Pressure-treated railing

Baluster Calculator

Use ProWood's baluster calculator to determine quickly how many balusters or spindles you need for your railing.

Balusters are the vertical guards that support the handrail. They must be installed close enough that the space between them is no greater than 4". Most city inspectors carry a 4" ball with them to test the spacing. Installed balusters should withstand 50 lbs. of pressure exerted over a 1-sq. ft. area.

All fields are required

Enter total length of railing (including posts)
ft. in.
Enter total number of posts
Select the size of posts (dimensions listed are actual sizes)
Select a baluster style

Total number of balusters needed