What is day?

A day is a unit of time equal to 24 hours, corresponding to one full rotation of the Earth. It is the primary unit for calendars, deadlines, event scheduling, and date-based calculations.

What is second?

The second is the SI base unit of time. It is used globally in science, engineering, computing, and everyday life, and is the foundation upon which all other time units are built.

Worked examples

1 day = 86,400 second

1 second = 1 second

More Time conversions

• Convert day to second
• Convert day to minute
• Convert day to hour
• Convert day to week
• Convert day to year (365 d)
• Convert day to millisecond
• Convert day to microsecond
• Convert day to nanosecond
• Convert day to century (100 yr)

Assumption: year is defined as 365 days and century values are approximate.