Length of staircase for 8, 9, 10, 11 & 12 foot ceiling depends on several factors like, tread length, riser height, local building code, construction requirements and where you live.

Staircase is most important part of building such as residential, commercial, factories, public, hospital and etc. It helps people to comfortably access different floor of a building. When you are thinking about your new task designing and construction of staircase, length of staircase, total run, ceiling height, size of rise & run or tread is important factors that ensure good design and it make comfortable flight between one floor to another.

Staircase may be straight, L shaped, U shaped, spirally curved cantilever split and winder shape. Stair may be in a straight run leading from one floor to another without turn or change in direction, it may change direction to flight connected at 90-degree angle landing and in a multistorey or high rise building its turn 180-degree angle.

Staircase have many component like riser, tread, flight, landing, slop etc. Tread is horizontal part of staircase on which we first apply foot on this for moving from ground floor to upper floor. The tread depth is measured from the back of one tread the back of next and their width is measured from one side to other. Riser is the vertical portion between each tread on the stair, it may be missing in open stair, riser height measured from bottom of each tread to next upper tread, or riser height may also called vertical distance between two tread.

Length of staircase or length of a flight of stairs is equal to sum of all tread length or total run in one flight and landing width. Generally length of staircase depending on height of ceiling, riser height & tread width.

**How long is a flight of stairs**? For most homes, generally the length of a flight of stairs is between **9 to 12 feet** long. The total length of a flight of stairs for an 8-foot ceiling is approximately 9-feet long. Staircase consist of two flight and one landing. Many code suggest that riser height is about 6″ high, tread width is about 10″ and landing width is about 42″ or 3.5 feet.

**How to calculate staircase length**

To figure out staircase length, first divide the ceiling height by riser height, resulting give us number of riser, divide the no. of riser by 2 to get number of riser in a flight, no. of riser _ 1 give us number of tread or going in a flight, multiplication of number of tread and tread width give us total run and add the total run with landing width that result length of staircase or length of a flight of stairs.

**For example:- length of staircase for a 10 foot ceiling**

1) no. of riser = 10×12″÷6″ = 20

2) no. of riser in a flight = 20÷2=10

3) no of tread = 10_1 = 9

4) total run = 9×10″ = 90″

5) staircase length = 90″ + 42″ = 132″ or 11′

In general, with minimum tread length of 10″, the length of staircase for an 8-foot ceiling need to be 9 feet long, while the length of staircase for a 9-foot ceiling need to be 10 feet long. Moreover, the length of staircase for a 10-foot ceiling need to be 11 feet long, while the length of staircase for a 11-foot ceiling need to be 12 feet long. In addition, the length of staircase for a 7-foot ceiling need to be 8 feet long.

**Length of staircase for an 8 foot ceiling**

Typically, for an 8 foot ceiling, stairs need to be 9 feet long. The total length of a flight of stairs (length of staircase) for an 8-foot ceiling used for residential home is approximately **9 feet** long. Mathematics calculation such as :- 1) no. of riser = 8 × 12″÷ 6″ = 16, 2) no. of riser in a flight = 16÷ 2 = 8, 3) no of tread = 8_1 = 7, 4) total run = 7×10″ = 70″ & 5) staircase length = 70″ + 42″ = 112″ or 9.33′.

**How long is a staircase for 8′ ceiling**

The length of a staircase for an 8-foot ceiling ought to be 9 feet long and require about 10 to 12 feet of horizontal space. This is standard length of staircase to goes up an 8 foot ceiling

**Length of staircase for a 9 foot ceiling**

Typically for a 9 foot ceiling, stairs need to be 10 feet long. The total length of a flight of stairs (length of staircase) for a 9-foot ceiling used for residential home is approximately 10** feet** long. Mathematics calculation such as :- 1) no. of riser = 9 × 12″÷ 6″ = 18, 2) no. of riser in a flight = 18÷ 2 = 9, 3) no of tread = 9_1 = 8, 4) total run = 8×10″ = 80″ & 5) staircase length = 80″ + 42″ = 122″ or 10.16′.

**How long is a staircase for 9′ ceiling**

The length of a staircase for a 9-foot ceiling ought to be 10 feet long and require about 11 to 13 feet of horizontal space. This is standard length of staircase to goes up a 9 foot ceiling.

**Length of staircase for a 10 foot ceiling**

Typically for a 10 foot ceiling, stairs need to be 11 feet long. The total length of a flight of stairs (length of staircase) for a 10-foot ceiling used for residential home is approximately 11** feet** long. Mathematics calculation such as :- 1) no. of riser = 10 × 12″÷ 6″ = 20, 2) no. of riser in a flight = 20÷ 2 = 10, 3) no of tread = 10_1 = 9, 4) total run = 9×10″ = 90″ & 5) staircase length = 90″ + 42″ = 132″ or 11′.

**How long is a staircase for 10′ ceiling**

For a 10 foot ceiling, stairs need to be 11 feet long. The total length of a flight of stairs (length of staircase) for a 10-foot ceiling used for residential home is approximately 11** feet** long. This is standard length of staircase to goes up a 10 foot ceiling

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**Length of staircase for a 11 foot ceiling**

For a 11 foot ceiling, stairs need to be 12 feet long. The total length of a flight of stairs (length of staircase) for a 11-foot ceiling used for residential home is approximately 12** feet** long. Mathematics calculation such as :- 1) no. of riser = 11 × 12″÷ 6″ = 22, 2) no. of riser in a flight = 22÷ 2 = 11, 3) no of tread = 11_1 = 10, 4) total run = 10×10″ = 100″ & 5) staircase length = 100″ + 42″ = 142″ or 11.83′.

**How long is a staircase for 11′ ceiling**

For a 11 foot ceiling, stairs need to be 12 feet long. The total length of a flight of stairs (length of staircase) for a 11-foot ceiling used for residential home is approximately 12** feet** long. This is standard length of staircase to goes up a 11 foot ceiling

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**Length of staircase for a 12 foot ceiling**

For a 12 foot ceiling, stairs need to be 13 feet long. The total length of a flight of stairs (length of staircase) for a 12-foot ceiling used for residential home is approximately 13** feet** long. Mathematics calculation such as :- 1) no. of riser = 12 × 12″÷ 6″ = 24, 2) no. of riser in a flight = 24÷ 2 = 12, 3) no of tread = 12_1 = 11, 4) total run = 11×10″ = 110″ & 5) staircase length = 110″ + 42″ = 152″ or 13′.

**How long is a staircase for 12′ ceiling**

The length of a staircase for a 12-foot ceiling ought to be 13 feet long and require about 13 to 15 feet of horizontal space. This is standard length of staircase to goes up a 12 foot ceiling.

**Length of staircase for a 2.1m ceiling**

For a 2.1m ceiling, stairs need to be 2.4 meters long. The total length of a flight of stairs (length of staircase) for a 2.1m ceiling used for residential home is approximately 2.4 meters long.

**Length of staircase for a 2.4m ceiling**

For a 2.4m ceiling, stairs need to be 2.7 meters long. The total length of a flight of stairs (length of staircase) for a 2.4m ceiling used for residential home is approximately 2.7 meters long.

**Length of staircase for a 2.7m ceiling**

For a 2.7m ceiling, stairs need to be 3 meters long. The total length of a flight of stairs (length of staircase) for a 2.7m ceiling used for residential home is approximately 3 meters long.

**Length of staircase for a 3m ceiling**

For a 3m ceiling, stairs need to be 3.3 meters long. The total length of a flight of stairs (length of staircase) for a 3m ceiling used for residential home is approximately 3.3 meters long.

**Number of steps in staircase by ceiling height**

In general, for a 12-foot ceiling, you would need about 20 to 21 steps, while for a 11-foot ceiling, you would need about 18 to 19 steps. Likewise, for a 10-foot ceiling, you would need about 17 to 18 steps, while for a 9-foot ceiling, you would need about 15 to 16 steps. In addition, for a 8-foot ceiling, you would need about 13 to 14 steps, while for a 7-foot ceiling, you would need about 11 to 12 steps.

**How many steps for a 12-foot ceiling**

To go up 12 feet height of ceiling from floor, you would need approximately 20 to 21 steps. Mathematical calculation: 1) No. of steps to go up 12 feet height of staircase or ceiling = (12 ×12)÷ 7 = 20.57, round it near to 21.

**How many steps for a 11-foot ceiling**

To go up 11 feet height of ceiling from floor, you would need approximately 18 to 19 steps. Mathematical calculation: 1) No. of steps to go up 11 feet height of staircase or ceiling = (11 ×11)÷ 7 = approx. 19 steps.

**How many steps for a 10-foot ceiling**

To go up 10 feet height of ceiling from floor, you would need approximately 17 to 18 steps. Mathematical calculation: 1) No. of steps to go up 10 feet height of staircase or ceiling = (10 ×10)÷ 7 = approx. 18 steps.

**How many steps for a 9-foot ceiling**

To go up 9 feet height of ceiling from floor, you would need approximately 15 to 16 steps. Mathematical calculation: 1) No. of steps to go up 9 feet height of staircase or ceiling = (9 ×9)÷ 7 = approx. 16 steps.

**How many steps for a 8-foot ceiling**

To go up 8 feet height of ceiling from floor, you would need approximately 13 to 14 steps. Mathematical calculation: 1) No. of steps to go up 8 feet height of staircase or ceiling = (8 ×8)÷ 7 = approx. 14 steps.

**How many steps for a 7-foot ceiling**

To go up 7 feet height of ceiling from floor, you would need approximately 11 to 12 steps. Mathematical calculation: 1) No. of steps to go up 7 feet height of staircase or ceiling = (7 ×7)÷ 7 = approx. 12 steps.

**Conclusions**:-

In general, for an 8-foot ceiling, the length of stair ought to be 9 feet long, while for a 9-foot ceiling, the length of stair ought to be 10 feet long. Moreover, for a 10-foot ceiling, the length of stair ought to be 11 feet long, while for a 11-foot ceiling, the length of stair ought to be 12 feet long. In addition, for a 12-foot ceiling, the length of stair ought to be 13 feet long