Farrier Schedule Calculator
Calculate optimal farrier visit intervals from hoof growth rate, horse workload, and season.
Covers barefoot trims and shod horses for riding and competition.
Regular farrier visits are essential for equine hoof health. Hooves grow continuously, roughly 6 to 10 mm per month, and need trimming or reshoeing before they become overgrown, cracked, or unbalanced.
Base Schedule Formula: Visit Interval (weeks) = Max Hoof Length Tolerance / (Monthly Growth Rate / 4.33)
The tolerance is how much growth you can let past the ideal trim length before the balance of the foot suffers, and it runs from about 7 mm on a therapeutic case to 12 mm on a healthy bare foot.
Hoof Growth Rates by Factor:
| Factor | Growth Rate Modifier |
|---|---|
| Young horse (under 5) | +20% faster |
| Adult (5 to 20) | baseline |
| Senior horse (over 20) | -15% slower |
| Spring | +15% faster |
| Summer | +25% faster |
| Fall | -5% slower |
| Winter | -20% slower |
| High-protein diet | +15% faster |
| Biotin supplement | +10% faster |
Every one of those is an input on this page. Diet and biotin are combined into a single question because they stack, and a horse on both a high-protein ration and a biotin supplement grows hoof about 27% faster than one on neither.
Base Growth Rates:
- Average hoof growth: 8 mm/month (about 0.31 inches)
- Range: 5–12 mm/month depending on breed, age, nutrition, and season
Service Type Intervals:
Intervals below are for an adult horse on a standard ration, across the four seasons. A youngster or a horse on a rich ration and biotin grows faster and comes in sooner than the range shown.
| Service | Tolerance | Interval (adult, standard ration) |
|---|---|---|
| Barefoot trim | 12 mm | 5–8 weeks |
| Steel shoes (light work) | 10 mm | 4–6 weeks |
| Steel shoes (heavy work) | 8 mm | 3–5 weeks |
| Corrective shoeing | 7 mm | 3–4 weeks |
Shod horses come back sooner than barefoot ones, which surprises people who assume the shoe is doing the protecting. It is, but it is also nailed on. The hoof keeps growing underneath a shoe that cannot move with it, so the shoe drifts backwards relative to the foot and stops supporting the heel where it should. A bare foot has no such constraint and self-wears, which is why a healthy barefoot horse on decent ground can stretch to eight weeks in winter while a jumper in steel is back in three.
Worked Example: Adult horse, steel shoes in light work, summer:
- Base growth: 8 mm/month
- Summer modifier: ×1.25 → 10 mm/month
- Weekly growth: 10 / 4.33 = 2.31 mm/week
- Max overgrowth tolerance (light-work shoes): 10 mm
- Interval = 10 / 2.31 = 4.33 weeks → Schedule every 4 weeks
Cost Planning: At $150 per visit for full shoeing (all four hooves), a 4-week schedule costs about $1,950/year and a 6-week schedule about $1,300/year. Prices vary a lot by region and by whether the horse needs anything beyond a plain reset, so put your own figure in the calculator. Whatever the number, stretching the interval to save money is a false economy: a hoof left long enough to crack or go out of balance buys you a lameness workup, and that costs more than a year of trims.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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