NVZ & Compliance Tools
Free, RB209-accurate calculators used by thousands of UK farmers to stay legal and avoid fines.
Slurry Storage Calculator
5 or 6 month NVZ rule – instant minimum storage requirement in m³ & UK gallons + free PDF report
Slurry & Manure N+P Calculator
RB209 accurate nutrient production from all livestock types – essential for NVZ records
Livestock Stocking Rate Calculator
Instant LU/ha calculation – stay compliant with 170 kg N/ha limit & grassland derogation
NVZ Compliance Checker 2025/26
170 or 250 kg/ha derogation checker – instant pass/fail result with landscape PDF report
Slurry Tank Capacity Calculator
Calculate actual vs available tank capacity including freeboard & rainfall – SSAFO/NVZ compliant
Dirty Water Storage Calculator
Calculate how many m³ and gallons of dirty yard water you need to store each year
More compliance, record-keeping and dirty water tools coming in 2026
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