Epoxy Resin Calculator & Timer

This epoxy resin calculator tells you exactly how much resin to mix for your mold, river table or resin art — and how to split it into part A and part B — so you stop wasting resin or running short mid-pour.

Mold volume
• Rectangle, cylinder, sphere and hemisphere molds
• cm, mm or inches; multiply by the number of molds (coaster sets, keychains)
• River tables: use the average gap width
• Add an extra margin for what sticks to cups and stir sticks

Mix A and B
• Any ratio: 1:1, 2:1, 3:1, 100:45 or your own
• By volume (mL, fl oz) or by weight (g, oz) using your resin's density

Deep pours
• Enter your resin's maximum layer depth to see how many pours you need and how much to mix each time

Cure timer
• Presets for art resin, coating, deep pour and fast set — or your label's times
• Live countdown for pot life and demold time, plus a notification when it is time to demold

Projects and cost
• Save a calculation as a project with notes and reopen it later
• Enter your kit size and price to see what each pour costs

Your data stays on your phone
• No account, no subscription, works offline
• Move everything to a new phone with a backup file

Always follow the instructions and safety data sheet of your resin. A small banner ad is shown at the bottom of the app.