Conversion formulae for breed: Jersey Conversion formulae for: United kingdom (on black & white base) 31-03-2026 Formulae for PRODUCTION milk yield : NLD = -2820.2584 + 2.6515 * GBR fat yield : NLD = -51.9793 + 2.5332 * GBR protein yield : NLD = -77.0781 + 2.5044 * GBR