Check Whether a Mat Opening Leaves Your Chosen Artwork Border
A mat opening only leaves a border when it is wider than the artwork. Divide the width difference between the two sides and check it against the margin you planned.
1 · artwork | art width mm | mat opening width mm
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Data note: Everything runs in this browser tab on the mat-window border gauge: your artwork | art width mm | mat opening width mm stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Perspective: Before: The frame does not define the visible mat opening. After: the mat-window border gauge shows the working beside each named row so the reader can change the assumption and inspect the consequence.
2 · Read the mat-window border gauge
Framing geometry only, not conservation, glazing, mounting or archival advice. Confirm the actual opening and overlap with the framer, and use conservation guidance for valuable or fragile work. The estimate cannot inspect a physical mat or the condition of the artwork.
Paid layer: mat-window border gauge print and history
one-time step · the free reading above stays complete
Free tier
- one complete mat-window border gauge run in the app
- three samples plus unlimited article-demo runs
- unwatermarked result text and an explicit, user-triggered state link
What $4 one-time adds
- print the mat-window border gauge with its row workings
- CSV of border mm per side and row explanations
- last five reading summaries saved in this browser profile
$4 once for repeated filing of the mat-window border gauge, not for a better answer. Illustrative time basis: avoiding one five-minute manual reformat per saved reading; no market-price or guaranteed-savings claim.
Local history (this device)
- No saved runs yet — your first run files here.
Checkout is unavailable until a payment link is configured. The optional unlock is browser-local, profile-scoped and best-effort, not server-verified access. Clearing browser data can remove it; there is no account or cross-device recovery.
Boundary and sources
Framing geometry only, not conservation, glazing, mounting or archival advice. Confirm the actual opening and overlap with the framer, and use conservation guidance for valuable or fragile work. The estimate cannot inspect a physical mat or the condition of the artwork.
- Method: the equation is stated next to the result and uses only quantities entered by the reader.
- All sample records are invented examples. No standard, tariff, product rate, schedule or policy is fetched or represented as verified.
- For any threshold or rule, use the current value from the provider, handbook or qualified professional responsible for it.
Mechanism: competence-autonomy-loop
Optional AI formatting, not calculation
For this mat-window border gauge, an external AI text tool may help format non-sensitive notes if you already use one. No AI service or account is required: manual entry completes the same free core calculation. Do not paste private or sensitive data. Review every value against the source before using it.
Format my non-sensitive notes for a mat-window border gauge. Return plain rows only: artwork | art width mm | mat opening width mm. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: artwork | art width mm | mat opening width mm. No AI response is executed as code.