PPM Spray Solution Calculator
Work out how much product to add to make a spray solution at a target ppm (e.g. growth regulators, micronutrients).
1 ppm = 1 mg per litre. To hit a target ppm with a product that isn't 100% active, divide by the active fraction. Used for growth regulators (e.g. GA₃, NAA), hormones and micronutrient sprays where doses are tiny and precision matters.
Always follow the product label — the label is the law. Verify doses, PHI and compatibility with the manufacturer and local regulations before spraying.
Spray operators and farmers use the free PPM Spray Solution Calculator for an accurate answer in seconds — no formulas to remember, works offline in the field.
About PPM Spray Solution Calculator
Plant growth regulators, rooting hormones and micronutrient sprays are dosed in parts per million (ppm) — tiny, precise amounts where a tenfold error ruins the crop or wastes costly product. Since 1 ppm equals 1 milligram per litre, this tool converts your target ppm and spray volume into the grams (or millilitres) of product to add, correcting for the active-ingredient percentage when the product isn't pure. Essential for GA₃, NAA, IBA and chelated micronutrient sprays.
How to use PPM Spray Solution Calculator
- 1Enter your sprayer/field values into the inputs.
- 2Read the headline result and the supporting breakdown.
- 3Apply the guidance in the note to your spraying.
Why use PPM Spray Solution Calculator?
- ✓Uses the standard, citable spray-calibration formula
- ✓Clear inputs with sensible defaults
- ✓Instant result with the working shown
- ✓Free, fully in-browser and private
Frequently asked questions
How do I make a spray solution of a certain ppm?+
1 ppm = 1 mg per litre, so for X ppm add X mg of active ingredient per litre. If the product is only, say, 90% active, divide by 0.9. This tool gives the total grams/millilitres for your tank.
What is ppm in spraying?+
Parts per million — milligrams of active ingredient per litre of water. It's used for very dilute, precise sprays like growth regulators and micronutrients, where percentages would be unwieldy (100 ppm = 0.01%).
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline in the field and your data never leaves the device.
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