How Many Seconds in a Day?

There are 86,400 seconds in a day. This is based on 24 hours x 60 minutes x 60 seconds.

How many seconds in a day? — see the answer and conversion table below.

Use the related converter below for custom values.

Formula

Answer: There are 86,400 seconds in a day. This is based on 24 hours x 60 minutes x 60 seconds.

Example

Question: How many seconds in a day? Answer: There are 86,400 seconds in a day. This is based on 24 hours x 60 minutes x 60 seconds.

How to Use

  1. Read the direct answer at the top of the page
  2. Check the conversion table for common values
  3. Use the related converter for custom values
  4. Browse the FAQ for common follow-up questions

Frequently Asked Questions

How many seconds in a 24 hour day?

There are exactly 86,400 seconds in a 24-hour day (24 x 60 x 60 = 86,400).

How many seconds in a year?

There are 31,536,000 seconds in a standard year (365 days). A leap year has 31,622,400 seconds.

How many milliseconds in a day?

There are 86,400,000 milliseconds in a day (86,400 seconds x 1,000).

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Author: Calczy Editorial Team Reviewed by: Calczy Editorial Team Last updated: 2026-09-16

This page was reviewed for accuracy by the Calczy editorial team. Our editorial process follows our editorial policy to ensure reliable, up-to-date conversion tools and reference content.