How do I convert 01:30 into decimal hours?

The tool adds hours, minutes divided by 60, and seconds divided by 3600. Thus 01:30 gives 1.5 hours before your selected decimal formatting.

Which time formats does the decimal-hours converter accept?

Use hours and minutes, with optional seconds, separated by colons or periods. The parser reports an input-format message for a line it cannot interpret.

Does 1.30 mean one hour and thirty minutes in decimal time?

No. Decimal hours use base-10 fractions, so thirty minutes equals 0.5 hours. Use the time notation input to convert minutes before treating the result as decimal hours.

Time to decimal Converter

Tool workspace

Your input stays in this browser.

Needs input

You can run the tool again after any change.

Time values

Time options

Decimal places

Your result appears here

Express hours, minutes, and seconds as a decimal value. Enter the date or time values, choose the format, then review the result.

This tool runs open-source code from OmniTools (MIT License). See open-source credits.

Time to decimal Converter adds hours, minutes divided by 60, and seconds divided by 3600.

It returns 1.5 and 2.258333 hours before selected formatting. The operation runs in your browser. Processing runs in the browser.

Instructions

Provide text or data for this tool.
Enter hours and minutes with optional seconds.
Use colons or periods between components.
Review format errors by input line.

Example

Input: 01:30 02:15:30

Settings: Time to decimal Converter: Use colon-separated time notation.

Result: It returns 1.5 and 2.258333 hours before selected formatting. The operation runs in your browser.

Limits

Time to decimal Converter: Decimal hours use base-10 fractions.
Time to decimal Converter: It does not interpret a date or timezone.
Time to decimal Converter: Invalid time notation produces an input-format error.