Saw: Chainsaw & Fuel Mix Calc

What it does

Saw is the chainsaw companion. The fuel-mix calculator, the chain & file chart, and Cut Safe are free forever: 50:1/40:1/32:1/25:1 or custom ratios for any tank size in fluid ounces and millilitres (modern Stihl and Husqvarna equipment runs 50:1 — your manual is final), the Oregon-cited round-file size for every chain pitch, and OSHA's published kickback, starting, and PPE rules.

It also enforces the two fuel rules that quietly kill small engines, per OPEI: never above 10% ethanol, and never fuel older than about 30 days. The mix math works for every 2-stroke you own — trimmers, blowers, outboards, dirt bikes.

Saw Pro — one-time unlock

$6.99, once. Chain ID: measure across three rivets and Saw works out your pitch; add gauge and drive-link count and you have exactly the chain to buy. Chain tracker: every chain you own — which saw it fits, its exact spec, its sharpening log — with the honest rule that a chain retires at the wear mark on its cutters, not at a count. No subscription, no ads, no account.

Privacy

Saw collects nothing. No analytics, no accounts, no cloud — your chains live on your device. Privacy policy · Support