Contact Sheet / Thumbnail Grid Calculator
Plan a thumbnail contact sheet: from thumb size, columns and count, get the rows and final sheet dimensions including gutters.
Contact sheets and storyboard montages need exact dimensions so they print or export cleanly. Given a thumb size and column count, this returns the row count and the total canvas including the outer and inter-cell gutters — feed it straight into your montage script or design grid.
Rule / Formula
Plan a thumbnail contact sheet: from thumb size, columns and count, get the rows and final sheet dimensions including gutters.
About Contact Sheet / Thumbnail Grid Calculator
Plan a thumbnail contact sheet: from thumb size, columns and count, get the rows and final sheet dimensions including gutters. Contact sheets and storyboard montages need exact dimensions so they print or export cleanly. Given a thumb size and column count, this returns the row count and the total canvas including the outer and inter-cell gutters — feed it straight into your montage script or design grid.
How to use Contact Sheet / Thumbnail Grid Calculator
- 1Enter your values into the fields in Contact Sheet / Thumbnail Grid Calculator.
- 2The result and any pass/fail verdict update instantly as you type — no button to press.
- 3Check the substituted formula and worked example to see exactly how the result was derived.
- 4Copy or note the result for your spec, delivery or planning.
Why use Contact Sheet / Thumbnail Grid Calculator?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: ImageMagick montage / contact-sheet conventions.
- ✓Shows the governing formula and a worked example, so you can trust and check every result.
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does Contact Sheet / Thumbnail Grid Calculator do?+
Plan a thumbnail contact sheet: from thumb size, columns and count, get the rows and final sheet dimensions including gutters. Contact sheets and storyboard montages need exact dimensions so they print or export cleanly.
Is my data private?+
Yes. Contact Sheet / Thumbnail Grid Calculator runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is Contact Sheet / Thumbnail Grid Calculator based on?+
It follows ImageMagick montage / contact-sheet conventions. Always confirm against the current official document, as specifications and rates can change.
What formula does it use?+
Contact Sheet / Thumbnail Grid Calculator uses: rows = ⌈count ÷ columns⌉; sheet = cols×thumb + (cols+1)×gutter (and likewise for height). The tool shows this formula with your own numbers substituted so you can verify the result.
Is Contact Sheet / Thumbnail Grid Calculator free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
Embed Contact Sheet / Thumbnail Grid Calculator on your website
Want Contact Sheet / Thumbnail Grid Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/contact-sheet-grid-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Contact Sheet / Thumbnail Grid Calculator — ToolJolt" loading="lazy"></iframe>Related Broadcast tools
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