What is the density of epoxy resin?
Many mixed epoxy systems are roughly 1.0–1.2 kg/L (1,000–1,200 kg/m³), but there is no universal value. Use the density published for your exact epoxy whenever accuracy matters, then use the calculator below to convert between volume and weight.
Convert epoxy volume and weight
Enter the density published for your resin system. Your Metric / Imperial preference is remembered across EpoxyCalc.
Typical epoxy resin density
There is no single universal density for every epoxy. Formulations differ, and resin and hardener can also have different densities. The table below is a quick conversion reference, not a substitute for the technical data sheet of the product you are using.
| Density | Equivalent | Weight of 1 L | Weight of 10 L |
|---|---|---|---|
| 1.00 kg/L | 1,000 kg/m³ | 1.00 kg | 10.0 kg |
| 1.10 kg/L | 1,100 kg/m³ | 1.10 kg | 11.0 kg |
| 1.20 kg/L | 1,200 kg/m³ | 1.20 kg | 12.0 kg |
Litres to kilograms
The formula is weight (kg) = volume (L) × density (kg/L). If a mixed epoxy has a density of 1.10 kg/L, then 5 L weighs about 5.5 kg and 20 L weighs about 22 kg.
Kilograms to litres
Reverse the calculation with volume (L) = weight (kg) ÷ density (kg/L). A 15 kg kit with a mixed density of 1.10 kg/L represents about 13.64 L of material.
Epoxy density in kg/L and kg/m³
To convert kg/L to kg/m³, multiply by 1,000. For example, a density of 1.10 kg/L equals 1,100 kg/m³. To convert kg/m³ back to kg/L, divide by 1,000.
Why density matters when buying epoxy
Project geometry is normally easiest to calculate as volume, while many manufacturers sell kits by mass. Using the correct density lets you compare the amount you need with the amount actually supplied in a kit without assuming that one kilogram equals one litre.
Resin and hardener density are not always the same
Do not use this tool to convert a volume mix ratio into a weight mix ratio unless the manufacturer explicitly provides the required densities or both ratios. For mixing proportions, use the published ratio directly in the resin and hardener ratio calculator.
Convert weight into coverage area
If you know a kit's weight and density and want to estimate how many square metres or square feet it can cover at a chosen thickness, use the epoxy coverage calculator.