Every crafter owns at least one: the diamond painting kit two rows in, the half-knitted sleeve, the resin molds still sealed in shrink-wrap. Unfinished projects are not neutral objects — home-organization psychology treats them as active emitters of guilt, radiating from wherever you stored them.
This calculator formalizes that radiation. It combines four measurable factors from the sunk-cost and clutter literature: money invested in materials, months of dormancy, the physical volume the project occupies against your personal Clutter Threshold (the point at which disorganization triggers spatial paralysis), and your remaining creative willpower after daily life takes its share.
The output is a Cumulative Guilt Score plus the thing no craft-drawer audit ever gives you: a clean verdict. Finish it, donate it, or perform a formal forgiveness — the model tells you which, because guilt without a decision is just interest paid on indecision.
The formula
C_sunk- Monetary sunk cost of materials for the project
M_dormant- Months since active work was last applied
V_storage- Physical volume the materials occupy
V_threshold- Your personal Clutter Threshold — tolerance before spatial anxiety triggers
W_willpower- Remaining willpower coefficient after daily depletion (0–1)
How it works, step by step
- Total the sunk cost — materials, tools bought “for this project,” and the course you took.
- Count dormant months since the last genuine working session (looking at it fondly does not count).
- Estimate the storage footprint and rate your clutter tolerance honestly.
- Rate your realistic weekly creative energy after work, family and life overhead.
- Read the verdict: the model weighs completion probability against guilt discharge from donation or formal forgiveness.
Worked examples
The diamond painting of Venice
$68 kit, 22 months dormant, 15% done, one shelf, clutter tolerance 3/10, energy 3/10, sentiment 4/10. Guilt: 71 — Actively radiating; completion odds 14%. Verdict: DONATE. The guilt-per-dollar ratio (1.04) means she has now paid for the kit twice — once in cash, once in feelings.
The heirloom quilt
$240 in fabric, 8 months dormant, 60% done, closet section, sentiment 10/10, energy 6/10. Guilt: 36 — Simmering, but completion odds 96%. Verdict: FINISH — high completion percentage plus real willpower makes this a scheduling problem, not a character flaw.
How to read your score
Frequently asked questions
Why do unfinished projects cause so much guilt?
Two mechanisms compound: the sunk-cost effect (abandoning feels like losing the money again) and the Zeigarnik effect (open tasks stay mentally active). Add physical visibility — the project literally watches you from the shelf — and you get a persistent, low-grade guilt emitter.
What is a Clutter Threshold?
A concept from home-organization psychology: the personal limit of visible disorganization beyond which people report spatial paralysis and anxiety. The calculator divides your storage footprint by this tolerance — the same bin weighs differently in a minimalist’s home than a maximalist’s.
Should I finish, donate, or toss my abandoned craft?
The verdict engine weighs completion probability (progress %, willpower, sentiment, dormancy) against guilt discharge. Rule of thumb from the model: past 18 months dormant and under 25% complete, donation beats completion in expected wellbeing for most inputs.
What is “formal forgiveness” of a project?
A deliberate retirement ritual: photograph the project, thank it for what it taught you, and release the materials. It closes the Zeigarnik loop nearly as effectively as finishing. Crafters report the drawer stops accusing them almost immediately.
Does buying craft supplies count as a hobby by itself?
The community joke — “collecting supplies is a separate hobby” — has real psychology behind it: acquisition delivers most of the dopamine, execution most of the effort. If your guilt scores keep landing high, audit the acquisition side, not your discipline.
Is my data saved?
No — the calculator, like your projects, retains nothing.