Milk Efficiency & Solids Calculator
A free milk solids calculator for UK dairy farmers. Enter your herd's yield, butterfat and protein to instantly calculate fat kg, protein kg, total milk solids and feed efficiency, benchmarked against Holstein, Jersey and crossbred targets.
The calculator below uses the standard formula (yield × butterfat %) + (yield × protein %) to give per-cow and herd-level totals, then compares your feed efficiency against typical breed benchmarks. Use it to spot-check a ration change, set a transition-cow target, or build the case for a deeper performance review.
Milk Solids Calculator
Your Herd Details
Milk Solids Output
Fat
Milk yield × butterfat %
1.20kg/cow/day
Protein
Milk yield × protein %
0.99kg/cow/day
Total Milk Solids
Fat + protein per cow
2.19kg/cow/day
Herd Total
Total solids × number of cows
438.0kg/day
ECM (4.2% BF / 3.3% Prot)
Energy corrected milk, standardised to 4.2% fat and 3.3% protein
29.3L/cow/day
Feed Efficiency
Milk Solids per kg DMI
0.100
Holstein benchmark: Good ≥ 0.115 · AVG ≥ 0.1
Feed Efficiency (litres/kg DMI)
1.36
Holstein benchmark: Good ≥ 1.55 · AVG ≥ 1.4
Want to improve these numbers?
A ration & performance review can identify opportunities to improve feed efficiency and milk solids output on your farm.
Book a Ration & Performance Review