Epoxy Resin Volume Calculator

Estimate resin volume and Part A/Part B amounts for shallow pours.

Useful for resin artists, tray makers, coaster makers, woodworkers, and craft-market production.

Free calculator Defaults are prefilled so the estimate appears immediately.

Your Estimate

14.63 fl oz with 10% extra

Total resin 14.63 fl oz with 10% extra

Part A 7.31 fl oz

Part B 7.31 fl oz

Formula Used

base volume = length x width x depth, or pi x radius squared x depth; planning volume = base volume x (1 + waste allowance); split planning volume by mix ratio

This estimate covers simple rectangular or circular pours and splits the planning volume by the selected ratio. It does not account for displaced objects, porous surfaces, leaks, product maximum pour depth, or whether your product ratio is specified by weight instead of volume.

Editable Assumptions

These defaults are starting points. Use the linked inputs to replace them with values for your materials and process.

Mix ratio by volume — default 1:1: The 1:1 default is only a starting preset. Select the exact resin-to-hardener ratio printed on your product, and do not use a volume ratio when its instructions specify weight.
Extra allowance — default 10%: The 10% default allows for mixing-cup residue and small measurement variation. Reduce it for tightly measured molds or increase it for porous surfaces and uncertain geometry.

Fixed conversions and presets

Fluid ounces per cubic inch (0.554113): Converts simple resin pour volume from cubic inches into US fluid ounces.

Use in batch cost

Selling your resin pieces?

Resin volume tells you what a pour uses, not what a piece earns. The free Craft Fair Profit Starter Sheet turns it into unit cost, booth expenses, and a break-even sales target.

Product cost worksheet for materials, labor, packaging, overhead, and waste

Event expense checklist that totals only the costs you mark as planned

Break-even and profit-goal sales targets calculated from your own numbers

What is epoxy resin volume calculator?

An epoxy resin calculator estimates pour volume and splits the result into resin and hardener based on the product mix ratio. The result is a planning estimate for simple rectangular or round shapes.

How to use this calculator

Choose the closest shape.
Enter dimensions and pour depth.
Select the mix ratio printed on your resin kit and edit the extra allowance for your project.
Measure parts carefully using the method recommended by the manufacturer.

How is it calculated?

Formula

base volume = length x width x depth, or pi x radius squared x depth; planning volume = base volume x (1 + waste allowance); split planning volume by mix ratio

What The Constants Mean

Fluid ounces per cubic inch (0.554113): Converts simple resin pour volume from cubic inches into US fluid ounces.

A 12 x 8 x 0.25 in rectangular pour needs about 13.3 fl oz before allowance and 14.63 fl oz with the default 10% extra.

Common mistakes

Mix ratios are product-specific and may be by volume or weight. Deep pours, porous surfaces, embedded objects, leaks, and uneven molds can change material needs and safety requirements.

FAQ

Is resin mix ratio by weight or volume?

It depends on the product. Follow your resin manufacturer's instructions.

Can I pour any depth?

No. Each resin has maximum pour depth and heat limits.

Why is 10% extra the default?

It is a visible, editable planning allowance for mixing cup residue and small measurement errors, not a product requirement.

Do I need PPE?

Yes. Use the PPE and ventilation specified by the product SDS and label.

Sources

Last reviewed: August 2, 2026

Found an outdated source, unclear default, or incorrect result? Send a correction with this page and the inputs you used.