Time Converter
Convert between Second, Minute, Hour and more — step-by-step working shown.
Conversion
How this works
Enter a value to see the working
Quick reference
Common conversions from Day
Showing common units only. See all 19 units on unitconvert.to →
Related tools
What is a Time Converter?
A time converter helps you change a duration from one unit to another, like seconds to hours or days to weeks. This is useful for understanding how long things really take, whether you're planning a project, timing an event, or just trying to grasp vast periods of history.
The main challenge with time conversions is that units don't always follow a simple decimal system. For example, there are 60 seconds in a minute and 60 minutes in an hour, not 100. Also, the number of days in a month or year can vary, making some conversions less exact.
How to Convert Hours to Seconds
Convert Hours to Minutes
Multiply the number of hours by 60 to find the equivalent number of minutes. For example, 2 hours × 60 minutes/hour = 120 minutes.
Convert Minutes to Seconds
Multiply the number of minutes by 60 to find the equivalent number of seconds. For example, 120 minutes × 60 seconds/minute = 7200 seconds.
Combine the Steps
You can do this in one go by multiplying the hours by 3600 (since 60 × 60 = 3600). The formula is: Seconds = Hours × 3600.
Conversions in context
Flight Duration
7 hours → 420 minutes
Baking Time
45 minutes → 2700 seconds
Football Match
90 minutes → 1.5 hours
Chemical Reaction
3 days → 72 hours
School Term
13 weeks → 91 days
Project Deadline
2 years → 730.5 days
Common mistakes to avoid
- I need to be there in 1.5 hours, so that's 1 hour and 50 minutes:Time uses a base-60 system for minutes and seconds, not base-10. You can't treat the decimal part of an hour as minutes directly. 1.5 hours is 1 hour and 30 minutes, because 0.5 hours × 60 minutes/hour = 30 minutes.
- To convert 120 minutes to hours, I divide by 100:There are 60 minutes in an hour, not 100. Dividing by 100 would give an incorrect result. To convert 120 minutes to hours, you divide by 60, which equals 2 hours.
- There are exactly 365 days in every year, so 10 years is 3650 days:This calculation ignores leap years, which add an extra day every four years, making the average year slightly longer. On average, a year has 365.25 days. So, 10 years is closer to 3652.5 days when accounting for leap years.
Questions people ask
How many seconds are in a year?
A standard year has 365 days, but accounting for leap years, an average year is 365.25 days long. This means there are 365.25 days × 24 hours/day × 60 minutes/hour × 60 seconds/minute = 31,557,600 seconds in an average year.
How do I convert hours and minutes to decimal hours?
To convert minutes to a decimal, divide the number of minutes by 60. Then, add this decimal value to the whole number of hours. For example, 2 hours and 30 minutes is 2 + (30/60) = 2 + 0.5 = 2.5 decimal hours.
How many weeks in a year?
There are 52 weeks in a standard year, with one or two extra days remaining. Since a year has 365 days (or 366 in a leap year), and a week has 7 days, 365 divided by 7 equals 52 with a remainder of 1. So, it's 52 weeks and 1 day (or 2 days in a leap year).
Why is a month not a precise unit of time?
Months vary in length, having 28, 29, 30, or 31 days. This makes them imprecise for exact calculations without specifying which month. The calendar system was developed to align with lunar cycles and seasons, leading to these variations.
How long is a billion seconds in years?
A billion seconds is a very long time! Using the average year length of 31,557,600 seconds, one billion seconds (1,000,000,000) is approximately 1,000,000,000 / 31,557,600 = 31.69 years. So, a billion seconds is roughly 31 years and 8 months.