How Much Firewood Do I Need for Winter?

How much firewood do I need for winter? Most UK households need 2 to 6 cubic metres depending on usage. Occasional users need 1.5 to 2 m³, regular users need 3 to 4 m³, and those relying on wood as a primary heat source need 6 to 8 m³ or more across October to March.

Running out of firewood in January is not a comfortable situation. Whether you are asking how much firewood do I need for winter for the first time or restocking before the season begins, getting the quantity right matters. This guide covers every relevant factor, a five-step personal calculator, a month-by-month usage breakdown, and a storage guide for the 2026-27 season.

What Determines How Much Firewood You Need?

The right amount of firewood for winter varies significantly between households. Four key variables account for most of the difference, and understanding each one will sharpen your estimate considerably.

How Often You Burn

Frequency is the single biggest driver of consumption. A household burning a few evenings a week will use far less wood over a season than one running the stove for six to eight hours every day. Most UK households fall somewhere in between, using a log burner as supplementary heating on weekday evenings and more heavily at weekends. If you are unsure of your own pattern, tracking how many logs you add per session over a typical week gives you a reliable baseline.

Your Stove or Fireplace Type

A modern Ecodesign-certified wood-burning stove operates at 75 to 85% efficiency, extracting far more heat from each log than an open fireplace, which typically runs at around 20 to 30% efficiency. The practical result is substantial: open fireplace owners often need one to two cubic metres per month during heavy use, while a well-matched log burner running at the same frequency uses considerably less. If your log burner is not getting hot enough, fuel efficiency may be lower than expected, which pushes your seasonal consumption higher.

The Size and Insulation of Your Home

A well-insulated modern home retains heat between burns, reducing the number of logs needed per session. An older, draughty property with poor loft insulation and single glazing loses heat quickly and requires the stove to work harder for longer. As a rough guide, a 50 to 70 square metre room with average insulation uses around one cubic metre per month during regular winter burning. Open-plan spaces with high ceilings or exposed stone walls can easily double that figure.

The Type of Wood You Burn

Dense hardwoods such as oak, ash and beech produce significantly more heat per log than lighter softwoods. Whether oak is good firewood for your specific stove matters here: a well-dried oak log of comparable size on a good ember bed will generally outlast softwood of equivalent weight. Moisture content has an even greater effect than species: wood above 20% wastes combustion energy evaporating water rather than producing usable heat. Knowing what wood you should not burn helps you avoid the most common stocking mistakes before winter arrives. The type of wood you choose directly affects how much of it you need for a comfortable season.

Quick Reference: Firewood by Usage Type

The table below gives a practical starting point for estimating how much firewood you need for winter across the most common usage patterns in a typical UK home.

Most UK households using a wood burner for supplementary heating need 3 to 4 cubic metres across the winter. How much wood do you need for winter as your primary heat source is substantially higher: plan for 6 to 8 m³ or more before the season starts. Occasional users can typically work from 1.5 to 2 m³.

Your 5-Step Personal Firewood Calculator

Generic estimates are useful as a starting point, but they will not reflect your specific stove, home or habits. This five-step method produces a far more accurate figure for how much firewood you need for winter.

Step 1 - Estimate Your Weekly Log Use

Count how many logs you add per burning session and how many sessions you have per week. A standard log burner session of three to four hours at moderate output burns roughly four to six medium hardwood logs. Running the stove all day at weekends adds another six to ten logs per day on top of weekday evening use.

Step 2 - Multiply by the Number of Burning Weeks

The UK heating season typically runs from October to late March, which is approximately 24 weeks. Most households do not burn at full rate throughout the entire period. A working estimate of 20 to 22 active burning weeks covers the typical pattern for a household using wood as supplementary heating rather than a sole heat source.

Step 3 - Add a 15 to 20% Cold Snap Buffer

UK winters are unpredictable. A sharp cold spell in February can push consumption well above your weekly average within a few days. Adding at least 15% to your calculated total protects against this. Running short mid-season is both uncomfortable and, during cold spells, likely to mean paying premium prices for an emergency delivery.

Step 4 - Convert to Cubic Metres or Bulk Bags

One standard bulk bag kiln dried logs holds approximately 0.5 to 0.9 cubic metres of loose logs, and one cubic metre crate holds around 1 m³. To illustrate how the steps connect: if you burn around 5 logs per session on 6 evenings a week, that is approximately 30 logs per week. Over 22 burning weeks, that gives around 660 logs before any buffer is added. At an approximate rate of 200 to 250 medium logs per cubic metre of kiln-dried hardwood, this places the household at around 2.6 to 3.3 m³, consistent with a 3 to 4 m³ order once the 15% buffer from Step 3 is applied. Log sizes and stacking density vary between suppliers, so treat this as a working estimate.

Step 5 - Factor in Kiln-Dried Efficiency

If you are using properly kiln dried hardwood, moisture content affects how efficiently firewood burns. Rather than applying a fixed reduction to your estimated volume, compare the moisture content, log size and stated volume of the wood you buy. Properly seasoned wood that reaches a similar moisture level can perform comparably to kiln-dried wood under similar burning conditions. The figures from Steps 1 to 4 give you a solid base to refine over your first season.

Month-by-Month Winter Firewood Breakdown (October to March)

Understanding when your consumption peaks lets you order smartly and avoid running low at the worst possible time. The figures below are illustrative estimates for a typical UK household using a log burner as supplementary heating, with total seasonal consumption of approximately 3.3 to 4.9 m³. Usage varies with your home, stove and how cold each individual winter turns out to be.

December and January tend to be the two months of highest consumption for most UK households, with usage noticeably higher than October or March. Having your full stock in place before November reduces the risk of running short during the coldest periods. March usage varies considerably between years, and a small buffer here is rarely wasted.

When to Order and How Much to Keep in Stock

Ordering firewood in late summer gives you more time to arrange delivery and prepare suitable storage before colder weather arrives. Availability and delivery times vary by supplier, so check current options before placing your order. If you intend to keep a wood stove burning all night during the coldest weeks, build this into your January estimate, as overnight burning adds a significant amount to your weekly total.

Plan ahead and order from Kiln Dried Logs before the season begins.

Why Kiln-Dried Logs Mean You Need Less

Moisture content is the most misunderstood variable when asking how much wood do I need for winter. Volume alone does not tell the full story.

Moisture Content and Heat Output

Wood above 20% moisture burns less efficiently because combustion energy is spent evaporating water before it can produce usable heat. At higher moisture levels, the result is a smokier, cooler fire that requires more wood to achieve the same warmth. In England, wood sold in volumes under 2 m³ must carry Ready to Burn certification confirming moisture content at or below the legal standard. Logs above this threshold burn less cleanly and produce more deposits in the flue, increasing chimney maintenance costs over time.

How Much Less Kiln-Dried Wood Do You Actually Need?

The practical implication is that moisture content, not just volume, determines the value you get from each delivery. Kiln-dried hardwood dried to below 20% moisture gives you more usable heat per log because less energy is lost to evaporation. Well-stored seasoned wood that reaches a similar moisture level can perform comparably, so the key variable is moisture at the point of burning rather than the drying method alone. Buying from a supplier with Ready to Burn certification removes the guesswork, and the efficiency gain over poorly dried alternatives often offsets the higher unit price across a full season.

How Much Storage Space Do You Need?

Knowing how much firewood you need for winter is only useful if you have somewhere to put it. Storage is a practical detail most firewood guides overlook entirely.

Allow an extra 20% of space beyond your calculated volume to accommodate airflow and ease of access. Logs need to breathe to stay dry, particularly in UK autumn conditions. A covered log store with open sides, raised off the ground on a pallet or treated timber base, is the most practical solution for most UK households and keeps kiln-dried logs in good condition right through to March.

FAQ: How Much Firewood Do I Need for Winter?

How much firewood do I need for a wood-burning stove for winter?

Most UK households using a wood burner for supplementary heat need 3 to 4 cubic metres across the winter. Occasional users need 1.5 to 2 m³. Those using wood as their primary heat source should plan for 6 to 8 m³ or more.

How many logs do I need for winter?

How many logs do I need for winter depends on session frequency and log size. As a ballpark, regular evening use across the UK heating season burns through roughly 1,500 to 2,000 medium hardwood logs.

How much wood do you need for winter if it is your only heat source?

Households relying entirely on wood for heating typically need 6 to 8 cubic metres or more for a full UK winter. Home size, insulation quality and daily burn hours all shift the final figure, sometimes considerably.

Is it cheaper to buy kiln-dried or seasoned logs for winter?

Kiln-dried logs typically cost more per cubic metre than unseasoned alternatives. The difference in volume needed depends on the actual moisture content of what you buy. Ready to Burn certification confirms the firewood meets the moisture standard for efficient burning.

When should I order firewood for winter in the UK?

Order in August or September for the best availability and prices. Waiting until October means competing with the seasonal rush, and mid-season top-ups during cold spells often cost more. One full-season delivery is the most economical approach.

Plan Your Firewood Supply for Winter

Getting the quantity right comes down to knowing your own burning pattern, your stove's efficiency and the quality of the wood itself. Use the five-step calculator to work out how much firewood you need for winter, then add 15% as a buffer for cold snaps. Order before October, store with adequate airflow, and you will be well prepared come January.