How Many Steps Do I Need? (2026 Guide)
How many steps do I need? Divide total rise (in) by target riser height and round up: an 8 ft rise (96 in) at 7 in risers needs about 14 steps.
Step count = total rise ÷ riser height
The count starts from the total rise — the vertical distance between finished floors — not the horizontal run.
1. Measure the total rise in inches
From the finished floor at the bottom to the finished floor at the top. An 8 ft floor-to-floor height is 8 × 12 = 96 in. Measure in the field after flooring is in place — don't trust the ceiling height alone.
2. Pick a riser height
About 7 in per riser feels best underfoot. Code allows up to 7-3/4 in (7.75 in), and anything under roughly 4 in starts to feel like a ramp — treat 7 in as your planning target.
3. Divide and round up
Total rise ÷ riser target, rounded up to a whole number: 96 ÷ 7 = 13.7, so you need 14 steps. You can't build 13.7 risers, and 13 risers at 7.4 in each would crowd the 7-3/4 in maximum.
4. Re-divide for the exact riser
Split the rise evenly across the steps you chose: 96 ÷ 14 ≈ 6.86 in per riser — a hair under the 7 in target and comfortably legal. Keep every riser within 3/16 in of its neighbors so the flight feels even. The stair tread and riser calculator handles the division for you.
Treads and total run: steps minus one
Every step rises and lands on a tread — except the top one, which lands on the upper floor. The floor acts as the final tread, so a flight of 14 steps carries only 13 treads.
With 10 in treads, the 96 in example needs (14 − 1) × 10 = 130 in ≈ 10.8 ft of horizontal run. Confirm that space exists before you order materials — the stair has to fit between the floors it connects.
Steps for common floor-to-floor rises
Each count below divides the rise by 7 and takes the whole number of steps that keeps risers closest to the 7 in target:
| Total rise | Steps (≈7 in risers) | Exact riser height | Total run at 10 in treads |
|---|---|---|---|
| 96 in (8 ft) | 14 | ≈6.86 in | 130 in ≈ 10.8 ft |
| 105 in (8 ft 9 in) | 15 | 7.00 in | 140 in ≈ 11.7 ft |
| 110 in (9 ft 2 in) | 16 | ≈6.88 in | 150 in = 12.5 ft |
| 120 in (10 ft) | 18 | ≈6.67 in | 170 in ≈ 14.2 ft |
Read across: a 96 in (8 ft) rise takes 14 steps at ≈6.86 in, a 120 in (10 ft) rise 18 steps at ≈6.67 in. The count is always a whole number, so the riser rarely lands exactly on 7 in — what matters is staying under the 7-3/4 in maximum, and every row above does.
Riser tips for a comfortable stair
- Target 7 in — risers at the 7 in mark feel natural underfoot; stay at or under the 7-3/4 in (7.75 in) code maximum and above roughly 4 in.
- Keep risers even — code limits variation between risers in one flight to 3/16 in; a slightly taller first step is where most stumbles happen.
- The top landing isn't a step — the floor the last riser lands on doubles as the final tread, so don't add one to your count.
- Measure the real rise — flooring thickness shifts the numbers; measure bottom floor to top floor on site before you cut stringers or order treads.
Laying out the whole flight? Once the rise and run are set, use them to lay out how many stair stringers you need, and after it's framed, estimate carpet for the stairs — both start from the same step count.
FAQ
How many steps do I need for an 8 ft rise?
About 14. An 8 ft floor-to-floor rise is 96 in, and 96 ÷ 7 ≈ 13.7 — round up to 14 steps, which puts each riser at 96 ÷ 14 ≈ 6.86 in. Remeasure your own rise before cutting stringers.
What riser height should stairs use?
About 7 in is the comfortable target. Residential codes cap risers at 7-3/4 in (7.75 in), and most inspectors expect risers in one flight to match within 3/16 in — build to the same riser on every step.
Why isn't the landing counted as a step?
Because it's floor, not a rise. Each step climbs a riser to a tread, and the top riser lands on the upper floor — that floor surface is the final tread, so a flight has one fewer tread than steps: 14 steps → 13 treads, and total run = (steps − 1) × tread depth.
Need a different size?
Our free calculators give you the exact answer in seconds.