Day

d

Commonly Used Scientific Unit

The day is one of humanity's oldest and most natural time units, based on Earth's rotation. It forms the foundation of calendars, schedules, and daily rhythms worldwide.

Quick Converter

1 d = s

Controls display format. Very small or very large numbers will be shown in scientific notation (e.g., 1.5e-6).

Day (d)

The day is one of humanity’s oldest and most natural time units, based on Earth’s rotation. It forms the foundation of calendars, schedules, and daily rhythms worldwide.

Characteristics

  • Time unit
  • 1 day = 24 hours
  • 1 day = 1,440 minutes
  • 1 day = 86,400 seconds
  • Earth cycle: represents one complete rotation
  • Common in: calendars, schedules, deadlines

Conversions

  • 1 d = 24 h
  • 1 d = 1440 min
  • 1 d = 86,400 s
  • 1 d = 86,400,000 ms
  • 1 d = 0.14286 weeks
  • 7 d = 1 week

Related Units

Used In Regions

International Worldwide
← Back to Time