Concrete Slab or Driveway: calculators, shopping list & budget
Ready-mix is ordered by the cubic yard and short loads cost extra, so an accurate volume saves real money. A 20 x 20 slab at 4 in needs just under 5 yards before waste.
Use the concrete, rebar and gravel calculators here, then plan the pour day with the budget template.
Concrete Slab or Driveway budget & shopping list template
- • Printable PDF checklist with quantities, estimated prices and an "Actual" column
- • Editable Excel or Google Sheets budget that calculates totals automatically, including contingency and remaining funds
- • Step-by-step plan and notes page
Which calculators do I need for this project?
Step 1
Concrete Calculator
Estimate concrete for slabs, footings, columns and tubes. Free, instant, no signup.
Step 2
Rebar Calculator
Estimate rebar bars, linear feet and weight for any slab.
Step 3
Gravel Calculator
Estimate gravel by area and depth in tons or cubic yards.
Step 4
Concrete Footing Calculator
Estimate concrete for round or rectangular footings and piers.
How much does it cost?
400 sq ft slab, 4 in thick with thickened edges and rebar grid. Estimated total: $1,902, or $2,092 with a 10% contingency.
| Item | Qty | Est. cost |
|---|---|---|
| Ready-mix concrete | 5.5 cu yd | $908 |
| Short-load / delivery fee | 1 each | $100 |
| Crushed stone base | 7 tons | $294 |
| #4 rebar, 20 ft | 22 each | $286 |
| Rebar chairs, 50 pk | 2 packs | $36 |
| 2x4 form boards, 10 ft | 8 each | $48 |
| Stakes & duplex nails | 1 lot | $35 |
| Plate compactor rental | 1 day | $95 |
| Bull float & edger rental | 1 day | $40 |
| Curing compound, gallon | 2 gal | $60 |
Want this as a printable checklist and a self-totaling spreadsheet? Get the template.
What are the steps?
- Excavate and compact the subgrade.
- Spread and compact 4 in crushed stone.
- Set and level forms.
- Lay rebar on chairs at 18-24 in grid.
- Pour, screed, float and edge.
- Cut joints within 24 h and cure 7 days.
Material guides for this project
How many yards of concrete for a 20 x 20 slab?
At 4 in thick, about 4.94 cubic yards; order 5.5 to cover waste and uneven grade.
Do I need rebar in a driveway?
Rebar or wire mesh is strongly recommended for driveways to control cracking under vehicle loads.
When can I drive on new concrete?
Cars after about 7 days, heavy trucks after 28 days.
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