How Many Bags of Pellets to Heat a 2,500 Square Foot House?

A 2,500 sq ft house heated only by a pellet stove takes about 286 bags of 40 lb (5.7 tons) for a winter in a moderate climate, with average insulation and a typical 80% stove. That is about 1.9 bags a day over a 150-day season and $2,002 at $7 a bag.

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Pellets for the winter

286 40 lb bags

5.7 tons

What to buy

In pallets (50 bags each)5.7 pallets
Bags per day, on average1.9 bags

In tons: 5.72 tons
In pallets (50 bags each): 5.7 pallets
Cost at your bag price$350.00 per ton: 2,002 dollars
Bags per day, on average: 1.9 bags
Heat to come from pellets: 75.0 million BTU

A rough planning estimate: winters, houses and burn habits differ. The kBTU per ft² climate figures and the insulation factors (0.8 well insulated, 1.25 poor) are rough planning values, not published standards. Most stoves use more in cold snaps and less in mild weeks. Buy a little extra, and keep pellets dry, off the floor and out of the damp.

Before you buy: round up to whole packs, check the size printed on the label, and add a little spare. Your supplier has the final say.

Pellets for 2,500 sq ft, by climate

Pellets as the only heat, average insulation, a typical 80% stove and pellets of about 8,200 BTU a pound. Bags are 40 lb, and the cost is at $7 a bag.

Climate	40 lb bags	Tons	Bags a day	Cost
Mild (15 kBTU per sq ft)	143	2.9	1.0	$1,001
Moderate (30 kBTU per sq ft)	286	5.7	1.9	$2,002
Cold (45 kBTU per sq ft)	429	8.6	2.9	$3,003
Very cold (60 kBTU per sq ft)	572	11.4	3.8	$4,004

By insulation, as the only heat or half of it

Bags for a winter in a moderate climate. Use the half column if a furnace or another heater does the rest.

Insulation	All the heat	Half the heat
Well insulated	229	115
Average	286	143
Poor or drafty	358	179

Pellets or firewood for this house?

Heating all 2,500 sq ft with wood instead, in the same moderate climate with an EPA-certified stove burning red oak, takes about 4.5 cords, a stack of about 571 cubic feet. With pellets it is 5.7 tons: 286 bags that stack on about 6 pallets.

Pellets feed themselves from a hopper and come dry and ready to burn; firewood has to be split, stacked and seasoned for months before it burns well. Compare the cost of each with your local prices in the heating cost comparison calculator.

These are planning estimates: the climate and insulation figures are rough values, and a stove burns more in a cold snap than on an average day. Buy a little extra and keep the bags dry and off the floor. For wood heat, see how much firewood to heat a 2,500 sq ft house.

Want to change anything else? The calculator above is the full How Many Pellets Do I Need for Winter?: edit any number and the results update instantly.

Tools & materials for this project

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Wood pellets (40 lb bags)Pellet stove ash vacuum Pellet stove glass cleaner Carbon monoxide alarm Pallet dolly or hand truck

Frequently asked questions

How many bags of pellets to heat a 2,500 sq ft house?

About 286 bags of 40 lb (5.7 tons) for a winter in a moderate climate, with average insulation, an 80% stove and pellets as the only heat. That is about 1.9 bags a day over 150 days.

How many bags of pellets a day for 2,500 sq ft?

About 1.9 bags on an average day of a 150-day season in a moderate climate, and 2.9 in a cold one. Cold snaps take more.

Pellets or firewood for a 2,500 sq ft house?

About 5.7 tons of pellets or 4.5 cords of red oak for the whole house in a moderate climate. Pellets are easier to handle; compare the cost with your local prices.

Related sizes and guides

Related sizes

Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.

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