Calculator Hub
Free home improvement material calculators — instant bag, box, and gallon estimates with formulas shown. No signup.
Material calculators
How-to guides
- How Much Concrete Do I Need?Estimate cubic yards and bags for slabs, footings, and columns before you order or hit the store.
- How Deep Should Mulch Be?Recommended mulch depth for flower beds, trees, and weed control, plus how to convert depth to bags or yards.
- How Many Tiles Do I Need?Calculate tile count with the right waste factor for straight, diagonal, and cut-heavy layouts.
- How Much Paint for a Room?Estimate gallons from wall perimeter, height, coats, and paint coverage, with door and window deductions.
- How Much Paint for a 10x10 Room? (~2 Gallons)About 2 gallons for a 10x10 bedroom (two coats on walls). Door/window math, ceiling add-on, and free paint calculator.
- How Many Bags of Concrete for a 10x10 Slab?Exact bag counts for a 10x10 concrete slab at 4-inch and 6-inch thickness, including 10% waste.
- How Many Bags of Concrete for a 10x12 Slab?Exact bag counts for a 10x12 concrete slab at 4-inch and 6-inch thickness, including 10% waste.
- How Many Bags of Concrete for an 8x10 Slab? (~49 Bags @ 4 in)About 49 eighty-pound bags for an 8x10 slab at 4 inches, or 74 bags at 6 inches — includes 10% waste.
- How Much Mulch for a 10x10 Area? (9–13 Bags)9 bags at 2 inches, 13 bags at 3 inches for a 100 sq ft bed. Cubic yard totals and bag-vs-bulk tips.
- How Much Mulch for a 10x12 Area?Calculate bags or cubic yards of mulch for a 120 square foot garden bed at 2-inch and 3-inch depth.
- Concrete Bags vs Ready-Mix, Which Is Cheaper?Compare bagged concrete vs ready-mix delivery by volume, labor, and typical cost breakpoints.
- Mulch Bags vs Bulk Delivery, What to BuyWhen to buy bagged mulch vs a bulk truck delivery, volume math, minimum orders, and cost per cubic foot.
- 80 lb Bag Concrete Yield — Cubic Feet per BagAn 80 lb bag yields ~0.60 ft³; a 60 lb bag ~0.45 ft³. Bag counts for slabs plus 80 vs 60 lb comparison.
Explore
- How Much Concrete Do I Need?
- How Deep Should Mulch Be?
- How Many Tiles Do I Need?
- How Much Paint for a Room?
- How Much Paint for a 10x10 Room? (~2 Gallons)
- How Many Bags of Concrete for a 10x10 Slab?
- How Many Bags of Concrete for a 10x12 Slab?
- How Many Bags of Concrete for an 8x10 Slab? (~49 Bags @ 4 in)
- How Much Mulch for a 10x10 Area? (9–13 Bags)
- How Much Mulch for a 10x12 Area?
- Concrete Bags vs Ready-Mix, Which Is Cheaper?
- Mulch Bags vs Bulk Delivery, What to Buy
- 80 lb Bag Concrete Yield — Cubic Feet per Bag
- Methodology & sources
- Contractor Invoice MakerFree invoice & estimate PDFs for trades