Candle Making Calculators

Candle making has become one of the fastest-growing craft hobbies in the UK, with thousands of makers selling at local craft fairs, on Etsy and through independent shops. Whether you are working with soy wax, rapeseed wax from British farms, or traditional paraffin, getting your measurements right is essential for consistent, safe candles. Our wax weight calculator and fragrance oil calculator help you nail precise ratios every time, so you avoid common problems like tunnelling, poor scent throw and frosting.

If you plan to sell candles in the UK, you must comply with CLP regulations (Classification, Labelling and Packaging). Every candle containing fragrance oil needs a CLP-compliant label listing hazard pictograms, signal words and precautionary statements. Understanding your fragrance load percentage is not just about scent strength — it directly affects which hazard classifications apply. Our burn time calculator and candle cost calculator help you price your products realistically once you factor in CLP label printing, warning labels and packaging.

Choosing the correct wick size for your container diameter is one of the most critical steps in candle making. An undersized wick causes tunnelling, while an oversized wick can produce soot, mushrooming and dangerously large flames. Use our wick size calculator alongside the melt pool calculator to check that your candle achieves a full melt pool within the recommended two to four hours. Most UK candle suppliers such as Candle Shack, Supplies for Candles and NI Candle Supplies provide wick sizing guides — our tools help you cross-reference those recommendations with your specific container dimensions.