Smart Build Calculators
Building planners

Garage planner

Sketch layout and preliminary material estimate

Structural solutions require separate verification.

Editable educational example. All dimensions and assumptions can be changed. This is not a ready construction design.

Building
Internal partition
Doors and windows
Opening 1
Garage floor and zones
Wall panels
Floor / deck
Floor panels
Roof panels
Material profiles
posts
beams
rafters
joists
boards
framing
railing
Waste reserve (%)
Fastener assumptions

PRELIMINARY ESTIMATE

v1.0.0 · Geometry checked · Quantity checked · Engineering unverified

GAR-01 sketch layoutExternal 6 × 4 m; Single-car basic garagegarage 21.81 m²Mono-pitch · 25°6.00 × 4.00 m
Reported footprint
24 m²
Usable area
21.81 m²
Roof area
32.274 m²
Roof high point
4.465 m

Material quantities

Required parts are counts; geometric timber quantities are volumes. Stock and reserve are separate pieces. Area and volume rows are alternative views: price only one basis.

PRELIMINARY ESTIMATE

rafters

Geometric consumption
0.41 m3
Required parts
11 $count
Purchased stock
11 piece
Cutting offcuts
0.085 m3
Kerf waste
0 m3
Additional reserve
1 piece
Inspect 11 stock pieces and cutting

framing

Geometric consumption
0.873 m3
Required parts
46 $count
Purchased stock
38 piece
Cutting offcuts
0.267 m3
Kerf waste
0.001 m3
Additional reserve
2 piece
Inspect 38 stock pieces and cutting

wall-cladding-panels

Geometric consumption
64.492 m2
Required parts
36 $count
Purchased stock
36 piece
Cutting offcuts
14.375 m2
Kerf waste
NOT_CALCULATED
Additional reserve
2 piece
Roof / panel layout

5 × 2; Overlap area: 0 m²; Offcuts: 2.009 m²

5 × 2; Overlap area: 0 m²; Offcuts: 2.009 m²

4 × 2; Overlap area: 0 m²; Offcuts: 5.179 m²

4 × 2; Overlap area: 0 m²; Offcuts: 5.179 m²

wall-cladding-panels-volume

Geometric consumption
0.774 m3
Required parts
NOT_CALCULATED
Purchased stock
NOT_CALCULATED
Cutting offcuts
NOT_CALCULATED
Kerf waste
NOT_CALCULATED
Additional reserve
0.039 m3

slab-area

Geometric consumption
24 m2
Required parts
NOT_CALCULATED
Purchased stock
NOT_CALCULATED
Cutting offcuts
NOT_CALCULATED
Kerf waste
NOT_CALCULATED
Additional reserve
1.2 m2

roof-covering

Geometric consumption
32.274 m2
Required parts
21 $count
Purchased stock
21 piece
Cutting offcuts
9.726 m2
Kerf waste
NOT_CALCULATED
Additional reserve
2 piece
Roof / panel layout

7 × 3; Overlap area: 6.51 m²; Offcuts: 9.726 m²

cladding-fasteners

Geometric consumption
684 count
Required parts
684 $count
Purchased stock
684 piece
Cutting offcuts
NOT_CALCULATED
Kerf waste
NOT_CALCULATED
Additional reserve
35 piece

roof-fasteners

Geometric consumption
168 count
Required parts
168 $count
Purchased stock
168 piece
Cutting offcuts
NOT_CALCULATED
Kerf waste
NOT_CALCULATED
Additional reserve
9 piece

Incomplete cost and uncalculated work

No prices entered.

No market prices; costs omit labor, delivery, utilities and unpriced items.

  • Garage door mechanism, header capacity and slab reinforcement
  • Opening framing: NOT_CALCULATED
  • Foundation, footing and anchor engineering
  • Snow, wind, seismic loads and member sizing
  • Connection capacity and fastening design
  • Electrical systems and drainage engineering
  • Labor, delivery, unpriced materials
  • Post/beam/rafter connections and floor-panel fasteners
  • Railing infill, privacy-wall backing and roof longitudinal overhang support
  • Header/jamb redesign at openings; nominal studs are not removed
  • High-wall and roof-end infill framing
  • Geometric cladding/covering stock layout
Template and calculation assumptions
  • Member spacing includes both endpoints. Different profiles use independent stock pools.
  • Openings subtract cladding, not structural members. Header/jamb framing is not designed.
  • Fasteners follow editable per-connection/per-panel assumptions; preliminary quantities only.
  • Roof slope is measured across width; ridge runs along length. Overhang extends projected roof on all sides.
  • Board counts include a full-width final board for trimming. Panel grids do not reuse offcuts between planes.
  • Cladding fasteners use a rectangular fixing grid at the editable stud/fixing spacing in both directions, including endpoints on full wall bounding boxes; openings are not deducted. This is a conservative preliminary assumption, not connection design.
Why other templates were excluded

GAR-03: Partition option conflicts with template.

Compare valid variants (2)

GAR-01

Reported footprint: 24 m²

Usable area: 21.81 m²

Roof area: 32.274 m²

rafters: 0.41 m3; Stock: 11; reserve 1 piece; Offcuts: 0.085

framing: 0.873 m3; Stock: 38; reserve 2 piece; Offcuts: 0.267

wall-cladding-panels: 64.492 m2; Stock: 36; reserve 2 piece; Offcuts: 14.375

wall-cladding-panels-volume: 0.774 m3; Stock: NOT_CALCULATED; reserve 0.039 m3; Offcuts: NOT_CALCULATED

slab-area: 24 m2; Stock: NOT_CALCULATED; reserve 1.2 m2; Offcuts: NOT_CALCULATED

roof-covering: 32.274 m2; Stock: 21; reserve 2 piece; Offcuts: 9.726

cladding-fasteners: 684 count; Stock: 684; reserve 35 piece; Offcuts: NOT_CALCULATED

roof-fasteners: 168 count; Stock: 168; reserve 9 piece; Offcuts: NOT_CALCULATED

Partial cost: Unpriced

GAR-02

Reported footprint: 24 m²

Usable area: 21.81 m²

Roof area: 32.274 m²

rafters: 0.41 m3; Stock: 11; reserve 1 piece; Offcuts: 0.085

framing: 0.69 m3; Stock: 27; reserve 2 piece; Offcuts: 0.12

wall-cladding-panels: 49.57 m2; Stock: 36; reserve 2 piece; Offcuts: 33.028

wall-cladding-panels-volume: 0.595 m3; Stock: NOT_CALCULATED; reserve 0.03 m3; Offcuts: NOT_CALCULATED

slab-area: 24 m2; Stock: NOT_CALCULATED; reserve 1.2 m2; Offcuts: NOT_CALCULATED

roof-covering: 32.274 m2; Stock: 28; reserve 2 piece; Offcuts: 23.726

cladding-fasteners: 532 count; Stock: 532; reserve 27 piece; Offcuts: NOT_CALCULATED

roof-fasteners: 224 count; Stock: 224; reserve 12 piece; Offcuts: NOT_CALCULATED

Partial cost: Unpriced

Example and dimensions

Editable example: 6 × 4 m, walls 2.6 m, 2.8 × 2.2 m opening on the west wall, 0.6 m studs, 25° roof, 0.25 m overhang. Slab volume is shown only after entering thickness.

Required inputs

External dimensions, roof and slope or consistent ridge height, framing profiles and spacing, opening sizes and positions, storage strip or partition, cladding and roof panels, floor or slab, usable and physical sheet dimensions, stock lengths, reserve and user prices.

Formulas and assumptions

Footprint = length × width. Clean zones exclude wall depth and partition thickness. Openings must fit without overlap or partition-junction collision and deduct cladding area. GAR-01 is mono-pitch with one vehicle opening; GAR-02 adds a gable roof and optional storage strip and side openings; GAR-03 divides garage and workshop with a partition. Nominal studs remain across openings. Panels cover full wall bounding rectangles; no opening offcut reuse. Slab volume = footprint × supplied thickness.

Geometric consumption, parts, stock, offcuts, kerf and user reserve are separate. Stock without a layout algorithm is NOT_CALCULATED. Fasteners are preliminary estimates from explicit spacing and connection-count assumptions. Prices come from the user; labor, delivery, utilities and unpriced items are excluded.

Limitations

Preliminary quantities only. No header capacity, garage-door mechanism, slab reinforcement, foundations, drainage or electrical design. No structural, wind, snow, seismic, fire or building-code certification. Vehicle-zone minimums are template constraints.

Related calculators

These links do not select structural solutions. Foundation dimensions require independent specification.