How much chlorine does my pool need?
Calculate the amount of chlorine your pool needs based on volume, current and target level – for safe pool water.
Pool volume, current level and target level are the key figures. The calculator gives you a practical estimate.
How the calculation works
- Enter the pool volume.
- Enter the current chlorine level.
- Choose the target level and chlorine type.
- Calculate the amount and follow the product instructions.
The result is an estimate. Chlorine products have different concentrations, so always follow the manufacturer instructions.
Calculator
Enter the values, choose a unit system and check the result.
Example: Example: 24,000 litres, a current level of 0.5 mg/l and a target level of 2.0 mg/l.
Pro tips
- Ideally measure the chlorine level in the evening once UV exposure has stopped.
- Always add chlorine to the water, never the other way around.
- Wait at least 30 minutes after adding chlorine before measuring again.
Calculate shock chlorination
For heavy algae growth, cloudy water or after intense use, a one-time shock dose with a much higher target value than normal operation helps. Do not use the pool for 24-48 hours afterwards and re-test before swimming again.
Pro tips
- Always shock-treat in the evening, since UV light breaks down chlorine quickly during the day.
- Keep the filter system running during and after shock treatment.
Frequently Asked Questions
How much chlorine does my pool need?
The right amount depends on your pool volume, the current chlorine level and your target level. A pool chemistry calculator helps you work out the exact dose.
What chlorine level is ideal for a pool?
For most private pools, the target level is around 1 to 3 mg/l, depending on water conditions and swim season. The exact recommendation also depends on water quality and pool type.
How often should I test the pool chlorine level?
Ideally you test the chlorine level regularly, especially after rain, heavy use, or adding new chemicals. That keeps the level stable and the water comfortable.
Can a pool chemistry calculator help me avoid overdosing?
Yes. If you enter accurate current and target values, a pool chemistry calculator can estimate the dose more precisely and help you avoid overdosing.
Which type of chlorine is right for my pool?
Liquid chlorine, granular chlorine and chlorine tablets each suit different situations. The right type depends on your pool equipment, water condition and how you want to apply it.