What's My Grind

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Start analyzing your coffee grind size

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This is an estimate, not a laboratory measurement. Results vary with your phone's camera, lighting, and setup. Use them as a guide to compare and dial in your grind — not as an exact figure.

Use the same phone every time. Different cameras read slightly differently, so once you find your sweet spot (say espresso at 400µm), keep calibrating other grinders with that same device for comparable results.

I understand that What's My Grind provides estimated grind measurements that vary by device and conditions, and are meant as a guide rather than an exact figure.

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