Bath Water Temperature Mix
Mix hot and cold water to find the resulting temperature.
About Bath Water Temperature Mix
The final temperature is a volume-weighted average of the hot and cold water you mix together. Water above about 40 degrees can scald, so checking the mixed temperature avoids burns during bathing.
Formula
Bath Water Temperature Mix
Mixed temp = (hot x hot volume + cold x cold volume) / total volume
- total volume
- Combined hot and cold water volume
Worked example
With the default values below, Bath Water Temperature Mix returns Mixed Temperature of 42.5. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Hot water tempminimum 0 °C
- 60 °C
- Cold water tempminimum 0 °C
- 25 °C
- Hot water volumeminimum 0 L
- 1 L
- Cold water volumeminimum 0 L
- 1 L
Results
- Mixed Temperature
- 42.5 °C
- Total Volume
- 2.00 L
- Comfort Level
- Very hot, handle with care
Step by step
- 1Values used
- 2Bath Water Temperature Mix
- 3Mixed Temperature= 42.5 °C
- 4Total Volume= 2.00 L
- 5Comfort Level= Very hot, handle with care
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Bath Water Temperature Mix calculated?
Mixed temp = (hot x hot volume + cold x cold volume) / total volume The final temperature is a volume-weighted average of the hot and cold water you mix together.
Why does Bath Water Temperature Mix matter?
Water above about 40 degrees can scald, so checking the mixed temperature avoids burns during bathing.
What values do I need to enter?
This calculator takes 4 inputs: Hot water temp, Cold water temp, Hot water volume, Cold water volume. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.