Sprayer calibration, tank mixing rate help

Quick note on sprayer calibration (this trips a lot of people up):

If you’re tank mixing 3 different products, that are 200ml per 100 m² each then that’s a total of 600 ml per 100 m² of product.

Water volume doesn’t change the rate, it’s just the carrier.

What does matter is how much area your sprayer covers on a given setting, so calibration is key.

How to calibrate:
1. Fill your sprayer with water
2. Pick a setting if you have one
3. Spray a measured 100 m² area at your normal walking pace
4. Check exactly how much water you used

Example:
• If you use 5L over 100 m² → mix your 600 ml into 5L
• If you use 7L → mix your 600 ml into 7L

That way, when the tank is empty, you know you’ve applied the correct rate over that 100 m² area.

Obviously it’s not often a lawn is exactly 100 m², so a bit of maths is usually needed once you know your lawn area and your sprayer’s water output. Once you’ve added your lawns into the app, the rate calculator in the tools section will work out the product amount for you, so all you really need to do is the water calibration test.

Where people go wrong is assuming a fixed water amount per product rate, or even worse, using a ml per L approach with chemicals. It doesn’t work like that when tank mixing, the water just carries the product.

This is a very basic explanation. Some products will have minimum and maximum water volumes on the label that you need to follow, but as a general rule, this method will cover 90% of applications.

Any questions, fire them in the comments and I’ll try to answer them 👍