---
title: "k6/metrics | Grafana k6 documentation"
description: "k6 Custom Metrics API"
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

# k6/metrics

The [`k6/metrics` module](https://grafana.com/docs/k6/v2.3.x/javascript-api/k6-metrics/) provides functionality to [create custom metrics](https://grafana.com/docs/k6/v2.3.x/using-k6/metrics/create-custom-metrics/) of various types.

Expand table

| Metric type                                                                      | Description                                                                                   |
|----------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------|
| [Counter](https://grafana.com/docs/k6/v2.3.x/javascript-api/k6-metrics/counter/) | A metric that cumulatively sums added values.                                                 |
| [Gauge](https://grafana.com/docs/k6/v2.3.x/javascript-api/k6-metrics/gauge/)     | A metric that stores the min, max and last values added to it.                                |
| [Rate](https://grafana.com/docs/k6/v2.3.x/javascript-api/k6-metrics/rate/)       | A metric that tracks the percentage of added values that are non-zero.                        |
| [Trend](https://grafana.com/docs/k6/v2.3.x/javascript-api/k6-metrics/trend/)     | A metric that calculates statistics on the added values (min, max, average, and percentiles). |