---
type: "gdt-symbol"
name: "Total Runout"
symbol: "⌰"
unicode: "U+2330"
unicode_name: "TOTAL RUNOUT"
category: "runout"
category_name: "Runout controls"
datum_required: "always"
tolerance_zone: "Full indicator movement across the whole surface"
aliases: ["total runout gdt", "runout vs total runout"]
standard: "ASME Y14.5 (cited, not reproduced); ISO 1101"
verified: "August 1, 2026"
url: https://shopmath.org/gdt/total-runout
---

# Total Runout (⌰) — GD&T Symbol, Tolerance Zone and Datum Rules

Same setup as circular runout, but the indicator traverses the full length of the surface while the part rotates and the readings are pooled into one number. That makes total runout a composite control over roundness, straightness, taper, and coaxiality in a single callout.

- **Symbol**: ⌰ (Unicode U+2330)
- **Category**: Runout controls
- **Tolerance zone**: Full indicator movement across the whole surface
- **Datum reference**: always references at least one datum
- **Standard**: ASME Y14.5 (cited, not reproduced); ISO 1101

## Total Runout at a Glance

| Property | Value |
| --- | --- |
| Characteristic | Total Runout |
| Symbol | ⌰ |
| Unicode codepoint | U+2330 |
| Unicode name | TOTAL RUNOUT |
| Category | Runout controls |
| Tolerance zone | Full indicator movement across the whole surface |
| Datum reference | always references at least one datum |
| Standard | ASME Y14.5 (cited, not reproduced); ISO 1101 |

## How Total Runout Behaves

Total Runout belongs to the runout controls group. Control composite error measured while the part rotates about a datum axis.

## Other Runout controls Controls

The controls in the same category — the ones a drawing is choosing between when it specifies total runout.

| Control | Symbol | Tolerance zone or effect | Datum |
| --- | --- | --- | --- |
| [Circular Runout](https://shopmath.org/gdt/circular-runout.md) | ↗ | Full indicator movement in each single cross-section | always references at least one datum |

## Sources and Method for Total Runout

### Total Runout definition

- **Source**: Symbols and codepoints: Unicode Character Database (Unicode License v3). Characteristic list cross-checked against NASA MSFC GD&T Basics (public domain). Descriptions written from scratch; no ASME Y14.5 text reproduced.
- **Method**: compiled
- **Verified against**: Unicode Character Database codepoint check; 98/98 structural checks passed

### Assumptions

- Descriptions are original prose. No ASME Y14.5 definitional text, worked example or figure is reproduced — the standard is cited, not copied.
- Symbol glyphs and codepoints are from the Unicode Character Database; a drawing may render the same characteristic with a different font.
- Dataset scope: EXCLUDED: all ASME Y14.5 definitional text, worked examples and figures. Every description on this site is original prose.

**Data last verified**: August 1, 2026

## Common Questions About Total Runout in GD&T

### What does Total Runout mean in GD&T?

Same setup as circular runout, but the indicator traverses the full length of the surface while the part rotates and the readings are pooled into one number. That makes total runout a composite control over roundness, straightness, taper, and coaxiality in a single callout.

### What is the GD&T symbol for total runout?

Total Runout uses the ⌰ symbol — Unicode U+2330 (TOTAL RUNOUT). It sits in the first compartment of the feature control frame.

### Does Total Runout need a datum?

Total Runout always references at least one datum. Without a datum reference frame the control has no origin to measure from.

### What is the tolerance zone for Total Runout in GD&T?

The total runout tolerance zone is: Full indicator movement across the whole surface.

## Related pages

- Previous control: [Circular Runout](https://shopmath.org/gdt/circular-runout.md) (↗)
- Next control: [Maximum Material Condition (MMC)](https://shopmath.org/gdt/maximum-material-condition.md) (Ⓜ)
- All symbols: [GD&T symbol reference](https://shopmath.org/gdt.md)
- Tolerances: [ISO 286 fit reference](https://shopmath.org/fits.md)

---

*Source: [ShopMath](https://shopmath.org/gdt/total-runout) — data verified August 1, 2026. Reference data; verify against the governing standard before manufacture.*