Setout
A construction calculator that works in feet, inches and sixteenths — and in metres and millimetres.
One payment. No subscription, nothing to renew, and no ads.
It works with no signal. Nothing in the app touches the internet.
Where the numbers come from
Stair and railing limits are checked word for word against the official text of the
2024 International Residential Code, the UK Approved Document K and the Australian
NCC 2025. Every screen names the section it used and the date it was verified.
Local codes can be stricter. Check with your inspector.