Firewood calculator

Estimate BTU output, fuel cost, seasoning time, and stacked volume. Results are approximate and depend on moisture, stack, and species.

BTU Output Calculator

Calculate the heat output of different firewood types.

Wood Type

Amount (cords)2

Home Size (sq ft)

Price per Cord ($)

Appliance Efficiency (%)75

Results

48,000,000

Total BTU

36,000,000

Effective BTU

$5.21

Cost per Million BTU

360

Est. Heating Days

Analysis

2 cords of Oak will provide approximately 36,000,000 BTU of effective heating energy at 75% efficiency. This should heat your 2,000 sq ft home for about 360 days under normal conditions.

Planning only — not a substitute for a professional heat-loss calculation. Values follow the same ballpark scale as FirewoodSuppliers.com.