Tools & Calculators
Test it, write it down, repeat.
Save a recipe, log each burn test against it, and see what the results usually mean. Everything stays in your own browser, and you can export it any time.
Recipes
Your browser is blocking local storage, so this log will not be saved. Export it before you leave the page.
No recipes yet. Add your first one below.
Add a recipe
Burn tests
Choose or add a recipe to start logging burn tests.
Log a burn test
Tests for this recipe
No tests logged yet.
Your data
How to use this
Make one recipe per candle you are developing, then log each burn test against it. A good test run is three wick sizes in the same wax, container and fragrance, burned in four-hour sessions with a note after each hour, and burned all the way down at least once. Change one thing at a time so you know what caused the difference. TheWick Selector gives you the starting sizes to test.
What the readings mean
The reading under each test is general guidance, not a wick size. Tunneling or a small flame usually means the wick is too small. A tall flame, heavy soot or a hot jar usually means it is too large, and a hot jar means put the candle out and let it cool. Heavy dye and high fragrance loads can change the answer, so check your supplier's guidance too. See the Candle Troubleshooting guide for more.
Where your data lives
Recipes and tests are saved only in this browser on this device. Nothing is sent to Flint & Wax. Clearing your browser data or switching devices will lose them, so export a backup now and then, and use Import backup to restore it or move it to another device.
These are estimates to start from. Always pour a test candle and confirm the numbers with your own supplier's data.