---
tag: m0092
title: Set Axis Steps-per-unit
brief: Set the number of steps-per-mm, per-inch, or per-degree
author: thinkyhead

group: motion

codes: [ M92 ]

notes: |
  -  Get the current steps-per-unit settings using `M92` with no parameters or [`M503`](/docs/gcode/M503.html) on older versions of Marlin.

  With `EEPROM_SETTINGS` enabled:
  - This setting for all axes is saved with [`M500`](/docs/gcode/M500.html) and loaded with [`M501`](/docs/gcode/M501.html).
  - [`M502`](/docs/gcode/M502.html) resets steps-per-unit for all axes to the values from `DEFAULT_AXIS_STEPS_PER_UNIT`.

parameters:
  -
    tag: X
    optional: true
    description: X steps per unit
    values:
      -
        tag: steps
        type: float
  -
    tag: Y
    optional: true
    description: Y steps per unit
    values:
      -
        tag: steps
        type: float
  -
    tag: Z
    optional: true
    description: Z steps per unit
    values:
      -
        tag: steps
        type: float
  -
    tag: E
    optional: true
    description: E steps per unit
    values:
      -
        tag: steps
        type: float
  -
    tag: T
    optional: true
    description: Target extruder (Requires `DISTINCT_E_FACTORS`)
    values:
      -
        tag: index
        type: int

example:
  -
    pre: Set E steps for a new extruder
    code: M92 E688.4

---

Use [`M92`](/docs/gcode/M092.html) to set the steps-per-unit for one or more axes. This setting affects how many steps will be done for each unit of movement.

Units will usually be set in steps-per-millimeter unless:
- The firmware has `INCH_MODE_SUPPORT` enabled and has been set to *Inches Mode* by [`G20`](/docs/gcode/G020.html) or by having inches as the default unit.
- The machine is a `SCARA` in which case the A and B axes are configured in ***steps-per-degree***, not steps-per-distance.