Can I size down to save money?

Yes, as long as your 80th-percentile branch is within the chipper's real-world capacity. The mistake is sizing down to your 50th-percentile branch — then you spend half your chipping time cutting larger branches down before feeding them.

Should I size up for future-proofing?

Only if you're likely to expand your property or take on heavier work. A 6-inch chipper does 6-inch work faster and more reliably than a 4-inch chipper forced to its limit, but an 8-inch chipper is overkill for a suburban yard and costs more to run.

What's the biggest factor beyond size?

Feed type. A 6-inch hydraulic-feed chipper can outperform a 7-inch mechanical-feed chipper on messy brush because the hydraulic feed handles forks and crooked wood. Size matters, but feed matters more once you're past the minimum capacity.

Buying guide

What size woodchipper do I need?

Chipper sizing rules by property acreage and branch diameter. Size to your typical branches, not your peak branches.

By Chip It Right editorialUpdated April 15, 2026

The single biggest mistake is buying to the occasional 8-inch log instead of the everyday 4-inch branch. Size up just slightly from your 80th-percentile branch — not to your absolute maximum.

By property size

Under 1 acre (suburban yard): 4-inch gas or electric. Your typical material is pruning debris under 2 inches. A MechMaxx GS650 or Woodmaxx DC-1260 is plenty.
1–5 acres (hobby farm): 4–6 inch. Occasional storm cleanup will push toward 6-inch capacity. The MechMaxx B150 or Woodmaxx MX-8500G+ (PTO) work well.
5–20 acres (small rural property): 6–8 inch. Real brush cleanup, multiple tree species, occasional 7–8 inch material. The Woodmaxx MX-8600 (PTO) or MechMaxx DCH7 (gas) are sized for this.
20+ acres (woodland/homestead):8-inch hydraulic feed. Woodmaxx WM-8H, MX-8800, or Woodland Mills WC88. Hydraulic feed matters here because you’ll deal with forked, crooked material.
Commercial use (tree service, landscape crew): 9+ inch commercial tow-behind (Bandit, Vermeer) or Woodmaxx MX-9900 for PTO.

By branch diameter (the real sizing rule)

80th-percentile branch ≤ 2 inches → 4-inch rated chipper.
80th-percentile branch 3–5 inches → 6-inch rated chipper.
80th-percentile branch 5–7 inches → 8-inch rated chipper.
80th-percentile branch 7–9 inches → 9 or 10-inch commercial chipper.

FAQ03 questions

Frequently asked questions

Can I size down to save money?: Yes, as long as your 80th-percentile branch is within the chipper's real-world capacity. The mistake is sizing down to your 50th-percentile branch — then you spend half your chipping time cutting larger branches down before feeding them.
Should I size up for future-proofing?: Only if you're likely to expand your property or take on heavier work. A 6-inch chipper does 6-inch work faster and more reliably than a 4-inch chipper forced to its limit, but an 8-inch chipper is overkill for a suburban yard and costs more to run.
What's the biggest factor beyond size?: Feed type. A 6-inch hydraulic-feed chipper can outperform a 7-inch mechanical-feed chipper on messy brush because the hydraulic feed handles forks and crooked wood. Size matters, but feed matters more once you're past the minimum capacity.