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Pool Calculator

Understand your pool test results and what to address next

Enter your pool size and core water readings. Avenblu will interpret them together, organize the next actions, and show when to circulate, retest, or ask for professional help.

Avenblu

Pool care made simple means practical guidance, clearer language, and enough restraint to tell you when it is time to verify a label or call a professional.

Enter my test resultsUnderstand pool chemistry

Step 1

Enter the core readings

Use a fresh test for free chlorine, pH, and total alkalinity plus your pool size.

Step 2

Improve the context

Add CYA, combined chlorine, calcium, salt, temperature, or surface type when you know them.

Step 3

Act, circulate, and retest

Follow the first action before moving to the next one. Use a new reading for the next decision.

Enter your test

Start with pool size and three core readings

Enter free chlorine, pH, and total alkalinity from a fresh test. Optional readings such as CYA, combined chlorine, calcium, salt, and temperature make the interpretation more specific, but they are not required for a useful starting result.

Core readings requiredAdvanced readings optional

Pool size

Use this if you already know the volume. Otherwise leave it blank and enter dimensions.

Use the average of the shallow and deep ends.

Core sanitizer reading

Choose Salt system if a salt cell generates chlorine. Select Not sure if you do not know.

The chlorine currently available to sanitize the water.

Core balance readings

Shows how acidic or basic the water is.

The buffer that helps keep pH from swinging.

Current water condition

Choose the closest condition so cleanup guidance is not treated like routine maintenance.

Optional readings and planning settings

Add what you know. Leave anything else blank; Avenblu will explain where the result is less specific.

Surface context helps explain aggressive or scaling water. Not sure is okay.

Found on many pool test kits as CYA or stabilizer. It allows a more pool-specific chlorine target.

Useful when the pool has odor, irritation, or lingering cleanup demand.

Needed with pH and alkalinity to estimate saturation balance.

Temperature improves the saturation-balance context.

Check the product label. The default is 10%.

Avenblu will raise this target when the existing CYA-aware method requires it.

Used only for conservative starting-dose guidance.

Used only when sizing an alkalinity increase.

Avenblu will organize the result into what to do first, what comes next, and when to retest. It will not tell you to stack several corrections at once.

Your result

Enter a fresh test to see what matters first

Avenblu will interpret the readings together, put actions in a safer order, explain where optional data would help, and give you a retest window. The calculator stays free and does not require an account.

  1. 1.Enter pool size and core readings.
  2. 2.Add any optional readings you know.
  3. 3.Calculate, make one deliberate correction, circulate, and retest.

This PDF will include the current calculator result only. Sign in and save a pool profile if you want account-level pool details included.

Calculator outputs are informational starting points for homeowners, not manufacturer instructions or a substitute for full water testing. Always verify the product label, circulate the water, and re-test before repeating an adjustment. Escalate severe algae, equipment issues, stains, or unsafe conditions to a qualified pool professional.

See how Avenblu sources and classifies pool-care guidance.

After the calculator

Keep the next test tied to the pool

The calculator remains useful without an account. When you want history, reminders, or a saved Pool Plan, these are the next available steps.

Follow-up

Create free account

Keep the next step tied to an Avenblu account so dashboard follow-up is possible.

Follow-up

Upgrade to Plus

Move from a one-off calculator session into saved pools, history, and Pool Plan.

Follow-up

Save a pool

Turn the volume estimate into a saved pool profile instead of retyping the setup next time.

Follow-up

Create Pool Plan

Move from calculator output to a dashboard plan with saved readings and follow-up timing.

Follow-up

Ask support

Use the account-tied support workflow when the chemistry or product next step stops being straightforward.

Community

Join the community

Ask a pool-care question, share your issue, or join the weekly check-in from a real Avenblu account.

Community invitation

Ask one useful question, or start with a simple introduction

Avenblu grows the community through real pool-care questions and firsthand answers. The best way to make it more useful is to post a real question, join the weekly check-in, or introduce your pool setup with a few honest details.

Ask a pool-care questionJoin the weekly pool check-inIntroduce yourself

Weekly topic

Share what your water looks like this week

Clear water, cloudy drift, algae recovery, or a chemistry question that still feels unresolved all belong in the weekly check-in thread.

Open the weekly thread

Starter checklist

Post details that make the next answer better

  • Know the pool type and rough gallons or dimensions.
  • Share chlorine, pH, and alkalinity if you have them.
  • Describe the issue and what changed recently.
  • List what you already tried before asking for another dose.
Browse pool-care guides

Next step

Pool chemistry guide

See how chlorine, pH, alkalinity, stabilizer, calcium, salt, and temperature interact.

Next step

pH and alkalinity

Use the calculator alongside a plain-English guide to buffering and pH drift.

Next step

Plan the retest

Turn the dose into a follow-up schedule so one correction does not become three guesses.

Pool calculator FAQ

What to know before and after you calculate

What pool test results do I need?
Start with free chlorine, pH, and total alkalinity plus either a known pool volume or enough dimensions to estimate it. CYA, combined chlorine, calcium hardness, salt, water temperature, and surface type are optional readings that make the interpretation more specific.
Can I use the calculator without a CYA reading?
Yes. Avenblu uses the existing conservative chlorine fallback when CYA is unavailable and explains the limitation. Adding CYA later allows a more pool-specific, stabilizer-aware chlorine target.
How often should I test my pool water?
Testing frequency depends on use, weather, local requirements, and the condition of the water. Test again after a meaningful correction and circulation period, and test sooner after storms, heat, heavy swimming, or a visible change.
Why should I avoid adjusting several chemicals at once?
Stacked corrections make it harder to know what worked and increase the chance of overshooting or combining incompatible products. Make one deliberate correction, circulate for the label-directed time, then retest before deciding again.
Does the calculator work for saltwater pools?
Yes. Choose Salt system as the sanitizer type. The result still treats the pool as a chlorine pool and considers broader pH, alkalinity, CYA, calcium, temperature, and salt-cell balance context when those readings are available.
When should I call a pool professional?
Get qualified help for extreme or unstable readings, severe contamination, failed circulation, major overdose concerns, persistent scale or surface damage, or any situation involving fumes, spills, burns, or suspected chemical mixing.