LOG10()

Returns the base-10 logarithm of the specified float expression.

Signature

LOG10 ( float_expression )

Parameters

  • float_expression — Is an expression of type float or of a type that can be implicitly converted to float.

Examples

SELECT POWER (10, LOG10(5));
5
SELECT LOG10(145.175642);
2.1618937552594577

Run against SQL Server 16.0.4265.3 on 2026-09-13. This is the output we got, not the documentation’s.

Available on

  • SQL Server 2017 and later
  • Azure SQL Database
  • Azure SQL Managed Instance
  • Azure Synapse Analytics
  • Analytics Platform System (PDW)
  • Microsoft Fabric warehouse
  • Fabric SQL database

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Signature and description adapted from the Microsoft SQL documentation, used under the CC BY 4.0. SQL Server and Azure are trademarks of the Microsoft group of companies. This page is not affiliated with Microsoft.