Build accurate mixes for beds, tools, trays, and reservoirs. Review formulas, exports, examples, and steps. Apply measured solutions carefully to support cleaner growing conditions.
| Use case | Water volume | Stock strength | Target ppm | Required concentrate |
|---|---|---|---|---|
| Light root support | 10 L | 3% | 30 ppm | 10.00 mL |
| Routine soil drench | 20 L | 3% | 50 ppm | 33.33 mL |
| Mild foliar test | 5 gal | 12% | 40 ppm | 6.31 mL |
| Reservoir refresh | 50 L | 35% | 75 ppm | 10.71 mL |
| Tool and tray cleaning | 2 L | 3% | 250 ppm | 16.67 mL |
Dose in mL = (Target ppm × Water volume in liters) ÷ (Stock strength % × 10)
Adjusted ppm = Target ppm × (Safety factor ÷ 100)
Total concentrate = Dose per batch × Batch count
This calculator uses the common gardening estimate that a 1% hydrogen peroxide solution is roughly equal to 10,000 ppm.
Hydrogen peroxide is often used in garden care because it breaks down into water and oxygen. Gardeners may use it for tray washing, tool cleanup, reservoir refreshes, and limited root-zone support. The amount matters. A weak mix may do very little. A strong mix may irritate roots, stress tender foliage, or waste product.
This calculator turns a target ppm into a measured concentrate volume. It accounts for stock strength, total water volume, and repeat batches. That helps with routine jobs in seed starting, container growing, greenhouse care, and small hydro systems. It also converts the result into teaspoons and fluid ounces, which is useful when lab tools are not nearby.
The dosing logic is simple. Stronger concentrate means less liquid is needed. Larger water volume means more concentrate is needed. The selected target ppm sets the final working strength. A light maintenance mix may stay low. A cleaning task may need a higher value. The safety factor lets you step down a plan before testing it on sensitive plants.
Gardeners commonly use peroxide planning for root-zone mixes, mild foliar test batches, tray sanitation, and reservoir resets. This page keeps the process organized. You can estimate one batch or several identical batches. You can also compare different product strengths without doing manual conversions every time.
Always read the label on the concentrate you buy. Commercial grades can be much stronger than household bottles. Start low when crops are young, stressed, or newly transplanted. Spot test before wider use. Avoid spraying in strong sun. Use clean measuring tools, wear hand and eye protection for stronger products, and keep written notes so future applications stay consistent and easier to repeat.
Many gardeners start low, often around 20 to 75 ppm for cautious testing. Cleaning work can go higher. Sensitive crops should always be tested first.
Yes. Enter the actual bottle strength. The calculator adjusts the required mL automatically. Stronger concentrates need more careful handling.
No. Higher doses can stress roots and leaves. Use only what matches the task. Start gently when plant tolerance is unknown.
The safety factor lowers the planned ppm. It helps when you want a softer first trial or when working with seedlings and delicate plants.
Yes. You can enter either unit. The script converts everything into liters for the calculation and shows both unit values in the result.
Yes, but use low ppm and test first. Spray during cooler hours. Avoid harsh sunlight and avoid broad use on tender foliage without trials.
It is an estimate for practical garden mixing. Bottle quality, product labeling, and real density can vary slightly between brands.
Fresh mixes are usually better. Hydrogen peroxide breaks down over time, especially when exposed to light, heat, or contamination.
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.