How Much to Buy

How much do you need to buy?

Free calculators that turn your measurements into bags, boxes, gallons and yards, before you drive to the store.

Build a shopping list as you go

Every calculator has an Add to project list button. A deck-and-patio weekend might need concrete, gravel and mulch: add each, type in local prices, and you get one list with a running total that you can print, copy or pull up on your phone in the store.

The list is saved in your browser only. No account, nothing uploaded.

Open my project list

Math you can check

Each calculator shows its formula, a worked example and the assumptions that matter, like bag yields and waste allowances. Measurements can be typed the way you’d say them: 12' 6", 150in or 3.8m.

Need a quick conversion? The bag and coverage chart shows bags per cubic yard and coverage by depth for common materials.