Field Tools

Manure Nutrient Calculator

Calculate N, P and K applied per hectare and acre from farmyard manure, compost or poultry litter. Enter application in tonnes or m³. Work backwards from a target rate.

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Manure Type & Nutrients

Select a preset from RB209 or choose Custom to enter your own analysis values. All values are kg per tonne of product.

Nutrient values (kg / tonne)

Total N

Total P₂O₅

Total K₂O

Avail N

Avail P

Avail K

Bulk Density (t / m³)

Used to convert between m³ and tonnes. Typical FYM: 0.7–0.9 t/m³. Poultry litter: 0.4–0.6 t/m³.

Presets sourced from AHDB RB209 (2024) via AgriOps reference data. Available values are calculated from RB209 percentages. For precise planning, use laboratory analysis.

Enter the total amount applied to a field to calculate the nutrients delivered per hectare and acre.

Field Size

Total Application

Enter a field size and total application above to see results.