Candle Burn Time Calculator
Estimate candle burn time from net wax weight and a user-measured wax consumption rate.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Estimate burn time from net wax weight and a burn rate measured on the same candle design. Enter wax consumed per hour from a controlled burn test; the default rate is only a sample value. This arithmetic estimate does not replace manufacturer testing or candle-safety instructions. The day count assumes four burn hours per day.
Worked example
calculated with the default values below
Net wax weight 8 oz · Measured wax use per hour 0.1 oz/h Estimated burn time 80 h · Burn rate 0.1 oz/h · Days at 4 burn hours per day 20 days
General background references
Disclaimer
These calculators provide planning estimates only. Building codes, wiring regulations and safety requirements differ by country and change over time, and nothing here replaces a licensed professional or a permit. For structural, electrical or gas work, follow local code and have the installation inspected.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
T = W ÷ r; days = T ÷ 4
- W
- Net wax weight (oz)
- r
- Measured wax use per hour (oz/h)
- T
- Burn time (h)
W is net wax weight and r is user-entered measured wax consumption per hour for the same candle design. The default is an example; days assumes 4 burn hours/day.
Frequently asked questions
How do I estimate a candle’s burn time?
Divide net wax weight by measured wax consumption per hour for the same candle design. Enter a burn rate from a controlled test; the default is only a sample value. Actual burn performance depends on the candle and conditions, so follow manufacturer testing and safety instructions. Days are calculated at four burn hours per day.