Free Tools
Farm compliance calculators
we use ourselves.
Quick, free calculators for NVZ and Nutrients Action Programme checks — set up for Northern Ireland and England rules. No sign-up, and you can download a PDF for your records.
NVZ & Nutrients Action Programme
NVZ Compliance Check
A quick check of your nitrogen loading and slurry storage, with the key closed periods and storage rules.
Open calculatorLivestock Nitrogen Loading Calculator
Work out the nitrogen your livestock produce each year and check it against the 170 kg N/ha limit.
Open calculatorSlurry Storage Required Calculator
Estimate the slurry and farmyard manure your stock produce over the storage period you have to cover.
Open calculatorSlurry Tank Capacity Calculator
Measure the usable capacity of your slurry tanks and lagoons, allowing for freeboard and rainfall.
Open calculatorFertiliser & Nutrients
NI Fertiliser Limits Calculator
Check chemical nitrogen on grassland and cereals, and grassland phosphate by soil P index, against the NI limits.
Open calculatorSlurry & Manure Nutrient Value Calculator
The N, P₂O₅ and K₂O in your slurry, FYM, poultry manure or digestate — and what it is worth in bought fertiliser.
Open calculatorNeed more than a calculator?
We prepare nutrient management plans and NVZ compliance checks for farms and AD plants across Northern Ireland and the UK.