Convert time between any units easily, from days to seconds, weeks to minutes, or even nanoseconds. This tool updates automatically as you type or change units.
1 day = 86,400 seconds
How Many Seconds in a Day? 86,400 seconds. A free, instant tool to convert any time unit to another — seconds, minutes, hours, days, weeks, months, or years.
The How Many Seconds in a Day tool instantly converts between time units — from seconds and minutes to days, years, or even nanoseconds. It updates automatically as you type, giving you quick and accurate results without any extra clicks. Whether you’re a developer, student, or just exploring how time works, this converter makes it simple and clear.