Tack Fitting Calculator

Saddle and bridle sizing from horse measurements.

Wither height (hands)

Back length (in)

Shoulder angle (deg)

Gullet width (in)

Rider weight (lb)

Tab to move between fields

Seat size (in)

Tree (1=N, 2=M, 3=W, 4=XW)2

Max panel length (in)20

Bridle (0=Pony, 1=Full, 2=OS)1

Bit size (in)5.6

Max rider weight (lb)240

Tree SizeMedium

How to Use This Calculator

Enter Wither Height (hands), Back Length (in), and Shoulder Angle (deg).
Input Gullet Width (in) measured with a gullet gauge at the withers.
Enter Rider Weight (lbs) to confirm combined rider+saddle weight is under 20% of horse weight.
Review Seat Size (in) for the rider and Gullet Width Category (Narrow, Medium, Wide, X-Wide).
Use Tree Category and Seat Size to narrow saddle options before a trial fitting.

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