Measuring correctly is the most important step before ordering stair components. Get the numbers right and everything else becomes much easier.
### What You Need to Measure
1. **Total Rise**
This is the vertical height from the finished lower floor level to the finished upper floor level. Measure in millimetres.
2. **Total Run (or Going)**
This is the total horizontal distance the staircase will cover.
3. **Available Width**
The clear width between walls or the space you have for the staircase.
4. **Headroom**
Check there is enough clearance under any upper floor structure.
### Basic Calculations
**Number of Risers**
Divide the Total Rise by your preferred riser height (usually between 150–190 mm for residential stairs in Australia). Round to the nearest whole number.
**Individual Riser Height**
Total Rise ÷ Number of Risers.
**Number of Treads (Goings)**
Usually one less than the number of risers for a straight flight.
**Individual Going**
Total Run ÷ Number of Treads.
Always double-check that your riser and going combination feels comfortable and meets the National Construction Code (NCC) requirements for your situation.
### Tips for Ordering Components
- Decide whether you want closed house or open cut stringers first — this affects how the treads and risers are fitted.
- Choose your tread thickness (30 mm or 40 mm) early.
- Order matching risers and nosings in the same timber species for a consistent look.
- If you’re unsure, use our Stair Configurator or send us your measurements — we’re happy to help.
Accurate measuring saves time, money and frustration. Once you have your rise, run and preferred style, you can confidently choose the right timber stair treads, risers and stringers from our range.