How to measure the space between spindles for stairs and landings

STAIRS

going of flight (mm)

LANDING

going of landing (mm)
 
Use the below calculations for both stairs and landing.

For 32mm SPINDLES

 

x ÷ 112 for a turned spindle

 

x ÷ 125 for a plain spindle

 

For 41mm SPINDLES

 

x ÷ 121 for a turned spindle

 

x ÷ 135 for a plain spindle

 

 

(i.e. for a 41mm turned stair spindle: 2500mm ÷ 121mm = 20.66 = 20 spindles)