Turn a Measured Firewood Stack Into Seasons of Supply — Free
A woodpile is a volume; a winter is a consumption. Measure the stack's three dimensions once and the arithmetic tells you how many seasons it stands between you and an empty shed.
The proof surface
Storm-capture tools tally water coming in. This chart tallies fuel already stacked: length × height × depth per stack, summed, then divided by your supplied seasonal consumption with the remainder named. It does not model moisture, species or stove output.
InputStack code | length m | height m | depth m; season consumption (m³ of stacked wood)
Rare deviceStorm-capture tools tally water coming in. This chart tallies fuel already stacked: length × height × depth per stack, summed, then divided by your supplied seasonal consumption with the remainder named. It does not model moisture, species or stove output.
Output artifactStacked volume with row-by-row context
Cost$0 local calculation · no card, paid key, subscription or signup · proposed filing price is not for sale
Sample, not your facts: Illustrative inputs: South wall | 4 | 1.5 | 0.5; Corner | 2 | 1 | 0.5. Season consumption (m³ of stacked wood) = 6. Stacked volume: 4 m³ stacked. All records are invented.
Before using the stack-volume chart
Measure the stack itself — the rectangular envelope it actually occupies — not the wall or shed behind it, and use one unit convention (metres here) throughout. Air gaps inside the stack are included by design: consumption figures you compare against should be stacked-volume figures too, so the convention cancels. If your consumption history is quoted in loose volume, weight or 'loads', convert it to stacked cubic metres under one stated assumption before entry. The seasons figure is a ratio, not a forecast: an actual season's draw depends on weather, stove use and household habits that no geometry can know. Stacking safety, seasoning time and legal burning rules sit outside the chart entirely.
Why the flat version breaks
Measuring the shed instead of the stack
A shed's interior volume flatters any stack inside it, because air, access gaps and irregular walls are not wood. Measure the stack envelope itself; the difference between container volume and stack volume is exactly the error this tool is meant to remove.
Comparing loose and stacked measures
A cubic metre of split logs stacked is not a cubic metre thrown loose into a trailer, and suppliers quote both. Put stacked-volume numbers on both sides of the division — stack geometry here, stacked consumption in the setting — or the seasons figure is meaningless however precise the arithmetic.
Treating the ratio as a forecast
Two seasons of supply on paper can last one hard winter or three mild ones; the chart divides by your supplied constant and cannot see the weather. Use the number to time purchases and seasoning, and revisit it when real consumption data arrives.
How to work the stack-volume chart
Measure the rectangular envelope
Take the stack's length along its face, its height at the tallest settled point, and its depth from wall to front, all in metres. Where a stack leans or steps, either measure a conservative bounding box or split it into two rows; do not average a leaning stack into a taller one than it is.
Sum every stack you count on
Each row is one physically separate stack, and the chart sums them. Wood still in logs, on a trailer or unseasoned under cover belongs in the count only if you genuinely mean to burn it this cycle — decide the rule before measuring so the total means one thing.
Divide by your real consumption
Use last season's actual stacked-volume consumption if you have it; otherwise a deliberately conservative estimate. The chart treats this number as supplied truth and will faithfully divide by whatever you enter, so the assumption deserves the best figure you own.
Read seasons and remainder separately
Whole seasons are total ÷ consumption rounded down; the remainder is the wood left for the following partial season. A stack of 2.5 seasons is comfortable; 0.7 seasons is a top-up conversation with a supplier before prices climb. Pair the arithmetic with your own judgement about coming weather and drying time, and keep stacking safe and legal — the chart neither verifies either.
What the stack-volume chart separates
Question
Before
Inspect this instead
Measuring the shed instead of the stack
A shed's interior volume flatters any stack inside it, because air, access gaps and irregular walls are not wood. Measure the stack envelope itself; the difference between container volume and stack volume is exactly the error this tool is meant to remove.
Sum every stack you count on
Comparing loose and stacked measures
A cubic metre of split logs stacked is not a cubic metre thrown loose into a trailer, and suppliers quote both. Put stacked-volume numbers on both sides of the division — stack geometry here, stacked consumption in the setting — or the seasons figure is meaningless however precise the arithmetic.
Divide by your real consumption
Treating the ratio as a forecast
Two seasons of supply on paper can last one hard winter or three mild ones; the chart divides by your supplied constant and cannot see the weather. Use the number to time purchases and seasoning, and revisit it when real consumption data arrives.
Read seasons and remainder separately
This stack-volume chart replaces a manual count or calculation, not source verification or the responsible person’s review.
Run it on the samples, right here
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HYPOTHESIS / PROTOTYPE — checkout unavailable. Calculation is local. A draft is saved automatically in this browser profile when storage is available; Reset to sample clears it. Optional Pro history stores only five summaries and has its own deletion control. State links encode your inputs and can remain in browser history, clipboard or recipients’ records; share only non-sensitive rows. Optional external AI formatting leaves this device. The required site analytics beacon reports page activity; shared URLs contain encoded inputs. Do not treat an encoded URL as private. The calculator has no input-collection endpoint.
Volume arithmetic on reader-supplied dimensions and consumption only, not a heating, safety or purchasing guarantee. Check seasoning, appliance instructions and local burning rules with the relevant responsible sources before relying on any wood supply.
Data note: The stack-volume chart processes Stack code | length m | height m | depth m locally. Starter/sample selection and Run compute in this tab; no input is sent by the calculator. A local draft may be saved; explicit state-link sharing or optional external AI formatting can disclose inputs. Use non-sensitive labels.
Go deeper: the companion app files the same reading as a plotted bar chart sheet
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the stack-volume chart reading, and holds your drafts on this device — one complete free app run; the proposed $4 one-time filing layer is not for sale.
The stack-volume chart answer stays complete for free. The proposed $4 one-time filing layer adds row CSV, print and five local reading summaries, not hidden answers. Checkout is unavailable; the article demo remains unlimited.
Volume arithmetic on reader-supplied dimensions and consumption only, not a heating, safety or purchasing guarantee. Check seasoning, appliance instructions and local burning rules with the relevant responsible sources before relying on any wood supply.
What this is built on
Method: Use last season's actual stacked-volume consumption if you have it; otherwise a deliberately conservative estimate. The chart treats this number as supplied truth and will faithfully divide by whatever you enter, so the assumption deserves the best figure you own.
All sample records, dates, quantities and labels are invented. No outside policy, contract, rate, clock offset, measurement or accessibility standard is represented as verified.
Google’s official pricing documentation, fetched 2026-10-01, says AI Studio is free in available regions. Optional formatting may require a Google account; manual local entry requires none. Limits can change and free-tier content may be used to improve products. Do not send private records.
Before: the woodpile was reassurance measured by eye. After: it is cubic metres against a stated seasonal consumption, with seasons and remainder named.
Three worked readings, with different inputs
Sample A — typical inputs
South wall | 4 | 1.5 | 0.5
Corner | 2 | 1 | 0.5
Setting: Season consumption (m³ of stacked wood) = 6. Expected summary: 4 m³ stacked.
The south-wall stack is 4 × 1.5 × 0.5 = 3 m³; the corner stack is 2 × 1 × 0.5 = 1 m³. Stacked together that is 4 m³, and at the supplied 6 m³ season consumption the chart shows 4 ÷ 6 ≈ 0.667 of a season. Both rows fall under one season's supply and are marked accordingly — a prompt to think about topping up before cold weather, not a verdict on anyone's heating.
Sample B — changed plan
Big shed | 6 | 2 | 1
Setting: Season consumption (m³ of stacked wood) = 6. Expected summary: 12 m³ stacked.
A 6 × 2 × 1 m shed stack holds 12 m³, exactly two seasons at the supplied 6 m³ consumption. The equality is arithmetic, not a guarantee: real seasons vary, and consumption is your own supplied assumption rather than a model of any winter.
Sample C — boundary convention
Basket | 1 | 0.5 | 0.5
Setting: Season consumption (m³ of stacked wood) = 6. Expected summary: 0.25 m³ stacked.
A basket stack of 1 × 0.5 × 0.5 m holds a quarter cubic metre — visibly under one season at the supplied consumption, and flagged as such. The boundary case keeps small stacks honest in the chart instead of rounding them away; a quarter cubic metre of kindling stock is a real, if small, contribution.
Optional AI formatting, never the calculation
Manual entry completes this stack-volume chart for free without signup. If available to you, the free AI Studio interface linked in the sources may format fictional or non-sensitive notes; external access may require an account. No API key or AI call is built into this tool. Free-tier content may be used to improve products. Review each cell and transcribe it to the labeled row schema; do not paste the JSON object into the row box.
Format only these fictional or non-sensitive notes for a stack-volume chart. Return strict JSON shaped as {"rows": [{"label": "string", "cells": ["string", "string", "string"]}], "setting": "string"}. The columns are Stack code | length m | height m | depth m; the setting is Season consumption (m³ of stacked wood). Keep all supplied strings and quantities exactly; do not calculate, infer missing entries, invent dates or add advice. If any required value is missing, return an empty rows array and ask me for it separately. I will verify every cell against my source and manually transcribe rows using vertical bars before running the local calculator.
An AI response is not executed, fetched or trusted as a result. Missing values remain questions; the strict local parser checks the rows you actually enter.