Foundation Percentage Matters
Foundation Quarter Horse percentage is a pedigree estimate. It helps breeders compare horses with early stock influence. The number is not a show score. It is a weighted view of recorded ancestry. A higher value usually means more ancestry traces to approved foundation lines. A lower value may still describe a useful horse. Performance, health, structure, and temperament still matter.
Understanding the Pedigree Math
Each parent gives half of the foal's pedigree. A sire listed at 90 percent and a dam listed at 80 percent produce an estimated 85 percent foal. Grandparents can also be weighted. Each grandparent contributes one quarter. Older generations receive smaller shares. This calculator keeps that idea simple. It accepts parent values, grandparent values, and traced ancestor counts. You can compare the methods without rebuilding the whole pedigree by hand.
Using Results With Care
Registry rules can differ. Some groups require a minimum percentage. Others review specific ancestor names. This tool provides planning numbers only. Always check the registry, association, or breeder record before filing paperwork. Unknown pedigree spaces can change the estimate. Count unknown ancestors as zero for a strict review. Ignore unknowns when you only want a known-line estimate. Use breed average when you need a practical planning assumption.
Better Breeding Records
Good notes make the percentage more useful. Record sire values, dam values, source documents, and calculation dates. Keep copies of registration papers. Save each report as a file for later comparison. The CSV export is helpful for spreadsheets. The PDF report is helpful for printing, sharing, or attaching to a horse file.
Practical Decisions
A percentage should support judgment, not replace it. Compare the estimate with conformation, genetic soundness, training goals, and market needs. A balanced plan protects quality across generations. This calculator gives a clear starting point. It also shows how the final value was produced. That makes each breeding discussion easier, faster, and more transparent.
Why Options Help
Pedigrees are rarely perfect. Some owners know only parents. Others have detailed grandparent records. A flexible worksheet lets both users work from available evidence. It also reveals how missing entries affect the final figure. That transparency reduces mistakes and supports fair comparisons between several horses during breeding review.