FREE TOOL / COFFEE STOCK

Know what the next bag needs to cover.

Estimate dry coffee mass from your own preparation size and routine. Account for what you already have before rounding to whole bags.

Example inputs, not a recipe or consumption recommendation. This estimates coffee mass and optional bean-only cost, not freshness, caffeine intake or total equipment ownership cost.

The calculator needs JavaScript. Manual method: grams per preparation × preparations per day × days, plus any allowance; subtract existing stock and divide the remaining mass by bag mass, rounding up to whole bags.

ESTIMATED PURCHASE / YOUR SCENARIO

Enter your routine

An estimate, not an order or subscription. Entries remain in this tab and are not saved automatically.

The arithmetic, without the hidden extras

Mass and whole bags

Daily mass = entered dose × average preparations × (1 + optional extra percentage ÷ 100). Multiply by days, subtract existing stock, and round any positive remaining need up to whole bags. If existing stock covers the plan, zero new bags are needed.

What an ounce means here

One avoirdupois ounce is 28.349523125 grams. Fluid ounces are volume units and are not accepted as coffee mass. NIST conversion tables. Duration assumes the same average use throughout; it does not assess coffee freshness.

Optional costs

Bean cost per preparation uses your dose, extra allowance and bag price per gram. New-bag cost = whole bags × entered price. Neither includes equipment, energy, water, filters, other ingredients, repairs or your time. A blank price means unknown, not free.