Construction Calculator Feet & Inches
For decks, slabs, lumber, and fill – with cost by year & waste graph.
📐 advanced estimator · ft/in · with graph
📋 results
📊 cost comparison
material standards (USA / international)
📏 lumber dimensions: nominal vs. actual (inches)
| nominal | actual (dry) | use case |
|---|---|---|
| 1×4 | ¾″ × 3½″ | furring, boxes |
| 2×4 | 1½″ × 3½″ | wall framing |
| 2×6 | 1½″ × 5½″ | deck joists |
| 4×4 | 3½″ × 3½″ | posts |
🧱 standard concrete mix (cement : sand : gravel)
| mix type | ratio | typical psi |
|---|---|---|
| general purpose | 1 : 2 : 3 | 3500 |
| high‑strength | 1 : 1.5 : 2.5 | 4500+ |
| sidewalk / slab | 1 : 2.5 : 3.5 | 3000 |
🪚 plywood & osb typical thickness
| nominal (in) | actual (in) | mm (approx) |
|---|---|---|
| ¼″ | ¼″ (0.25) | 6.35 |
| ½″ | 15/32″ | 11.9 |
| ¾″ | 23/32″ | 18.3 |
⛓️ rebar sizes – US # / metric
| US bar # | diameter (in) | metric (mm) |
|---|---|---|
| #3 | 0.375″ | 9.5 |
| #4 | 0.500″ | 12.7 |
| #5 | 0.625″ | 15.9 |
| #6 | 0.750″ | 19.1 |
♻️ suggested waste % (by material)
| material | waste % | notes |
|---|---|---|
| lumber (framing) | 8‑12% | cutoffs, defects |
| concrete | 3‑6% | overorder, spill |
| tile / flooring | 10‑15% | cuts, pattern |
✅ why use this construction calculator feet and inches
- real‑world ft/in inputs – no decimal conversion needed
- dual pricing: per sq ft (flooring/plywood) & per cu ft (concrete/gravel)
- waste slider & year‑based multiplier (2024‑2026 inflation sim)
- live bar chart compares area cost vs volume cost
- 5 reference tables: lumber, concrete, plywood, rebar, waste factors
- clean, white background, black text – mobile perfect, WP‑proof
- uses semantic html + FAQ schema for better visibility
frequently asked questions
❓ how do i use the feet and inches fields?
Simply enter the feet in the left box and inches (0‑11.99) in the right. For example 5 feet 9 inches = 5 ft / 9 in. The calculator automatically converts to decimal feet.
❓ what does “model year” change?
It multiplies the final material cost by a trend factor: 2024 = 1.0, 2025 = 1.07, 2026 = 1.15 — useful for rough future budgeting.
❓ are these tables valid outside USA?
Lumber nominal sizes are北美 standard, but metric equivalents are shown. Concrete mix ratios are universal. Waste factors are typical worldwide.
Use the Vinyl Flooring Calculator (Square Feet) to estimate your material needs, or explore the full Feet & Inches Measurement Calculator category for more measurement tools.