DMX Address & Universe Calculator
Calculate the first and last DMX addresses for a fixture and determine which DMX universe it falls in, given fixture number and channels per fixture.
Results
What is it?
DMX512 is the standard protocol for controlling stage lighting and effects. Each DMX universe contains exactly 512 channels. Fixtures are addressed sequentially � each fixture occupies a block of channels equal to its channel count. When a rig grows beyond 512 channels, a second DMX universe (and a second data line or ArtNet/sACN network) is needed.
How to use
Enter the fixture number you want to address (starting from 1 for the first fixture), the number of DMX channels the fixture uses (check its spec sheet or mode setting), and the starting address for fixture #1. The calculator tells you the exact DMX address to set on the fixture's DIP switches or display.
Example scenario
A lighting rig has 20 moving heads each using 16 channels. Fixture 1 starts at address 1, so its addresses are 1�16. Fixture 12: first address = 1 + (12-1) � 16 = 177, last address = 192. Fixture 17 starts at 257. Fixture 32 would start at 497 � fitting exactly in universe 1 (addresses 1�512).
Pro tip
Always patch fixtures in multiples that divide evenly into 512 channels to avoid universe splits. A fixture straddling two universes (e.g., starting at address 510 with 16 channels) requires special handling in most consoles. Use 16-channel fixtures for maximum 32 fixtures per universe, or 8-channel fixtures for 64 per universe. Label each fixture's DMX address on its hardware during patch for easy troubleshooting.