TotalBoat Plastic Paint Pails and Epoxy Mixing Cups have 4 measurement guides to help you measure out the correct ratio of resin to hardener in the same cup. The guides are printed on the sides of the cups and labeled by mix ratio.

Choose the guide with the correct mix ratio for your epoxy. Each guide has 2 columns labeled with numbered fill levels. Pick a number in the left column and add resin into the mixing cup until it reaches that level. Note that the same number in the right column is a bit higher up. Next, add the hardener until the epoxy reaches the level of the matching number in the right column.

Be sure to scrape the sides and the bottom of the cup, and mix the two components together for at least 3 minutes.