Check Sign Letter Height Against Viewing Distance
A sign that reads at the counter can vanish at the door. Apply your chosen height-per-distance factor to each viewing distance and see the shortfall in millimetres before the sign is made.
1 · sign | viewing distance m | letter height 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 height sighting rule: your sign | viewing distance m | letter height mm stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Perspective: Before: The failure mode is distance, not the artwork on screen. After: the height sighting rule shows the working beside each named row so the reader can change the assumption and inspect the consequence.
2 · Read the height sighting rule
Planning arithmetic using a factor you supply. Not a signage standard, code compliance or a legibility guarantee; verify with the relevant guidance and test in place with real readers.
Paid layer: height sighting rule print and history
one-time step · the free reading above stays complete
Free tier
- one complete height sighting rule 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 height sighting rule with its row workings
- CSV of mm short and row explanations
- last five reading summaries saved in this browser profile
$4 once for repeated filing of the height sighting rule, 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
Planning arithmetic using a factor you supply. Not a signage standard, code compliance or a legibility guarantee; verify with the relevant guidance and test in place with real readers.
- Method: Eight metres at 25 mm per metre needs 200 mm; the directory has 150, so it is 50 mm short and flagged. The room number needs 50 and has 60 — no shortfall.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-28, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Mechanism: competence-autonomy-loop
Optional AI formatting, not calculation
For this height sighting rule, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a height sighting rule. Return plain rows only: sign | viewing distance m | letter height 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: sign | viewing distance m | letter height mm. No AI response is executed as code.