Garden patio — worked example
Quantity takeoff
| Slab / zone | Dimensions | Count | Volume (ft³) |
|---|---|---|---|
| Rectangular patio | 12 × 10 ft × 4 in | 1 | 40 |
Each volume = length × width × depth converted to ft × count. Non-overlapping rectangles only. Required volume = geometric volume × (1 + allowance / 100). Displayed quantities are rounded to four decimals; ordering uses full precision.
Supplier A (example)
Round up the larger of 1.6296 yd³ required or 2 yd³ minimum, to a 0.25 yd³ order increment. 0.3704 yd³ is order surplus beyond the allowed requirement, not a second waste allowance.
Entered-price estimate · USD
| Cost item | Amount |
|---|---|
| Concrete material | USD 300.00 |
| Delivery | USD 60.00 |
| Other supplier fees | USD 0.00 |
| Labor · 3 hours × USD 40.00 | USD 120.00 |
| Other project costs (enter all applicable items) | USD 0.00 |
| Direct cost | USD 480.00 |
| Contingency · 0% of direct cost | USD 0.00 |
| Markup · 0% of cost including contingency (not margin) | USD 0.00 |
| Pre-tax subtotal | USD 480.00 |
| Entered tax · 0% · basis: none | USD 0.00 |
| Estimate total | USD 480.00 |
Money is rounded to two decimal places per cost line before totals. Tax is an entered assumption on no amount (tax calculation off). Prices are not live quotes.
Inclusions
Concrete quantity and the cost items explicitly listed. Prices and labor are invented examples, not market quotes.
Exclusions
Excavation, sub-base, reinforcement, formwork, pumping, finishing, curing, permits, inspections and other unlisted work. Enter any applicable costs before using this estimate.
Assumptions and checks
For quantity and cost planning only. Thickness is an input, not a design recommendation. Confirm dimensions, mix specification, access, supplier minimums, yield and local requirements before ordering.
Entered thickness is not a recommendation. Zero prices and zero tax are treated as zero, not as confirmed free supply or a tax exemption. No tax or engineering rules are inferred.