Sodium Hypochlorite PPM Calculator
Work out exactly how much sodium hypochlorite (chlorine) concentrate you need to hit a target PPM (parts per million), plus the plain 1 : X ratio you can scale to any bucket, drum, or dosing pump.
1. Stock strength (% of available chlorine)
The % of available chlorine will be listed on the label, however, Sodium Hypochlorite (Hypo) degrades over time. It's strength is especially affected by light and exposure. That's why you should confirm the true strength with your supplier or with a recent test rather than trusting the label. Pick a preset or type your own.
2. PPM target concentration
1 ppm = 1 mL of available chlorine per 1,000,000 mL of solution — so stock that is 12.5% available chlorine is 125,000 ppm before it's diluted. Pick a preset or type your own.
3. Amount of ready-to-use solution needed (batch size)
How much ready-to-use solution you want to end up with. Pick a preset or type an amount, then choose mL or L.
All measurements are in metric (mL / L).
Handling the mix
- Add concentrate into water, not water into concentrate — it keeps any splash diluted from the first drop.
- Never mix with acid, ammonia, or other cleaning chemicals — mixing Sodium Hypochlorite with acid releases chlorine gas.
- Gloves, eye protection, and airflow — mix in a ventilated area, same as you would with any concentrate.
- Diluted ready-to-use solution loses strength fast — mix only what you'll use and dose it within 24 hours for a reliable result.
- Label the container — contents, ppm, and mix date, especially if it's going into a bottle or drum for later use.
Common ballpark ranges
These are commonly cited ballpark figures, not a recommendation. Always confirm the exact ppm your task requires against the product SDS, your site procedure, or the relevant health authority before you mix and use a solution.
1. Stock strength (% of available chlorine)
The % of available chlorine will be listed on the label, however, Sodium Hypochlorite (Hypo) degrades over time. It's strength is especially affected by light and exposure. That's why you should confirm the true strength with your supplier or with a recent test rather than trusting the label. Pick a preset or type your own.
2. PPM target concentration
1 ppm = 1 mL of available chlorine per 1,000,000 mL of solution — so stock that is 12.5% available chlorine is 125,000 ppm before it's diluted. Pick a preset or type your own.
3. Amount of ready-to-use solution needed (batch size)
How much ready-to-use solution you want to end up with. Pick a preset or type an amount, then choose mL or L.
All measurements are in metric (mL / L).
Handling the mix
- Add concentrate into water, not water into concentrate — it keeps any splash diluted from the first drop.
- Never mix with acid, ammonia, or other cleaning chemicals — mixing Sodium Hypochlorite with acid releases chlorine gas.
- Gloves, eye protection, and airflow — mix in a ventilated area, same as you would with any concentrate.
- Diluted ready-to-use solution loses strength fast — mix only what you'll use and dose it within 24 hours for a reliable result.
- Label the container — contents, ppm, and mix date, especially if it's going into a bottle or drum for later use.
Common ballpark ranges
These are commonly cited ballpark figures, not a recommendation. Always confirm the exact ppm your task requires against the product SDS, your site procedure, or the relevant health authority before you mix and use a solution.
Quick Reference PPM Charts
PPM to Dilution Ratio
The dilution ratio needed to reach a target ppm, for common stock strengths of sodium hypochlorite (Hypo). Dilution ratio is Water : Concentrate — for example, 199:1 means 199 parts water to 1 part chemical.
| Stock Strength (% Available Chlorine) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Target PPM | 3% | 4% | 5% | 6% | 7% | 8% | 9% | 10% | 11% | 12% | 12.5% |
| 50 ppm | 1:599 | 1:799 | 1:999 | 1:1199 | 1:1399 | 1:1599 | 1:1799 | 1:1999 | 1:2199 | 1:2399 | 1:2499 |
| 100 ppm | 1:299 | 1:399 | 1:499 | 1:599 | 1:699 | 1:799 | 1:899 | 1:999 | 1:1099 | 1:1199 | 1:1249 |
| 200 ppm | 1:149 | 1:199 | 1:249 | 1:299 | 1:349 | 1:399 | 1:449 | 1:499 | 1:549 | 1:599 | 1:624 |
| 500 ppm | 1:59 | 1:79 | 1:99 | 1:119 | 1:139 | 1:159 | 1:179 | 1:199 | 1:219 | 1:239 | 1:249 |
| 800 ppm | 1:36 | 1:49 | 1:62 | 1:74 | 1:86 | 1:99 | 1:112 | 1:124 | 1:136 | 1:149 | 1:155 |
| 1,000 ppm | 1:29 | 1:39 | 1:49 | 1:59 | 1:69 | 1:79 | 1:89 | 1:99 | 1:109 | 1:119 | 1:124 |
| 1,500 ppm | 1:19 | 1:26 | 1:32 | 1:39 | 1:46 | 1:52 | 1:59 | 1:66 | 1:72 | 1:79 | 1:82 |
| 2,000 ppm | 1:14 | 1:19 | 1:24 | 1:29 | 1:34 | 1:39 | 1:44 | 1:49 | 1:54 | 1:59 | 1:62 |
| 5,000 ppm | 1:5 | 1:7 | 1:9 | 1:11 | 1:13 | 1:15 | 1:17 | 1:19 | 1:21 | 1:23 | 1:24 |
| 10,000 ppm | 1:2 | 1:3 | 1:4 | 1:5 | 1:6 | 1:7 | 1:8 | 1:9 | 1:10 | 1:11 | 1:12 |
Ratios rounded for readability. Figures assume straight dilution of sodium hypochlorite in water.
12.5% Sodium Hypochlorite | Quick Reference Chart
How much 12.5% sodium hypochlorite concentrate to add for each target ppm, at common ready-to-use batch sizes. Using a different stock strength? Use the chart above, or the XO2 Sodium Hypochlorite PPM Calculator.
| Amount of Ready-to-Use Solution Needed (Batch Size) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Target PPM | Concentrate | 500 mL | 750 mL | 1 L | 5 L | 10 L | 15 L | 20 L | 100 L |
| 50 ppm | 0.04% | 0.2 mL | 0.3 mL | 0.4 mL | 2 mL | 4 mL | 6 mL | 8 mL | 40 mL |
| 100 ppm | 0.08% | 0.4 mL | 0.6 mL | 0.8 mL | 4 mL | 8 mL | 12 mL | 16 mL | 80 mL |
| 200 ppm | 0.16% | 0.8 mL | 1.2 mL | 1.6 mL | 8 mL | 16 mL | 24 mL | 32 mL | 160 mL |
| 500 ppm | 0.4% | 2 mL | 3 mL | 4 mL | 20 mL | 40 mL | 60 mL | 80 mL | 400 mL |
| 800 ppm | 0.64% | 3.2 mL | 4.8 mL | 6.4 mL | 32 mL | 64 mL | 96 mL | 128 mL | 640 mL |
| 1,000 ppm | 0.8% | 4 mL | 6 mL | 8 mL | 40 mL | 80 mL | 120 mL | 160 mL | 800 mL |
| 1,500 ppm | 1.2% | 6 mL | 9 mL | 12 mL | 60 mL | 120 mL | 180 mL | 240 mL | 1.2 L |
| 2,000 ppm | 1.6% | 8 mL | 12 mL | 16 mL | 80 mL | 160 mL | 240 mL | 320 mL | 1.6 L |
| 5,000 ppm | 4% | 20 mL | 30 mL | 40 mL | 200 mL | 400 mL | 600 mL | 800 mL | 4 L |
| 10,000 ppm | 8% | 40 mL | 60 mL | 80 mL | 400 mL | 800 mL | 1.2 L | 1.6 L | 8 L |
Figures rounded for readability. All measurements are in metric (mL / L).
PPM to Dilution Ratio
The dilution ratio needed to reach a target ppm, for common stock strengths of sodium hypochlorite (Hypo). Dilution ratio is Water : Concentrate — for example, 199:1 means 199 parts water to 1 part chemical.
| Stock Strength (% Available Chlorine) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Target PPM | 3% | 4% | 5% | 6% | 7% | 8% | 9% | 10% | 11% | 12% | 12.5% |
| 50 ppm | 1:599 | 1:799 | 1:999 | 1:1199 | 1:1399 | 1:1599 | 1:1799 | 1:1999 | 1:2199 | 1:2399 | 1:2499 |
| 100 ppm | 1:299 | 1:399 | 1:499 | 1:599 | 1:699 | 1:799 | 1:899 | 1:999 | 1:1099 | 1:1199 | 1:1249 |
| 200 ppm | 1:149 | 1:199 | 1:249 | 1:299 | 1:349 | 1:399 | 1:449 | 1:499 | 1:549 | 1:599 | 1:624 |
| 500 ppm | 1:59 | 1:79 | 1:99 | 1:119 | 1:139 | 1:159 | 1:179 | 1:199 | 1:219 | 1:239 | 1:249 |
| 800 ppm | 1:36 | 1:49 | 1:62 | 1:74 | 1:86 | 1:99 | 1:112 | 1:124 | 1:136 | 1:149 | 1:155 |
| 1,000 ppm | 1:29 | 1:39 | 1:49 | 1:59 | 1:69 | 1:79 | 1:89 | 1:99 | 1:109 | 1:119 | 1:124 |
| 1,500 ppm | 1:19 | 1:26 | 1:32 | 1:39 | 1:46 | 1:52 | 1:59 | 1:66 | 1:72 | 1:79 | 1:82 |
| 2,000 ppm | 1:14 | 1:19 | 1:24 | 1:29 | 1:34 | 1:39 | 1:44 | 1:49 | 1:54 | 1:59 | 1:62 |
| 5,000 ppm | 1:5 | 1:7 | 1:9 | 1:11 | 1:13 | 1:15 | 1:17 | 1:19 | 1:21 | 1:23 | 1:24 |
| 10,000 ppm | 1:2 | 1:3 | 1:4 | 1:5 | 1:6 | 1:7 | 1:8 | 1:9 | 1:10 | 1:11 | 1:12 |
Ratios rounded for readability. Figures assume straight dilution of sodium hypochlorite in water.
12.5% Sodium Hypochlorite | Quick Reference Chart
How much 12.5% sodium hypochlorite concentrate to add for each target ppm, at common ready-to-use batch sizes. Using a different stock strength? Use the chart above, or the XO2 Sodium Hypochlorite PPM Calculator.
| Amount of Ready-to-Use Solution Needed (Batch Size) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Target PPM | Concentrate | 500 mL | 750 mL | 1 L | 5 L | 10 L | 15 L | 20 L | 100 L |
| 50 ppm | 0.04% | 0.2 mL | 0.3 mL | 0.4 mL | 2 mL | 4 mL | 6 mL | 8 mL | 40 mL |
| 100 ppm | 0.08% | 0.4 mL | 0.6 mL | 0.8 mL | 4 mL | 8 mL | 12 mL | 16 mL | 80 mL |
| 200 ppm | 0.16% | 0.8 mL | 1.2 mL | 1.6 mL | 8 mL | 16 mL | 24 mL | 32 mL | 160 mL |
| 500 ppm | 0.4% | 2 mL | 3 mL | 4 mL | 20 mL | 40 mL | 60 mL | 80 mL | 400 mL |
| 800 ppm | 0.64% | 3.2 mL | 4.8 mL | 6.4 mL | 32 mL | 64 mL | 96 mL | 128 mL | 640 mL |
| 1,000 ppm | 0.8% | 4 mL | 6 mL | 8 mL | 40 mL | 80 mL | 120 mL | 160 mL | 800 mL |
| 1,500 ppm | 1.2% | 6 mL | 9 mL | 12 mL | 60 mL | 120 mL | 180 mL | 240 mL | 1.2 L |
| 2,000 ppm | 1.6% | 8 mL | 12 mL | 16 mL | 80 mL | 160 mL | 240 mL | 320 mL | 1.6 L |
| 5,000 ppm | 4% | 20 mL | 30 mL | 40 mL | 200 mL | 400 mL | 600 mL | 800 mL | 4 L |
| 10,000 ppm | 8% | 40 mL | 60 mL | 80 mL | 400 mL | 800 mL | 1.2 L | 1.6 L | 8 L |
Figures rounded for readability. All measurements are in metric (mL / L).
Our latest content
Check out what's new in our company !