Sprayer Calibration & Application Calculator
Learn to calibrate your sprayer and calculate precise application rates
Before using any chemicals, you must first calibrate your sprayer with water only!
1. Fill with Water
Fill your sprayer with a known amount of water (e.g., 2 litres) and note the starting volume.
2. Mark Test Area
Mark out a test area (e.g., 5m × 5m = 25m²) using measuring tape or count your paces.
3. Spray at Normal Pace
Walk at your normal, comfortable pace while spraying the test area evenly.
4. Measure Remaining Water
After spraying, measure how much water is left in your tank. The difference is your application rate.
Consistent Pace
Always walk at the same speed you used during calibration. Count your steps or use a consistent rhythm.
Weather Conditions
Apply when wind is less than 15 km/h. Avoid hot, sunny conditions that cause rapid evaporation.
Even Coverage
Overlap spray patterns by 10-20% to ensure no gaps. Use a systematic pattern across your area.
Fresh Mixing
Mix only what you need for each session. Some chemicals lose effectiveness when stored mixed (and may damage your sprayer). Flush thoroughly after use.