Home project planner
Plan the purchase before you start the project.
Estimate a starting quantity for paint, concrete, or gravel, account for waste openly, and print a shopping list you can take to the store or supplier.
Your estimate
Your shopping quantity will appear here.
Enter dimensions and product information to build a starting list.
Project estimate
Estimated purchase
Waste added
The shopping quantity rounds up to a whole purchasable unit after the waste allowance is applied.
Printable shopping list
| Item | Quantity | Price | Check |
|---|---|---|---|
| Material | □ | ||
| Other supplies | ________________________________ | □ | |
Learn mode
Waste is part of the plan, not a secret extra.
Waste accounts for cuts, spills, uneven surfaces, damaged pieces, mixing loss, compaction, touch-ups, and the small amount that cannot be used efficiently. The right allowance depends on the material and the project.
The planner first calculates the amount the measured space needs. It then multiplies that amount by 1 + the waste percentage. For 10% waste, that is 1.10. Only after that step does it round up to whole cans, bags, or tons.
Example: if a project needs 8.2 bags before waste, a 10% allowance makes 9.02 bags. You cannot buy 0.02 of a bag, so the shopping list rounds up to 10 bags. Check the product label and supplier guidance when the job, surface, or material makes the default allowance unsuitable.
Use the product’s numbers
Coverage, bag yield, and gravel density vary. Replace the defaults with the value on the product label or supplier specification whenever you have it.
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