Unit Conversions for NZ building work.
Metric-first helpers for framing, drainage, sheet coverage, drawing scale and material take-offs, laid out like the reference but adapted to the Roots & Echo site language.
Length
NZ building work stays metric-first, but this card helps convert to and from imperial site notes.
Area
Useful for floor areas, roof areas and quick material take-offs.
Volume & Premix Bags
For small concrete pads, piles and footings. Set the bag yield to match the product on site.
Bags needed: 0
Drawing Scale
Quickly convert plan lengths to real-world lengths for 1:X drawing scales.
Tip: combine this with the Length card when a plan note switches between mm and imperial site dimensions.
Diameter (Screws / Bolts)
Small helper for swapping between metric hardware dimensions and approximate imperial fractions.
0"
Drainage Fall
NZBC G13/AS2 is slope-sensitive, so this card converts common fall expressions used on plans and site notes.
NZ Framing Timber Sizes
Metric framing sizes aligned to common NZS 3604 residential framing practice and current CodeMark-listed LVL sections.
Actual section: 70 x 45 mm
Approx imperial: 2.76 x 1.77 in
Common dressed batten-size member used in NZ residential work.
Sheet Effective Cover
Use this for roofing or wall sheets where side lap changes the working cover. Manufacturer minimum pitch and overlap rules still govern.
Effective cover: 0 mm
Sheets needed: 0
NZ-first reference note: drainage conversions are intended to support NZBC G13 drainage workflows, timber sizes are aligned to common NZS 3604 framing practice and current CodeMark-listed LVL sections, and roof sheet cover still needs to be checked against the specific cladding manufacturer and current E2/AS1 requirements for pitch and overlap.