Conduit fill calculator

Add every wire going in the pipe, grounds included. It tells you if they fit and the smallest pipe that works.

How this is calculated

Conductor areas come from Chapter 9, Table 5. Raceway areas come from Chapter 9, Table 4.
Allowed fill per Chapter 9, Table 1: 53% for one conductor, 31% for two, 40% for three or more. Nipples 24 in. or shorter may be filled to 60% (Note 4).
Count equipment grounding and bonding conductors (Note 3). Bare conductors use Table 8 areas, which aren't included yet.
More than three current-carrying conductors in one raceway means derating. The wire size calculator handles that.