The number of steps in a flight of stairs can vary depending on the design, building code, vertical height of ceiling and construction of the staircase. Typically, a standard flight of stairs contains about 13 to 15 steps. Therefore, if we assume an average of 14 steps per flight, 100 steps would roughly be equivalent to around 7 flights of stairs (100 steps / 14 steps per flight ≈ 7.14 flights).

To calculate the number of flight in 100 steps, you need to divide 100 steps by 14 steps per flight, such as total number of flights per 100 steps = total steps/14, so 100/14 = 7.14 flights (or rounded to 7 flights).

A typical stairway consists of riser, run, landing and flight. Riser refers to the vertical part of a step or stair. It’s the height between one step and the next. The average riser height should be 7 to 7-1/2 inches, maximum is about 7-3/4 inches, minimum is about 4 inches, but however, many homeowners kept it about 7 inches.

Run is the horizontal part of a step or stair. It’s the depth or length of the stair tread, the part you step on. The average run length should be 10 inches without nosing and 11 inches with nosing.

Stairs typically consist of a series of steps that allow people to ascend or descend between different levels in a building or structure. Each step consists of a horizontal tread and a vertical riser. The incline length of one step is about 13 inches if riser height is 7 inches and tread length is 10 inches.

The number of steps on a staircase depends on the ceiling height. A typical 8-foot ceiling has 13 to 15 steps, a 9-foot ceiling has 15 to 17 steps, and a 10-foot ceiling has 17 to 19 steps.

The average vertical height of ceiling depends on ceiling height plus thickness of ceiling drywall, the depth of the upstair floor joists and thickness of flooring materials. The average vertical height of a flight of stairs ranges from 8 1/2 to 11 feet.

If you have a ceiling height of 8 feet, you can assume the total vertical height is 9 feet. If you have a 10-foot ceiling, you can expect the total vertical height to be about 11 feet.

In the United states, in a home with standard 8 feet ceiling there are typically 13 to 15 steps (or on average 14 steps) in one flight of stairs in a residential home. if we assume an average of 14 steps per flight, so 100 steps would roughly be equivalent to around 7 flights of stairs (100 steps / 14 steps per flight ≈ 7.14 flights).

**Here’s are general guidelines for how many flight of stairs in different amount of steps:**

- 100 steps would roughly be equivalent to around 7 flights of stairs (100 steps / 14 steps per flight ≈ 7.14 flights).
- 150 steps would roughly be equivalent to around 11 flights of stairs (150 steps / 14 steps per flight ≈ 10.71 flights).
- 180 steps would roughly be equivalent to around 13 flights of stairs (180 steps / 14 steps per flight ≈ 12.86 flights).
- 200 steps would roughly be equivalent to around 14 flights of stairs (200 steps / 14 steps per flight ≈ 14.3 flights).
- 300 steps would roughly be equivalent to around 21 flights of stairs (300 steps / 14 steps per flight ≈ 21.4 flights).
- 500 steps would roughly be equivalent to around 36 flights of stairs (500 steps / 14 steps per flight ≈ 35.71 flights).
- 1,000 steps would roughly be equivalent to around 72 flights of stairs (1000 steps / 14 steps per flight ≈ 71.4 flights).
- 2,000 steps would roughly be equivalent to around 143 flights of stairs (2000 steps / 14 steps per flight ≈ 142.8 flights).
- 10,000 steps would roughly be equivalent to around 714 flights of stairs (10,000 steps / 14 steps per flight ≈ 714.28 flights).
- 1,200 steps would roughly be equivalent to around 86 flights of stairs (1200 steps / 14 steps per flight ≈ 85.71 flights).
- 120 steps would roughly be equivalent to around 9 flights of stairs (120 steps / 14 steps per flight ≈ 8.57 flights).
- 12,000 steps would roughly be equivalent to around 857 flights of stairs (12000 steps / 14 steps per flight ≈ 857.14 flights).
- 2,500 steps would roughly be equivalent to around 179 flights of stairs (2500 steps / 14 steps per flight ≈ 178.57 flights).
- 2,800 steps would roughly be equivalent to around 200 flights of stairs (2800 steps / 14 steps per flight ≈ 200 flights).
- 350 steps would roughly be equivalent to around 25 flights of stairs (350 steps / 14 steps per flight ≈ 25 flights).
- 400 steps would roughly be equivalent to around 29 flights of stairs (400 steps / 14 steps per flight ≈ 28.57 flights).
- 600 steps would roughly be equivalent to around 43 flights of stairs (600 steps / 14 steps per flight ≈ 42.85 flights).
- 700 steps would roughly be equivalent to around 50 flights of stairs (700 steps / 14 steps per flight ≈ 50 flights).
- 80 steps would roughly be equivalent to around 6 flights of stairs (80 steps / 14 steps per flight ≈ 5.71 flights).
- 800 steps would roughly be equivalent to around 57 flights of stairs (800 steps / 14 steps per flight ≈ 57.14 flights).
- 900 steps would roughly be equivalent to around 64 flights of stairs (900 steps / 14 steps per flight ≈ 64.28 flights).

**Conclusions:**

Generally, there are 14 steps per flight of stairs, so 100 steps would be approximately 64 flights of stairs, 1,000 steps would be 72 flights, 10,000 steps would be 714 flights, and 500 steps would be 36 flights of stairs.