BodyFatRecord: Health Connect body fat data

What Google says BodyFatRecord is

Captures the body fat percentage of a user. Each record represents a person's total body fat as a percentage of their total body mass.

Quoted from Google’s BodyFatRecord Jetpack reference, last updated 2026-06-24, read 2026-10-03.

Class

androidx.health.connect.client.records.BodyFatRecord

Google's category

Body Measurement

Record type

Instantaneous

Unit class

none named in Google's table

Mandatory fields

percentagemetadatatime

Added in (Jetpack)

1.1.0

Permissions

The exact strings Google’s data-types table declares for BodyFatRecord. Google’s page: “Before requesting any permissions, your app must declare them in the manifest.”

<uses-permission android:name="android.permission.health.READ_BODY_FAT" />
<uses-permission android:name="android.permission.health.WRITE_BODY_FAT" />

import androidx.health.connect.client.permission.HealthPermission
import androidx.health.connect.client.records.BodyFatRecord

val permissions = setOf(
    HealthPermission.getReadPermission(BodyFatRecord::class),
    HealthPermission.getWritePermission(BodyFatRecord::class),
)

The 4 fields of BodyFatRecord

Types and descriptions as Google’s reference prints them. The range column quotes Google’s own range annotation or sentence; a dash means Google states none, which is not the same as no validation.

Read BodyFatRecord in Kotlin

The shape of Google’s own read example, with BodyFatRecord and its names filled in. Get the client with HealthConnectClient.getOrCreate(context) after checking getSdkStatus.

import androidx.health.connect.client.HealthConnectClient
import androidx.health.connect.client.records.BodyFatRecord
import androidx.health.connect.client.request.ReadRecordsRequest
import androidx.health.connect.client.time.TimeRangeFilter
import java.time.Instant

suspend fun readBodyFat(
    client: HealthConnectClient,
    startTime: Instant,
    endTime: Instant,
): List<BodyFatRecord> {
    val response = client.readRecords(
        ReadRecordsRequest(
            BodyFatRecord::class,
            timeRangeFilter = TimeRangeFilter.between(startTime, endTime),
        )
    )
    // One page of up to pageSize records (default 1000); follow
    // response.pageToken for the rest.
    return response.records
}

Setting up the client, the permission flow and Play Console declaration: integrating Health Connect step by step.

HealthKit counterpart

The metric on other platforms

This guide lists BodyFatRecord beside the types on the other platforms this site covers whose own descriptions name the same metric, each quoted, with how each one is read.

• Body Composition API: Weight, Body Fat, and Lean Mass Data

Questions

What permission does BodyFatRecord need?

Google's Health Connect data-types table (read 2026-10-03) declares android.permission.health.READ_BODY_FAT for reading BodyFatRecord and android.permission.health.WRITE_BODY_FAT for writing it, and says apps must declare permissions in the manifest before requesting them.

Can you aggregate BodyFatRecord with AggregateRequest?

Not directly. As read on 2026-10-03, Google's Jetpack reference defines no AggregateMetric constants on BodyFatRecord, so there is no metric to put in an AggregateRequest. Read the records with readRecords and a ReadRecordsRequest, and compute any summary yourself.

What values does BodyFatRecord.percentage accept?

Google's reference types percentage as Percentage. Its description reads: "Percentage. Required field. Valid range: 0-100."

Is BodyFatRecord an interval, instantaneous or series record?

Google's data-types table lists BodyFatRecord as Instantaneous, and defines that column as indicating "whether the data is recorded at an instant in time or over an interval". Its mandatory fields are percentage, metadata and time.