Concrete Formwork Calculator
Estimate selected formwork edges and stock-board purchases while keeping net contact, independent stock rounding, stake conventions and optional prices explicit.
Part of the Concrete & Masonry calculators — see all tools in this category.
Concrete formwork
Select the edges to form, then distinguish net contact and formed length from independently rounded stock-board purchases and optional costs.
Preparing calculator controls…
| Net formed length | 18 m |
|---|---|
| Contact area | 3.6 m² |
| Purchased board length | 24 m (8 boards) |
Current result
Purchase 8 whole formwork boards and 18 stakes.
- Net formed length
- 18 m
- Net contact area
- 3.6 m²
- Purchased board length
- 24 m
- Stake count
- 18
Net formed length and contact area measure only selected edges. Ordered boards are whole stock pieces: every selected run rounds up separately for every course, so purchased board length can exceed net length. No allowance or offcut reuse is assumed. Blank board or stake rates remain clearly incomplete price lines; zero is a valid entered price. Unselected edges, concrete, excavation, fastening, labour and delivery are outside this takeoff.
- Each formed run is rounded to whole boards independently; no offcut reuse or allowance is assumed.
- Stake counts use the entered maximum spacing and both-ends convention; this is not a structural design.
| Material | Net need | Order quantity |
|---|---|---|
| User-specified formwork board | 18 m (ordered) | 24 m (ordered) (8 packs) |
No prices entered
Cost breakdown
No prices entered. This is not a completed zero-cost estimate.
| Line | Purchased quantity / unit / basis | Pricing state | Direct price | Entered line tax |
|---|---|---|---|---|
| Formwork boards | 8 count (ordered) | Not priced | — | — |
| Formwork stakes | 18 count (ordered) | Not priced | — | — |
- Direct priced subtotal
- $0.00
- Selected contingency base
- $0.00
- Contingency rate
- 0%
- Contingency amount
- $0.00
- Before-tax total
- $0.00
- Entered line tax
- $0.00
- Contingency tax (not entered)
- $0.00
- Final total unavailable — enter a price to begin the estimate
- —
Missing price categories: Formwork boards, Formwork stakes.
Cost by category
No entered prices to chart.
| Category | Cost | State |
|---|---|---|
| Formwork boards | Not priced | not-priced |
| Formwork stakes | Not priced | not-priced |
How it works and assumptions
Enter every measured edge, select only the edges to form, then provide the actual board stock and course count. Each selected edge is rounded to full boards separately; entered stake spacing or a manual count stays explicit.
This is a quantity worksheet, not a formwork design. Continue with the live Specified Footing & Formwork Quantity Takeoff guide, then manually carry compatible board quantities to the Itemized Slab & Shed Base Estimate guide; neither guide transfers results or creates an exporter.
Worked example
The independent example below uses different dimensions from the C13 UAT rectangle, so it checks the rounding method without repeating the default layout.