Struggling to work out how much resin you need to mix for your project? Take a look at our resin calculator:

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Resin Calculator (Volume-Based)

NOTE: This is a formula for rectangular or flat molds.

• Step 1: Measure Your Mold or Project
  Use inches or centimeters (just stay consistent).
  
  Length × Width × Height = Volume
  
• Step 2: Convert Volume to Resin Amount
  
  • If measuring in INCHES
    
    1 cubic inch = 0.554 oz of resin
    Volume (in³) × 0.554 = Total Resin (oz)
    
  • If measuring in CENTIMETERS
    
    1 cubic cm = 1 ml of resin
    Volume (cm³) = Total Resin (ml)

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Quick Reference Chart

Cubic Inches	Resin Needed (oz)
5 in³	2.8 oz
10 in³	5.5 oz
15 in³	8.3 oz
20 in³	11.1 oz
25 in³	13.9 oz

Volume (cm³)	Resin Needed (ml)
50	50 ml
100	100 ml
200	200 ml
500	500 ml

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Mixing Resin & Hardener

Lots of epoxy resins are 1:1 ratio (always check your bottle).

Example (1:1 Resin)

Total needed: 10 oz
Resin: 5 oz
Hardener: 5 oz

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WARNING ⚠️ Always follow your brand’s ratio (some are 2:1 or by weight).

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Pro Tips:

• Add 5–10% extra for spills & cup loss
• Measure by volume unless your resin says “by weight”
• Deep pours = mix in small batches to avoid overheating

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