DF
DECKFOUNDRY
Free deck estimator

Know what the deck needs
before you quote it.

Size the framing. Count the boards. Price the job.

DeckFoundry checks your deck against published IRC tables, builds the material takeoff, and calculates the job from one set of dimensions.

No account needed · Works offline · English and Spanish
26×20 L-shape · 30" off grade
✓ Framing2×12 @ 16" O.C.
✓ Span checkOK
✓ Beam2-ply 2×10, 1 line
✓ Footings6 × 18 in, 3.5 ft deep
Materials only$6,454
Materials only. The cost summary adds labor, overhead and profit.
IRC-based structural checks
English + Español same engine
No account to start
Free to estimate

What it actually does

Enter the deck. DeckFoundry sizes the framing against published code tables, counts every board with cut optimization, and prices the job.

Step 1

Checks the structure

Joist spans, cantilever, beam spans, footing diameter and post height — read from real IRC prescriptive tables, not rules of thumb. Anything outside the tables gets flagged, not guessed.

Step 2

Counts the material

Board-by-board takeoff using actual 5½" face width and 3⁄16" gaps. Compares 12, 16, 20 and 24 ft stock and tells you which to buy — and how to cut it.

Step 3

Prices the job

Builds the cost from the same takeoff: materials, labor by phase, fees, overhead and profit. Contractors on Pro carry the estimate straight into proposals, contracts and job documents.

Not another board calculator

Board calculators count material. DeckFoundry checks the framing too.

A typical deck calculator

  • Board rows and stock lengths
  • Fastener counts
  • You supply the labor cost
  • You supply every price
  • Structural sizing excluded

DeckFoundry

  • Everything on the left
  • Joist, beam, post and footing sizing
  • IRC span validation with pass/fail
  • Labor by phase, overhead and profit
  • Proposal and contractor documents

Estimate in English or Spanish

The Spanish version runs the same calculation engine — same spans, same quantities, same totals. Lumber dimensions and code references stay unchanged, so both versions reference the same materials and standards. Proposals and invoices can be produced in either language, your choice for each document. Contracts and other legal documents stay in English.

English 26×20 L-shape
Joists, full-depth (2×12, 20 ft) 16
Beam boards (2-ply 2×10, 24 ft) 4
Concrete (18in Sonotube) 62 bags
Total materials $6,454
Español Terraza en L 26×20
Viguetas, profundidad total (2×12, 20 ft) 16
Vigas (2 capas 2×10, 24 ft) 4
Concreto (Sonotube 18in) 62 bolsas
Total de materiales $6,454

Materials shown. Labor and markup use the same calculation in both languages. Proposals and invoices can be created in either language; contracts and other legal documents stay in English.

Two ways to use it

Same engine underneath. The difference is how much of the business side you need.

Free

DeckFoundry Lite

$0 · no account
  • Full structural check
  • Material takeoff and shopping list
  • Cut plan and stock-length comparison
  • Cost summary with labor, overhead and profit
  • English & Español
Estimate a deck
For contractors

DeckFoundry Pro

Estimating + job workflow
  • Everything in Lite
  • Change orders, invoices, lien waivers, sub agreements
  • Client proposals and contracts
  • Saved projects, site log, punch list, budget
See Pro

Ready to price your next deck?

Start with the free estimator. No account required, and the structural check is included from the first screen.

Estimate a deck — free See the math