---
title: "Decibels to A-weighted decibels — dB to dB(A) converter"
description: "1 decibel = 1 A-weighted decibels. Convert decibels to A-weighted decibels with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/db-to-dba/
site: "At One Place"
---

# Decibels to A-weighted decibels

**1 decibel in A-weighted decibels: 1 dB = 1 dB(A)**

dB(A) = dB × 1

To convert decibels to A-weighted decibels, multiply by 1. The table below gives the values people look up most often, and the converter works for any number.

## Decibels to A-weighted decibels table

*Common decibel values converted to A-weighted decibels.*

| Decibels | A-weighted decibels |
| --- | --- |
| 1 dB | 1 |
| 2 dB | 2 |
| 3 dB | 3 |
| 4 dB | 4 |
| 5 dB | 5 |
| 10 dB | 10 |
| 15 dB | 15 |
| 20 dB | 20 |
| 25 dB | 25 |
| 30 dB | 30 |
| 40 dB | 40 |
| 50 dB | 50 |
| 75 dB | 75 |
| 100 dB | 100 |
| 250 dB | 250 |
| 500 dB | 500 |
| 1,000 dB | 1,000 |

## How the conversion works

The relationship is dB(A) = dB × 1. Both units measure sound, so the conversion is a fixed factor that never changes.

> A-weighted decibel: Weighted to match human hearing sensitivity; the standard measure for noise exposure.

## Common questions

### How many A-weighted decibels are in one decibel?

One decibel equals 1 A-weighted decibels. dB(A) = dB × 1.

### How do you convert decibels to A-weighted decibels?

Use dB(A) = dB × 1. So 10 dB is 10 dB(A).

### How many decibels are in one A-weighted decibel?

One A-weighted decibel equals 1 decibels, which is the reverse of the conversion above.

### Is there more than one kind of A-weighted decibel?

Weighted to match human hearing sensitivity; the standard measure for noise exposure.

## Related pages

- [A-weighted decibels to Decibels](https://atoneplace.net/convert/dba-to-db/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)