calculator
Resin Shop • AU
Quick estimates for beginners + advanced controls for pros. Choose a purpose to auto-pick the best system and defaults.
Quick Calc
Pro Calc
Basics
Sets sensible defaults (system, waste %, pour per layer). You can still change anything.
Results
Total volume: 0 mL (0.000 L)
Includes waste allowance.
Layers suggested: 1 × ~0 mm
Based on max pour / layer. Check TDS.
Mix breakdown (total, by volume):
Part A: 0 mL • Part B: 0 mL
Suggested kits (this system):
Disclaimer: Estimates only. Always check the product TDS for safe layer thickness, pot life, and cure conditions.
Advanced Inputs
Use 0.80–0.90 to allow for timber encroachment & irregular edges.
Results
Total volume: 0 mL (0.000 L)
Includes waste allowance.
Layers suggested: 1 × ~0 mm
Adjust with your TDS guidance.
Mix breakdown (total, by volume):
Part A: 0 mL • Part B: 0 mL
Suggested kits (this system):
© Resin Shop
Important notes & disclaimer
- This tool gives volume estimates. Always follow the product TDS for max pour per layer, pot life, cure times, and temperature limits.
- Mixing is by volume unless your label/TDS explicitly specifies a weight ratio.
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Scope & responsibility
- Results are guidance only and assume typical conditions; final project outcomes remain the user’s responsibility.
- Quick Calc assumes rectangular/coating geometry; Pro shapes refine geometry but are still estimates.
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Pour limits & temperature
- Respect your resin’s max pour per layer and ambient/substrate temperature windows from the TDS.
- Warmer conditions accelerate reaction/exotherm; cooler conditions slow cure and may cause amine blush.
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Waste allowance & irregularities
- Choose a waste % to cover mixing losses, edge soak, pinholes, and unknown voids.
- Porous timber and “river” cavities can consume more resin—add margin if your project is critical.
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Mix basis & ratio accuracy
- Use the correct basis (volume vs weight) and the exact ratio (e.g., 2:1, 3:1, 1:1).
- Measure accurately with graduated containers; never alter ratio to “speed up” or “slow down” cure.
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Deep pour heat management
- Large pours build heat. Use slow-cure systems, respect layer limits, and allow cooling time between layers.
- Increase airflow; avoid enclosed, hot spaces that trap heat.
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Substrate prep & bubbles
- Seal porous surfaces before casting to minimise bubbles and soak-in.
- If using heat guns/torches, keep moving, low, and brief—avoid overheating or scorching.
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Recoats & sanding
- Follow recoat windows. If outside the window, scuff-sand and clean to ensure adhesion.
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Kit suggestions
- Suggested kits combine sizes to cover your required litres. Choose the exact match or the next size up.
- Unopened returns/changes follow our returns policy.
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Safety
- Wear gloves and eye protection; ensure ventilation. A respirator is recommended in poorly ventilated areas.
- Keep out of reach of children and pets. Refer to the product SDS for first-aid information.
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Need help?
- Unsure which system to use? Contact us with your dimensions, substrate, and project goals.