Plan soaking mixes for seed priming and treatments. Handle product strength, units, and batches easily. Get clear doses for healthier starts in every tray.
Tip: If you lack density, use the grams output and weigh the product.
These formulas estimate solution strength. Always confirm permitted rates for your crop and product.
| Scenario | Inputs | Outputs |
|---|---|---|
| Seed priming mix | 2 L water, 500 ppm target, 20% product, density 1.10 g/mL | Active 1.0000 g, Product 5.0000 g, Product 4.55 mL |
| Stock dilution | 1 gal water, target 250 ppm, stock 2000 ppm | Stock 473.18 mL, top up to 1 gal |
| Label rate | 3 L water, rate 2 mL per L | Total dose 6.00 mL |
Examples are for demonstration only. Use approved products and follow label directions.
Seed pre-soaks can improve hydration, sanitize surfaces, or deliver gentle nutrients before sowing. Accurate dosing protects germination by avoiding phytotoxic concentrations and keeps treatments consistent between trays, batches, and seasons. For small seeds, even slight overdoses can reduce emergence. This calculator converts your target into a measurable amount, so you can scale confidently from jars to buckets.
Use the target concentration method when you know ppm or percent w/v and the product’s active percentage. Choose stock dilution when you already prepared a stronger concentrate and need a final working strength. Select label rate when the manufacturer provides mL or grams per volume and you only need totals. If your label lists teaspoons, convert to milliliters to reduce measuring variability.
In water, ppm is treated as mg per liter, which aligns with many horticultural labels. Percent w/v represents grams per 100 mL, useful for lab-style recipes. Stock labels may list g/L; the calculator converts that to mg/L for dilution. When converting product mass into milliliters, density matters; if you do not know density, weigh the dose for the most reliable measurement.
Small errors compound when volumes increase. The tool flags missing or zero inputs and encourages weight-based dosing when conversions are uncertain. Use clean containers, mix thoroughly, and label solutions with time and strength. Respect contact time and temperature; warmer water speeds uptake, while cold water may require longer soaking. Always verify that the chosen concentration is approved for your crop, seed type, and local guidance.
Exporting results supports traceability. Save CSV logs with dates, methods, and rates to compare germination outcomes over time. PDF printouts help teams follow the same recipe at the bench. Pair records with observations such as soak duration, rinse steps, and drying method. With repeatable dosing and documented steps, you can refine pre-soak protocols and reduce variability across production runs. Consistent logs simplify audits and training.
ppm is treated as mg per liter of water. Percent w/v means grams per 100 mL of solution. The calculator converts both into total active ingredient needed for your selected water volume.
Use it when you have a concentrated stock solution and want a weaker working solution. Enter the stock strength and your target strength, then the tool returns how many milliliters of stock to add.
Density is only needed to convert grams into milliliters. If density is unknown, weigh the product dose. Weight-based dosing is usually more reliable than volume for powders and many liquids.
Hard-coated seeds typically soak longer than soft-coated seeds. Warmer water speeds uptake, while cold water slows it. Use the guidance as a starting point and follow any crop-specific or product label limits.
Reusing solutions is not recommended because concentration can drift and contamination risk rises. Mix fresh batches when possible, and discard responsibly according to the product label and local regulations.
Standardize measuring tools, log each batch, and print the PDF recipe at the bench. Record soak duration, rinse steps, and drying method. Review CSV histories to link dose changes with germination outcomes.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.