Firewood Seasoning Calculator
Split wood is a promise the calendar has to keep: oak wants about 12 months, ash and pine are usable near 6, birch sits between. Enter your split date and species and this calculator returns the ready month, plus how many cords your stack holds from its length and height (a row 4 ft deep, the standard cord math of 128 cubic feet).
Firewood buying guides pretend seasoning is a detail; it is the whole product - wet wood burns half as hot and coats your stove in creosote. This page gives the species timelines, the stack-to-cord math, and the field tests that beat any date: grey cracked split faces, bark peeling off, a clack instead of a thud when two logs meet, and the hiss that means a wet log is burning your money.
How to use
- Enter your split date and species.
- Add stack length and height for the cord count.
- Read the ready month and check the signs before burning.
Frequently asked questions
How long does firewood take to season?
Split oak wants about 12 months; ash and pine are near 6; birch around 9. Splitting early matters more than species - a whole round seasons far slower than split pieces, so wood cut this spring burns this winter.
How can I tell if firewood is seasoned?
Look for grey, cracked split faces and loosening bark; knock two logs together - seasoned wood clacks, wet wood thuds; and if it hisses while burning, it is still wet and paying twice for the heat.
How many cords are in my stack?
One row 4 ft deep: multiply length by height by 4 feet and divide by 128 cubic feet - an 8-ft by 4-ft row is a quarter cord. The calculator does it from your stack measurements.
Should I cover my wood stack?
Cover the top only, and leave the sides open - wind pulls the moisture out, a full tarp traps it in. Stack off the ground on pallets or rails so the bottom row seasons too.