Free epoxy volume calculator: enter length, width, and depth in inches or cm to see how much resin to pour in ounces, gallons, or liters, with waste and cost.
Epoxy Unit Converter
Use this page when the number is already known but the unit is getting in the way. It is designed for real epoxy planning, where one source might show gallons, another liters, and your notes may still be in cubic inches or ounces.
Enter your measurements
Example inputs
Default dimensions, allowances and prices are example inputs. Replace them with your measurements and product label. Leave unknown product limits blank.
Converted value
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Start with the inputs to generate an order-ready estimate.
- Source value
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- Conservative
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- Planning note
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- Equivalent volume
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- Use case
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- Standard
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- Product fit
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Why This Estimate Changed
What moved the number
- Enter the form values to see raw volume, buffer, and recommendation.
Next Step
Match the result to the right resin class
Use the estimate to narrow the resin class first. Then confirm product limits, cure behavior, and measurement assumptions before you make a buying decision.
How many liters, ounces, and cubic inches are in a gallon of epoxy?
One US gallon of mixed epoxy is 3.785 liters, 4 quarts, 128 fl oz, or 231 cubic inches, and one liter is about 33.8 fl oz. Volume conversions are exact. Converting volume to weight is not: kits sold by weight need the resin density from the data sheet.
| Volume | Liters / ml | US fl oz | Cubic inches | US gallons |
|---|---|---|---|---|
| 1 gallon | 3.785 L | 128 | 231 | 1 |
| 1/2 gallon | 1.893 L | 64 | 115.5 | 0.5 |
| 1 quart | 946 ml | 32 | 57.75 | 0.25 |
| 16 fl oz | 473 ml | 16 | 28.88 | 0.125 |
| 1 liter | 1,000 ml | 33.81 | 61.02 | 0.264 |
| 500 ml | 500 ml | 16.91 | 30.51 | 0.132 |
| 100 cu in | 1.639 L | 55.41 | 100 | 0.433 |
US liquid measures. UK (imperial) gallons and fluid ounces are larger.
What this calculator covers
- Converts the units epoxy buyers and manufacturers actually use.
- Useful when your measurement notes and supplier listings are not in the same unit system.
- Best treated as a bridge between the geometry pages and the final project plan.
How to measure or set the inputs
- Choose the source and target volume units before typing the value.
- Enter the number exactly as it appears in your notes, spreadsheet, or supplier listing.
- Use the converted result inside a scenario page if the project still needs waste, layer, or product-fit guidance.
Common mistakes that cost money
- Mixing linear measurement thinking with volume conversion in the same step.
- Forgetting whether the source value is gallons, quarts, liters, or fluid ounces.
- Treating unit conversion as a replacement for project planning.
Project checklist before you buy
- Confirm the mold or surface is sealed before mixing resin.
- Measure depth twice at the deepest point of the project.
- Add extra material for waste, seepage, and edge soak-in.
- Confirm the resin type matches the intended pour depth.
- Prepare cups, stir sticks, gloves, and a level work surface.
FAQ
Questions people ask before buying epoxy
When should I use the converter instead of a calculator page?
Use the converter when the geometry is already solved and you only need to move between units. If you still need waste, layer, or project-fit guidance, move back to the matching calculator page.
Can I use this for comparing product kit sizes across brands?
Yes. That is one of the best uses for the page, especially when one brand lists liters and another lists gallons or ounces.
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Reviewed · Calculation notes and corrections