Convert Image Measurements With a Scale Bar
Image pixels become a physical measurement only through a valid scale reference. Use the bar embedded in each image instead of assuming the microscope magnification survives cropping and resizing.
1 · feature | measured feature pixels | scale-bar pixels
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 specimen graticule: your feature | measured feature pixels | scale-bar pixels stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Perspective: Before: Display resizing breaks a simple magnification-to-pixel assumption. After: the specimen graticule shows the working beside each named row so the reader can change the assumption and inspect the consequence.
2 · Read the specimen graticule
Educational measurement arithmetic only, not diagnostic image analysis. It cannot validate the scale bar, optics or specimen interpretation.
Paid layer: specimen graticule print and history
one-time step · the free reading above stays complete
Free tier
- one complete specimen graticule 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 specimen graticule with its row workings
- CSV of micrometres and row explanations
- last five reading summaries saved in this browser profile
$4 once for repeated filing of the specimen graticule, 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
Educational measurement arithmetic only, not diagnostic image analysis. It cannot validate the scale bar, optics or specimen interpretation.
- Method: Feature pixels divided by bar pixels, multiplied by labelled micrometres, gives length. The sample leaf cell is 84 divided by 200 times 100, or 42 micrometres.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-27, 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 specimen graticule, 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 specimen graticule. Return plain rows only: feature | measured feature pixels | scale-bar pixels. 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: feature | measured feature pixels | scale-bar pixels. No AI response is executed as code.