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---
stage: Monitor
group: APM
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
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# Unit formats reference
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> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/201999) in GitLab 12.9.
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You can select units to format your charts by adding `format` to your
[axis configuration ](prometheus.md#dashboard-yaml-properties ).
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## Internationalization and localization
Currently, your [internationalization and localization options ](https://en.wikipedia.org/wiki/Internationalization_and_localization ) for number formatting are dependent on the system you are using i.e. your OS or browser.
## Engineering Notation
For generic or default data, numbers are formatted according to the current locale in [engineering notation ](https://en.wikipedia.org/wiki/Engineering_notation ).
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While an [engineering notation exists for the web ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/NumberFormat ), GitLab uses a version based off the [scientific notation ](https://en.wikipedia.org/wiki/Scientific_notation ). GitLab formatting acts in accordance with SI prefixes. For example, using GitLab notation, `1500.00` becomes `1.5k` instead of `1.5E3` . Keep this distinction in mind when using the engineering notation for your metrics.
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Formats: `engineering`
SI prefixes:
| Name | Symbol | Value |
| ---------- | ------- | -------------------------- |
| `yotta` | Y | 1000000000000000000000000 |
| `zetta` | Z | 1000000000000000000000 |
| `exa` | E | 1000000000000000000 |
| `peta` | P | 1000000000000000 |
| `tera` | T | 1000000000000 |
| `giga` | G | 1000000000 |
| `mega` | M | 1000000 |
| `kilo` | k | 1000 |
| `milli` | m | 0.001 |
| `micro` | μ | 0.000001 |
| `nano` | n | 0.000000001 |
| `pico` | p | 0.000000000001 |
| `femto` | f | 0.000000000000001 |
| `atto` | a | 0.000000000000000001 |
| `zepto` | z | 0.000000000000000000001 |
| `yocto` | y | 0.000000000000000000000001 |
**Examples:**
| Data | Displayed |
| --------------------------------- | --------- |
| `0.000000000000000000000008` | 8y |
| `0.000000000000000000008` | 8z |
| `0.000000000000000008` | 8a |
| `0.000000000000008` | 8f |
| `0.000000000008` | 8p |
| `0.000000008` | 8n |
| `0.000008` | 8μ |
| `0.008` | 8m |
| `10` | 10 |
| `1080` | 1.08k |
| `18000` | 18k |
| `18888` | 18.9k |
| `188888` | 189k |
| `18888888` | 18.9M |
| `1888888888` | 1.89G |
| `1888888888888` | 1.89T |
| `1888888888888888` | 1.89P |
| `1888888888888888888` | 1.89E |
| `1888888888888888888888` | 1.89Z |
| `1888888888888888888888888` | 1.89Y |
| `1888888888888888888888888888` | 1.89e+27 |
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## Numbers
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For number data, numbers are formatted according to the current locale.
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Formats: `number`
**Examples:**
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| Data | Displayed |
| ---------- | --------- |
| `10` | 1 |
| `1000` | 1,000 |
| `1000000` | 1,000,000 |
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## Percentage
For percentage data, format numbers in the chart with a `%` symbol.
Formats supported: `percent` , `percentHundred`
**Examples:**
| Format | Data | Displayed |
| ---------------- | ----- | --------- |
| `percent` | `0.5` | 50% |
| `percent` | `1` | 100% |
| `percent` | `2` | 200% |
| `percentHundred` | `50` | 50% |
| `percentHundred` | `100` | 100% |
| `percentHundred` | `200` | 200% |
## Duration
For time durations, format numbers in the chart with a time unit symbol.
Formats supported: `milliseconds` , `seconds`
**Examples:**
| Format | Data | Displayed |
| -------------- | ------ | --------- |
| `milliseconds` | `10` | 10ms |
| `milliseconds` | `500` | 100ms |
| `milliseconds` | `1000` | 1000ms |
| `seconds` | `10` | 10s |
| `seconds` | `500` | 500s |
| `seconds` | `1000` | 1000s |
## Digital (Metric)
Converts a number of bytes using metric prefixes. It scales to
use the unit that's the best fit.
Formats supported:
- `decimalBytes`
- `kilobytes`
- `megabytes`
- `gigabytes`
- `terabytes`
- `petabytes`
**Examples:**
| Format | Data | Displayed |
| -------------- | --------- | --------- |
| `decimalBytes` | `1` | 1B |
| `decimalBytes` | `1000` | 1kB |
| `decimalBytes` | `1000000` | 1MB |
| `kilobytes` | `1` | 1kB |
| `kilobytes` | `1000` | 1MB |
| `kilobytes` | `1000000` | 1GB |
| `megabytes` | `1` | 1MB |
| `megabytes` | `1000` | 1GB |
| `megabytes` | `1000000` | 1TB |
## Digital (IEC)
Converts a number of bytes using binary prefixes. It scales to
use the unit that's the best fit.
Formats supported:
- `bytes`
- `kibibytes`
- `mebibytes`
- `gibibytes`
- `tebibytes`
- `pebibytes`
**Examples:**
| Format | Data | Displayed |
| ----------- | ------------- | --------- |
| `bytes` | `1` | 1B |
| `bytes` | `1024` | 1KiB |
| `bytes` | `1024 * 1024` | 1MiB |
| `kibibytes` | `1` | 1KiB |
| `kibibytes` | `1024` | 1MiB |
| `kibibytes` | `1024 * 1024` | 1GiB |
| `mebibytes` | `1` | 1MiB |
| `mebibytes` | `1024` | 1GiB |
| `mebibytes` | `1024 * 1024` | 1TiB |
