DMX Address Calculator

Convert between absolute and universe-relative DMX addresses, plan fixture layouts, and check channel ranges.

Absolute ↔ Universe Address

DMX universes hold 512 channels each. An absolute address maps to a universe number and a channel within that universe.

Absolute Address

Universe

Channel (1–512)

Universe numbering starts at (some systems start at 0)

0 1

Enter a start address and how many channels the fixture uses to see its full occupied range.

Start Address

Channel Count

Quantity

See how many fixtures of a given channel width fit in a 512-channel universe and what capacity is used.

Channels per Fixture

First Address

Visual representation of channel usage based on the fixture range above.

Used Free Overflow