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Easily check and balance your swimming pool's pH with our free Pool pH Calculator. Get instant results, LSI analysis, and chemical dosage guidance.
Keeping your pool water clean isn't just about chlorine. The pH level plays a big role too. If the pH is too high or too low, your water can turn cloudy, irritate skin, or even damage pool parts. That’s where our Pool pH Calculator comes in. It helps you find out what your pool needs fast, easy, and stress-free.
Think of pH as the mood of your pool. A good mood (pH level) means happy swimmers, safe water, and less chemical waste. The pH scale goes from 0 to 14:
A high pH (like 7.8 or more) can cause scale buildup, cloudy water, and make chlorine work less effectively.
Our Pool pH Calculator uses something called the LSI formula (Langelier Saturation Index). It checks not just your pH but also how your water feels overall balanced, corrosive, or scaling. Here’s how it works in simple terms.
pH + Temperature Factor + Calcium Factor + Alkalinity Factor − TDS Factor = LSI
The calculator looks at:
Using the calculator is simple. Just follow these steps:
You'll get instant results showing your LSI score, water condition, and expert advice.
Want to raise pH or lower it? Our tool also tells you how much chemical (like baking soda or acid) to add based on your pool volume.
Not quite. Baking soda (sodium bicarbonate) raises alkalinity first. It affects pH slightly, but not much. For bigger pH changes, people use soda ash (sodium carbonate). Use the calculator to decide which one your pool really needs.
Yes, sometimes. Chlorine shock can drop pH if it’s not a pH-neutral formula. Always test your water after shocking, and use the calculator to rebalance if needed.
It’s a bit high. While 7.8 is still okay, it’s close to the point where chlorine becomes less effective. If your water feels slippery or cloudy, it’s time to adjust it. Our calculator tells you the exact dosage to bring it back down.
Your pool’s health depends on balance. If your pH is off, everything else falls apart—chlorine stops working, water gets cloudy, and pool parts suffer. With our Pool pH Calculator, you can test, understand, and fix your water with zero guesswork.
Whether you're a new pool owner or a seasoned pro, this tool gives you peace of mind. Fast answers. Accurate results. Easy fixes.
If swimmers complain of itchy eyes or dry skin, or if your water looks cloudy or scaly, your pH might be too high or low.
Yes, but be careful. Baking soda helps with alkalinity. Vinegar and lemon juice are too weak. For proper control, stick to pool-grade chemicals.
Check at least 2–3 times a week. After rain, heavy swimming, or shocking the pool—always test again.
LSI (Langelier Saturation Index) shows if your water will corrode pool parts or leave scale. Balanced LSI = longer pool life.