Hardware tool
Stair Rods Calculator
How many stair rods you need, the length to order for your runner width, and the total with brackets included.
Working out rods, brackets and budget
Stair rods are priced per rod, and brackets are often sold separately at two per rod — which is where most budgets get a surprise. Count one rod per step, add landings if you are finishing them, then double that number for brackets before you compare suppliers.
- Budget rods: $18–$30 each in plated steel.
- Mid-range: $30–$60 each in solid brass or brushed nickel.
- Premium and antique: $60–$90+ each, often with decorative finials.
Fit the runner first
Rods go on last, sitting in the crotch where the tread meets the riser. Fitting them before the runner is stretched into place makes it almost impossible to get the tension right.
Choosing rod length, finish and brackets
Three numbers decide a stair rod order: how many rods, how long each one is, and how many brackets come in the box. Length is set by your runner width plus roughly 2in of overhang each side. Brackets are two per rod as standard, and many suppliers price them separately — checking that one line before you order is usually worth more than shopping around on the rods themselves.
| Runner width | Rod length to order | Overhang each side |
|---|---|---|
| 24in / 60cm | 28in / 71cm | 2in / 5cm |
| 27in / 70cm | 31–32in / 80cm | 2–2.5in / 5–6cm |
| 30in / 76cm | 34in / 86cm | 2in / 5cm |
| 32in / 80cm | 36in / 91cm | 2in / 5cm |
Rod finishes and where they suit
- Antique or aged brass — period staircases, warm timber, traditional patterns.
- Polished brass — formal entrance halls where the rods are meant to be seen.
- Brushed nickel or chrome — contemporary interiors and grey or monochrome runners.
- Matt black — modern farmhouse and Victorian revival schemes; hides fingerprints best.
Whatever finish you choose, order every rod at once from a single batch. Metal finishes drift between production runs, and a single replacement rod bought later rarely matches the rest of the flight.
Know your numbers in 30 seconds
Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.
Open the stair runner calculatorWhatever you decide, get the numbers first: the stair runner calculator doubles as a stair runner length calculator, adding nosing wrap, landings, winders, pattern repeat and waste so you order the right length the first time.
Frequently asked questions
How many stair rods do I need?
One rod per step, plus one for each landing you want to finish. A 13-step flight needs 13 rods; add a fourteenth if a landing gets its own.
What length stair rods should I buy?
Buy rods roughly 2in wider than the runner on each side, so a 27in runner takes a 31–32in rod. That lets the finials sit clear of the runner edge.
Do stair rods hold the runner down?
Mostly no. On modern installs the runner is fixed with staples or gripper and the rods are decorative. Only traditional rod-and-clip systems carry any real load.
Do I need an account to use the stair rods calculator?
Yes — the rods calculator is free but sits behind an account so your rod counts, lengths and hardware budget save into your projects and client quotes. The stair runner length calculator on the home page needs no account.
How much do stair rods add to the total cost?
Rods plus brackets typically add $250–$900 to a 13-step flight. Plated steel at the budget end lands near $20 a step all-in; solid brass or antique finishes with decorative finials can pass $90 a step.
Do you need a stair rod on the landing?
Only if the runner continues across the landing and you want the visual line to carry through. A rod at the point where the runner meets the landing tidies the transition, but it is a style choice rather than a fitting requirement.
What size stair rod for a 27in runner?
A 31in or 32in rod. The rule is runner width plus about 2in each side, so the finials sit clear of the runner edge and the brackets land on bare tread rather than on top of the pile.