Time Converter

There are exactly 86,400 seconds in a day. This is calculated as 24 hours × 60 minutes × 60 seconds = 86,400. This is constant for calendar days, though actual solar days vary slightly.

A regular year has 8,760 hours (365 days × 24 hours). A leap year has 8,784 hours (366 × 24). On average, accounting for leap years, a year has about 8,765.82 hours (365.25 × 24).

Divide the number of minutes by 60. For example, 150 minutes ÷ 60 = 2.5 hours = 2 hours 30 minutes. For the reverse, multiply hours by 60 to get minutes.

A year has approximately 52.18 weeks (365.25 days ÷ 7). This is why some years have 52 weeks and others have 53 weeks on the calendar. A fiscal year or planning year typically uses 52 weeks.

Months vary: 28-31 days. January, March, May, July, August, October, December have 31 days. April, June, September, November have 30 days. February has 28 days (29 in leap years). Average: 30.44 days.

A leap year has 366 days instead of 365, with February having 29 days. Leap years occur every 4 years (divisible by 4), except century years must be divisible by 400. So 2000 was a leap year, but 1900 wasn't.

The whole number is hours. Multiply the decimal by 60 to get minutes. For example, 2.75 hours: 2 hours + (0.75 × 60) = 2 hours 45 minutes. For 1.5 hours: 1 hour + (0.5 × 60) = 1 hour 30 minutes.

Million seconds ≈ 11.6 days. Billion seconds ≈ 31.7 years. Human lifespan (80 years) ≈ 2.5 billion seconds. Age of Earth (4.5 billion years) ≈ 1.4 × 10^17 seconds. Time since dinosaurs (65 million years) ≈ 2 × 10^15 seconds.