Dilution Ratio & Mix It Right Every Time

It means one part product to N parts water — so 1:10 is one measure of concentrate added to ten measures of water, making eleven parts of mix in total. The product fraction is 1 ÷ (1 + N), so 1:10 is 1/11 ≈ 9.1% product. This calculator reads your ratio and turns it into millilitres per litre and a full batch breakdown.

The product fraction is 1 ÷ (1 + N) for a 1:N ratio, and ml of product per litre of mix = fraction × 1000. A 1:10 dilution is 1000 ÷ 11 ≈ 91 ml product per litre; a 1:100 dilution is 1000 ÷ 101 ≈ 9.9 ml per litre. The tool does this for you and scales it to whatever batch volume you enter.

In ratio mode you enter 1:N and the product is 1 part in (1 + N). In percent mode you enter the product as a straight percentage of the mix — so 5% means 50 ml of product per litre. Both arrive at a product fraction; pick whichever your label or recipe uses, and the tool gives the same per-litre and per-batch figures.

Product for the batch = total volume × product fraction, and water = total − product. For a 200 L batch at 1:50, the fraction is 1/51, so product ≈ 200 × 0.0196 ≈ 3.92 L and water ≈ 196.1 L. The tool shows both, plus the normalised ratio, so you can measure straight into the tank.

Sprayers usually hold a fixed tank volume, so the tool splits your batch into tanks and shows the product and water per tank. That way you measure the same dose into each fill rather than trying to divide one big batch — handy when you need several tank loads to cover the field and want every tank at the right strength.

Yes — it's general-purpose. Use it for foliar feeds, liquid fertiliser, surfactants, cleaning and sanitising concentrates, or any product sold as a concentrate to be mixed with water. The maths of parts-to-water is the same whatever the product; just enter the ratio or percent the label specifies.

Labels aren't always consistent. Some treat 1:10 as one part in ten parts total (10% product), others as one part product to ten parts water (1 in 11, ~9.1%). For dilute mixes the difference is tiny, but for strong ones it matters. Check what the manufacturer means, and use percent mode if the label states a percentage directly.

For most foliar feeds and cleaning a close approximation is fine, but for crop-protection chemicals follow the label rate precisely — too little is ineffective and risks resistance, too much risks crop damage, residues and exceeding legal limits. Measure the product with a marked jug or syringe rather than by eye, especially for low-dose concentrates.

The dilution factor is how many times the concentrate is diluted in the final mix — essentially (1 + N) for a 1:N ratio, or 1 ÷ product-fraction generally. A 1:50 dilution has a dilution factor of about 51, meaning the product ends up roughly 51 times weaker in the tank than in the bottle. It's a quick way to compare how strong two mixes are.

Yes — set the ratio or percent once and change only the batch volume, and the product, water and per-tank figures scale automatically. That lets you take a small trial mix up to a full field batch, or down to a knapsack load, without redoing the arithmetic or drifting off the intended strength.