
The Coffee Mug Rule
How much rock salt to put down, measured with a coffee mug: one 12-ounce mug for a 20-foot driveway or ten sidewalk squares. Five steps, a mugs-by-area table and quick answers.
US Letter, 1 page · v1, November 2026
Link to it: calcbrite.com/get/coffee-mug-rule-flyer
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