Tool
Wagyu content calculator.
Pick the sire and dam and see the Wagyu percentage and F-grade of their progeny — from an F1 cross up to a Fullblood.
Progeny Wagyu content = (sire + dam) ÷ 2. Registry grade thresholds can vary slightly; a small non-Wagyu founder means Purebred rather than Fullblood.
How breeding up works
Crossbreeding builds Wagyu content one generation at a time. Each mating to a Fullblood roughly halves the remaining non-Wagyu share: 50% at F1, 75% at F2, 87.5% at F3, and 93.75% at F4 — the point at which an animal can be registered Purebred. For the full picture see Fullblood, Purebred and Crossbred explained and F1 Wagyu explained.
Frequently asked questions
How is Wagyu percentage calculated?
A calf's Wagyu content is the average of its sire's and dam's Wagyu percentages. A Fullblood (100%) over a non-Wagyu cow (0%) gives an F1 at 50%; a Fullblood over an F1 gives an F2 at 75%, and so on.
What is the difference between Purebred and Fullblood?
Fullblood Wagyu trace 100% to Japanese Wagyu with no other breed. Purebred are bred up to a high Wagyu percentage — commonly 93.75% (F4) or above — and registered as such, but carry a non-Wagyu founder somewhere in the pedigree.
What grade is a Wagyu-Angus cross?
A Fullblood Wagyu bull over an Angus cow produces an F1, about 50% Wagyu. Joining a Wagyu bull back over that F1 female gives an F2 at about 75%.