What it helps you decide
Convert common vessel capacity or a water test into wax fill weight.
Candle production
Convert vessel capacity into an actual wax pour weight.
Start with a common jar or tin capacity, account for headspace and blend density, then calculate wax and fragrance for one vessel or a production run.
Start with the example
The values already filled in are a working example—not a recommendation.
- 1Choose the closest starting point.
- 2Replace the example with your real details.
- 3Read the live result and its important limits.
Your numbers
Vessel, wax, and batch
Use the filled example first. Then replace each field with a measured value or your best current estimate.
Step 1Answer one question at a time. Your example values stay available.
Important limit
Capacity names do not equal candle net weight.
Confirm the exact vessel lot with a water-weight test, use the wax supplier density if available, leave a tested fill and wick clearance, and complete full burn testing. Presets are nominal planning capacities and can change by supplier or model revision.
About this free craft materials & fabrication tool
How to use the Wax & Vessel Pour Volume Calculator
Convert common vessel capacity or a water test into wax fill weight. The calculator runs privately in your browser and is designed to make the assumptions behind the answer visible.
What to have ready
Measure the real mold, vessel, fabric, or batch; then use the exact supplier ratio, density, usage ceiling, cure instructions, and expected waste.
Key inputs: Vessel planning preset; Measured water capacity to fill line; Capacity source; Headspace / fill reduction; Wax blend density.
How to use the result
Use the estimate to prepare a controlled test quantity. Confirm fit, cure, burn, color, strength, or cut yield before committing a full production run.
Complete workflow guide
Candle, soap, and cosmetic formulation
A calculator can check the math. A reliable product also needs clear supplier information, a repeatable process, testing in the final package, and the right label for what the product is and what you claim it does.
Learn the workflow
Helpful guides for this calculator
Craft & FormulationCandle Vessel Lot Changes: When to Repeat Burn Testing
Evaluate glass dimensions, wall thickness, finish, color, supplier, and performance when a candle vessel or lot changes.
Read the guide →Craft & FormulationCandle Wax and Fragrance: Calculate Fill Weight Before You PourConvert vessel capacity to wax blend weight, include fragrance load, and plan a test batch without confusing fluid ounces and ounces by weight.
Read the guide →Ready for the connected version?
Turn the calculation into a repeatable workflow.
Batch Scale connects recipes, materials, costs, inventory, production, sales, and your storefront in one workspace.