Pour volume
—
Shop estimate. Measure your stock and cut a test on scrap.
How to use it
- For a pour, choose a rectangle or a circle and enter the size and the depth in the unit you are working in.
- Add an extra percent if you want to cover what stays in the cup. That extra is your allowance.
- Enter the volume ratio, such as 2:1. The split is by volume. If the can says grams, use a scale.
- For a film finish, enter the area, the square metres per litre per coat from the label, and the number of coats.
- If the label already includes two coats in one rate, enter one coat.
The formula
Rectangle = length × width × depth. Circle = π × radius² × depth. Litres of finish = area ÷ spread rate × coats.
- Ratio. Resin parts and hardener parts by volume. 2 and 1 means two thirds resin.
- Spread. From the can, per coat, in square metres per litre. A foot-gallon number has to be converted before you type it.
- Extra. A percent on the pour for the cup and the stick. It is not a second chemical reaction.
Worked example
A pour 1000 by 500 mm, 5 mm deep, is 2.5 litres (2,500 ml). Split 2:1 by volume and the resin is 1.667 litres and the hardener is 0.833 litres. If the maker says to weigh the parts, weigh them. This split is volume only.
A finish that covers 10 square metres per litre per coat, on 10 square metres, for 2 coats, needs 2 litres. If the can already quotes a two-coat system, enter 1 coat or you will double the buy.
What it will not decide
- No weight ratio, no pot life, no maximum pour depth, no exotherm. Those are on the product sheet.
- Coverage assumes every coat spreads like the rate you typed. Later coats on sealed wood often go further.
- It is not a specification for a food surface, a bar top, or a floor. Follow the product, not a volume.
Questions
Can I enter a 5:1 or 1:1 system?
Yes. Type the two parts. The page does not know which bottle is which. Keep resin in the resin field.
What about a round river in a table?
A circle is a rough stand-in for a round void. A wandering river is not a circle. Measure the area another way, then use the depth. When the shape is the whole question, the volume will be a guess.
Do you recommend a brand?
No. Bring the rate and the ratio from the can you bought. Two finishes with the same name on the lid can still quote different coverage.