A framing takeoff turns a floor plan into a lumber list. The quick rule, "one stud per foot of wall", gets you roughly there on simple jobs. But on anything with openings, corners and changes of wall height, a proper takeoff that counts each part is faster to order from, cheaper, and far less likely to leave you short on day two.
Start with a wall schedule
Before counting anything, list every wall: its length, height, stud size and spacing, and how many openings, corners and junctions it has. Number the walls on the plan so you can check the list against the drawing. Do the same for floors (joist span, size, spacing, area) and roofs (span, pitch, length, overhang). The schedule is the backbone of the takeoff and makes it easy to price changes later.
Walls
- Layout studs: wall length ÷ spacing, plus one. At 16" on centre, that's 3 studs per 4 ft.
- Corners and junctions: about two extra studs each. Corners need a stud for the board on the inside face; T-junctions need backing where the wall joins.
- Openings: king and jack studs on each side, plus cripples above and below. Allow about three extra studs per opening; cripples often come from offcuts.
- Plates: one bottom plate and a double top plate, so three times the wall length.
- Headers or lintels over each opening, sized for the span and load.
- Blocking or fire blocking at mid-height and wherever fixtures, cabinets, handrails and board edges need support.
On 8 ft walls with a double top plate, precut 92⅝" studs give a finished height of 97⅛", which suits 8 ft drywall plus the ceiling board.
Floors
Joists = floor length ÷ spacing + 1. Then add:
- Rim or header joists around the edge
- Doubled joists under parallel partitions and around stair and chimney openings
- Trimmers and headers for openings
- Blocking or strutting at mid-span (often required on longer spans)
- Hangers at every joist end that sits against a beam or ledger
- Subfloor sheets at floor area plus about 10%, with adhesive and screws
Joist size and span always come from the span tables in your local code, never from the calculator.
Roofs
Rafters come from the span and pitch: rafter length = run ÷ cos(pitch), plus the overhang. Count them for both slopes, then add:
- The ridge board or beam
- Collar ties or rafter ties
- Hip, valley and jack rafters on hipped and cut-up roofs
- Fascia and sub-fascia, plus lookouts for gable overhangs
- Bracing, straps and connectors specified by the design
If the roof uses engineered trusses, the takeoff is mostly the truss order itself plus bracing, connectors and gable framing. The truss supplier does the design.
Choose stock lengths wisely
Buying the right lengths saves more money than any discount. A 13 ft joist run cut from 14 ft stock wastes little. Cut from 16 ft stock, it wastes a lot. Plates are best bought in the longest lengths you can handle, so there are fewer joins. The framing calculators pick the shortest stock that covers each run.
Hardware and sheathing
Don't forget nails or screws, hangers, ties and straps, and sheathing, house wrap and tape. These lines often add up to 15–25% of the framing budget, and they're the ones most often left off a rushed quote.
Waste
Add about 10% to studs and plates, and more for complex walls, lots of openings or short wall runs. Joists and rafters cut to length waste less, but allow a few spares for crowned, split or twisted pieces.
A worked example
A 24 ft exterior wall, 8 ft tall, 2×4 at 16" OC, two corners and one window: 19 layout studs + 4 for corners + 3 for the opening = 26, plus 10% = 29 studs. Plates: 3 × 24 ft = 72 ft, so four 20 ft lengths. Plus a header for the window and seven sheets of OSB if it's sheathed.
The wall framing, floor joist and rafter calculators produce these counts for each part of the frame. Add each one to the same job and the quote builds itself.
Common mistakes
- Forgetting the extra studs at corners, junctions and openings
- Counting plates once instead of three times the wall length
- Missing blocking for kitchens, bathrooms and handrails
- Leaving off hardware and fasteners
- Pricing stock lengths that don't suit the runs
Common questions
How many studs per foot of wall?
At 16" OC, plan on about one stud per linear foot of wall once corners and openings are counted.
How many plates does a wall need?
Three runs on most walls: one bottom plate and a double top plate. Take the wall length, multiply by three, and convert to stock lengths, staggering the top-plate joints by at least 24".
What do corners and openings add?
Each corner adds two or three studs, depending on whether you build a three-stud corner or a two-stud corner with drywall clips. Each opening adds a king stud and a jack stud on each side, a header, a sill for windows, and cripples above and below. Count them from the plan, not from a per-foot rule.
How much waste should I allow for framing?
About 10% for typical walls, and more for complex layouts with lots of openings, angles or short runs. The waste factors guide has a full table by trade.
This guide is general information for estimating. It is not engineering, legal or tax advice. Check local codes and your inspector for your project.