Free · Everyday planning calculators

Pool Salt Mixing Balance

Compute a supplied concentration change or replacement-water volume without recommending an equipment target.

  • Formula & worked example
  • Private in your browser
  • No signup
Go to tool

Calculator inputs

Loading calculator…

How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

Raising 1,000 liters from 1,000 to 2,000 ppm requires 1 kg under the dilute-water approximation.

Added salt mass = concentration increase × volume; replacement fraction = (current − desired) / current

Worked example

Enter these known values and leave the other values blank.

Pool volume
1000 L
Current salt concentration
1000 ppm
Desired salt concentration
2000 ppm
Amount of salt to add
1 kg

Assumptions and limitations

  • Supply the salt concentration required by your own equipment. The model assumes uniform mixing, ppm as mass per liter of water and zero-salt replacement water. Rounded display copies use two decimals; dosing decisions require an actual concentration measurement.

Common questions

What assumptions affect this result?

Supply the salt concentration required by your own equipment. The model assumes uniform mixing, ppm as mass per liter of water and zero-salt replacement water. Rounded display copies use two decimals; dosing decisions require an actual concentration measurement.

Can I solve for a missing value?

Clear the missing field and enter compatible known values in the displayed units. Supported inverse branches remain available; rounding and one-way outputs keep their original direction.

References

Translate the captured scalar helper functions into pinned local arithmetic, including every presentation formula and supported inverse. Original JavaScript is retained as evidence and is not shipped. Two-decimal copy uses floor(x*100+0.5)/100, preserving JavaScript rounding also for hidden negative quantities. The captured nonnegative concentration bounds permit zero; keep the add, dilute and equal-concentration results visible at those boundaries, and leave the undefined zero-current dilution branch empty.

Explore everyday planning calculators or browse all everyday life calculators.