Hours Calculator

🕐 Understanding the Hour & Time Formats

🕓 What is an Hour?

• 1 hour = 60 minutes
• 1 minute = 60 seconds
• 1 day = 24 hours

Seconds are defined scientifically based on the vibrations of a cesium atom. Hours Calculator

🕰️ Time Formats

🕛 12-Hour Clock

• Uses numbers 1 to 12
• Divides the day into:
  • AM (ante meridiem): before midday
  • PM (post meridiem): after midday
• 12 AM = midnight
• 12 PM = noon
• May cause confusion; terms like “12 noon” or “12 midnight” help clarify.

🕕 24-Hour Clock (Military Time)

• Uses numbers 0 to 23
• 00:00 = midnight, 12:00 = noon, 23:59 = 11:59 PM
• No AM/PM needed—used in military, transport, and international standards for clarity.

⏳ Hours in Different Time Periods