The short answer
Why use Sensor Compare?
A calculator turns known inputs into a repeatable answer and shows which assumptions you supplied. That is safer than relying on a rule of thumb you cannot audit.
Sensor Compare focuses on calculating sensor compare from values you enter. The result is calculated in JavaScript from the values shown beside the tool. It is an estimate for planning, not a substitute for physical calibration or manufacturer data.
No source file is needed. Values stay in this browser tab. Check units before trusting the result. A plausible answer can still be wrong when millimeters, inches, pixels, or percentages are mixed.
What Sensor Compare does
Enter the known values
Sensor Compare does not need a photo. You type values (or grant a device permission) and the result is drawn in this tab. Nothing is uploaded.
Run the formula
Sensor Compare is for calculating sensor compare from values you enter. The preview is the place to decide if the setting went too far. The original file is not overwritten.
Useful controls
Main controls: Named numeric inputs for the selected formula. Working limit: No upload is required; input ranges are constrained to practical browser values. Watch the preview at full size before you save. A current desktop browser usually has more memory than a phone.
Read the answer
Leave with an immediate numeric result and supporting values. Generate again if the first pass is wrong. Nothing is stored after you close the tab.
Where Sensor Compare fits
These are ordinary jobs where the focused controls save time. They also show where a full editor or a manual review may still be the better choice.
Shoot planning
Estimate optical or sensor relationships before setting up equipment.
Print planning
Convert pixels, coverage, area, or time into a working material estimate.
What-if checks
Change one Sensor Compare input and see how the result moves.
Start to finish
How to use Sensor Compare
- 01Enter the values requested by Sensor Compare.
- 02Generate the result and read the preview at its intended size.
- 03Download, copy, or print the finished result.
What to expect from Sensor Compare
This table covers the parts that matter before you begin: what goes in, which controls do the work, what comes out, and where the browser draws a hard line.
| Check | What it means here |
|---|---|
| Supported input | No upload required |
| Main controls | Named numeric inputs for the selected formula |
| Output | An immediate numeric result and supporting values |
| Working limit | No upload is required; input ranges are constrained to practical browser values |
| Privacy | Files and entered values stay in this tab. Filenames, pixels, metadata, OCR text, QR contents, locations, and passwords are not sent to analytics. |
Before you export
- Confirm every unit before entering a value.
- Keep more precision during calculation than you need in the final answer.
- Compare estimates with manufacturer specifications where available.
- Leave a real-world calibration margin for ink, print, and production work.
Frequently asked questions
If you cannot find what you are looking for, write us a message and we will get back to you.
What should I check before saving with Sensor Compare?
Does my file get uploaded?
Can I use Sensor Compare on a phone?
Will Sensor Compare overwrite my original file?
Why might the Sensor Compare result look different in another app?
Is Sensor Compare free to use?
How does Sensor Compare work?
What can I put into Sensor Compare?
How do I save the result from Sensor Compare?
Why did Sensor Compare fail or look wrong?
Will Sensor Compare keep a copy of my work?
Related tools
More in Photography Calculators.
Continue the workflow
These tools handle common next steps after sensor compare.