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Chainsaw Chain Size, Pitch & Gauge Matrix Calculator

Match chainsaw chain pitch, bar gauge, and drive link counts to find exact replacement chain sizes and part numbers.

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Chainsaw Chain Size & Part Number Matrix

Match pitch, gauge, bar length, and common chain part numbers.

— Stihl Chain Series Code
— Oregon Part Number
— Estimated Drive Links

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All 12 Sawyer Engineering & Fuel Field Calculators

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Chain Length CalculatorGuide Bar & Drive LinksChain Speed CalculatorVelocity & RPMFuel Mix CalculatorGas & 2-Stroke OilMix Ratio CalculatorRatio Math & Risk MeterOil Mix CalculatorOil Ounces & BottlesStihl Fuel Mix CalculatorStihl 50:1 & HP UltraChainsaw Mix CalculatorQuick Field LookupChain Size CalculatorPitch, Gauge & Part #File Size CalculatorFile Diameter & AnglesPort Timing CalculatorEngine Modding & PortingCutting Speed CalculatorCutting Speed & FeedEngine Torque CalculatorTorque & HP
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Complete Field Engineering Guide

Complete Chainsaw Chain Size Specification & Part Number Matching Guide

Deciphering Chainsaw Chain Size Specifications

Selecting a replacement chain loop requires matching three distinct physical dimensions: Pitch, Gauge, and Drive Link Count (DL). If any one of these three dimensions is mismatched, the chain will either fail to mount on the guide bar, bind tightly in the bar groove, or slip off the drive sprocket during cutting.

This calculator decodes all major pitch and gauge combinations, providing exact cross-reference matching for Stihl, Oregon, Husqvarna, and Carlton chain series.

The Three Pillars of Chain Sizing

  1. Chain Pitch:
    • The average distance between any three consecutive rivets divided by two.
    • Common Pitches: 1/4" (0.250"), 3/8" Low Profile (Picco / Micro), .325", 3/8" Standard, and .404".
  2. Bar Rail Gauge:
    • The thickness of the drive link tang where it sits inside the guide bar groove.
    • Common Gauges: .043" (1.1mm), .050" (1.3mm), .058" (1.5mm), and .063" (1.6mm).
  3. Drive Link Count (DL):
    • The exact count of individual drive link teeth along the inner circumference of the closed loop.

Chain Pitch & Gauge Cross-Reference Matrix Table

Pitch Gauge Stihl Code Oregon Series Husqvarna Code Typical Saw Type
1/4" Micro .043" (1.1mm) 71 PM3 25AP H00 Battery Pole Pruners & Top Handle
3/8" Low Profile .043" (1.1mm) 61 PMM3 90PX H38 Small Electric & Battery Saws
3/8" Low Profile .050" (1.3mm) 63 PS3 / PM3 91VXL / 91PX H37 30cc – 45cc Gas Saws
.325" Standard .050" (1.3mm) 23 RM / RS 20BPX / 20LPX H23 / SP33G 45cc – 55cc Ranch/Farm Saws
.325" Standard .058" (1.5mm) 25 RM / RS 21BPX / 21LPX H25 Husqvarna / Jonsered Standard
.325" Standard .063" (1.6mm) 26 RM / RS 22BPX / 22LPX - Stihl Mid-Size Pro Saws
3/8" Standard .050" (1.3mm) 33 RS / RM 72LGX / 72EXL H42 / C83 50cc – 90cc West Coast Saws
3/8" Standard .058" (1.5mm) 35 RS / RM 73LGX / 73EXL H48 / C85 Husqvarna / Jonsered Pro Saws
3/8" Standard .063" (1.6mm) 36 RS / RM 75LGX / 75EXL - Stihl Professional Timber Saws
.404" Heavy .063" (1.6mm) 46 RS / RM 59L / 59AC H65 90cc – 120cc Stihl MS 881 / Harvesters

Cutter Types: Full Chisel vs Semi Chisel vs Rip Chain

  • Full Chisel (Square Corner): Features sharp 90° square cutter corners. Cuts softwood and clean timber at maximum speed, but dulls rapidly in dirty wood, frozen timber, or bark contaminated with sand.
  • Semi Chisel (Rounded Corner): Features a rounded cutter corner profile. Maintains its sharp edge significantly longer in dirty wood, frozen logs, or dry hardwood.
  • Rip Chain: Ground at a 10° top plate angle specifically for chainsaw milling (cutting parallel to wood grain).