Example data table
| Use case | Target batch | Method | Mix | Concentrate | Water |
|---|---|---|---|---|---|
| Tool cleanup after pruning | 1 L | Ratio | 1:20 (conc:water) | 47.62 mL | 952.38 mL |
| Greenhouse bench wipe-down | 2 L | Strength | 10% → 1% | 200 mL | 1,800 mL |
| Patio cleaner from leftover concentrate | — | Available | 250 mL at 1:10 (conc:water) | 250 mL | 2,500 mL |
Values above are examples only. Always follow the cleaner label and local safety guidance.
Formula used
- Ratio (conc:water): Concentrate = Final × (ConcParts ÷ (ConcParts + WaterParts)).
- Ratio (conc:total): Concentrate = Final × (ConcParts ÷ TotalParts).
- Strength method: C1V1 = C2V2, so V1 = (C2 × V2) ÷ C1.
- Water: Water = Final − Concentrate.
- Unit conversion: All calculations use milliliters internally.
How to use this calculator
- Select a calculation method that matches your label or goal.
- Enter your final batch volume and choose the volume unit.
- Fill in ratio parts or strengths, depending on the method.
- Press Calculate dilution to view concentrate and water.
- Use the CSV/PDF buttons to save a mixing record.
Dilution accuracy for garden cleaners
Concentrated cleaners must be diluted, and small measuring errors scale quickly in sprayers. A 2 L batch mixed 10% strong can leave residue, reduce coverage, and raise risk of plant stress on accidental contact. A mix that is 10% weak may underperform, causing extra passes and more runoff. This calculator converts your target batch into exact concentrate and water volumes for 500 mL bottles, 1–2 L sprayers, and 1 gallon jugs with fewer errors across tasks.
Reading ratio labels without confusion
Labels often show 1:20, but the definition varies. “Concentrate:Water” means one part concentrate plus twenty parts water, so concentrate fraction is 1 ÷ (1+20) = 4.76%. “Concentrate:Total” means one part within twenty total parts, so fraction is 1 ÷ 20 = 5%. Over 5 L, that difference changes concentrate by about 12 mL. Match the option to your label wording.
Strength targets with the C1V1=C2V2 rule
If a product lists active strength, you can dilute to a target percent or ppm using C1V1 = C2V2. For stock 10% and target 1% in 2 L, V1 = (1×2000) ÷ 10 = 200 mL concentrate; the remainder, 1800 mL, is water. The same structure works for ppm when both inputs use ppm, supporting consistent mixing for benches and tools.
Units, measuring tools, and rounding
All inputs are converted to milliliters internally, then displayed in your chosen unit. For doses under 20 mL, a syringe or graduated cylinder improves accuracy. For larger batches, a marked jug is fine. If you round, round concentrate slightly up and water down to stay close to target strength. Add water first, then concentrate, then top up.
Records, repeatability, and safe handling
Repeatable dilutions let you compare performance between seasons and products. Save task details in notes, then export a CSV log or a PDF job sheet. Follow the label for PPE, dwell time, and disposal. Never mix incompatible chemicals, and rinse equipment after use to protect seals and prevent cross‑contamination.
FAQs
Which ratio option matches most labels?
Use “Concentrate:Water” if the label says “1 part product to 20 parts water” or “add 20 parts water.” Use “Concentrate:Total” only when it says “1 part in 20 total parts.”
What does the available concentrate mode do?
It calculates the largest final batch you can mix from the concentrate you have left, using your selected ratio style. It returns the final volume plus the required water amount.
Can I mix percent and ppm values together?
No. Enter stock and target in the same strength unit. If you only have percent, stay in percent. If the label uses ppm, use ppm for both inputs to avoid incorrect dilution.
Why do results differ from my measuring cup marks?
Kitchen cups can be imprecise, and some labels assume rounded field measurements. This tool calculates exact volumes from your inputs. Choose a consistent unit, then measure with graduated tools for better repeatability.
Should I add concentrate first or water first?
For most mixes, add water first, then concentrate, then top up with water. This reduces foaming and helps you reach the final volume accurately, especially in narrow-neck sprayers and bottles.
How long can I store a mixed solution?
Follow the product label. Many solutions lose strength over time or react with minerals. Mix only what you need, label the container, store away from heat and sunlight, and dispose responsibly.