Time Converter
Convert any time value between seconds, minutes, hours, days, weeks, months, and years — all equivalent values shown at once, instantly.
Last updated: March 2026
How to Use the Time Converter
- Enter a time value: Type any number into the input field. Decimals are supported — enter 1.5 for one and a half, or 0.5 for half a unit.
- Select the source unit: Choose the unit your value is in — seconds, minutes, hours, days, weeks, months, or years.
- Read all conversions instantly: All equivalent values appear in the results panel simultaneously with no button to click.
- Share your conversion: Use the Share button to copy a pre-filled link with your exact conversion for colleagues or reference.
Time Conversion Reference Table
The following conversion factors are used by the calculator. All conversions pass through seconds as the base unit.
| Unit | = Seconds | = Minutes | = Hours |
|---|---|---|---|
| 1 Minute | 60 | 1 | 0.01667 |
| 1 Hour | 3,600 | 60 | 1 |
| 1 Day | 86,400 | 1,440 | 24 |
| 1 Week | 604,800 | 10,080 | 168 |
| 1 Month (avg) | 2,629,746 | 43,829 | 730.5 |
| 1 Year (avg) | 31,557,600 | 525,960 | 8,766 |
Month and year values use the Julian average: 1 year = 365.25 days, 1 month = 365.25 ÷ 12 = 30.4375 days.
Understanding Time Units
Time is measured using a hierarchy of units, each a fixed multiple of the one below it — except for months and years, which vary slightly due to the calendar system.
Fixed Conversions: Seconds, Minutes, Hours, Days, Weeks
The smallest commonly used unit is the second, defined as the base SI unit of time. From seconds upward, conversions are exact and universal:
- 1 minute = 60 seconds (exact)
- 1 hour = 3,600 seconds (exact)
- 1 day = 86,400 seconds (exact)
- 1 week = 604,800 seconds (exact)
Variable Conversions: Months and Years
Months and years introduce variability because the Gregorian calendar has months of different lengths and accounts for Earth's slightly irregular orbital period around the Sun. For calculation purposes, we use the Julian average:
- 1 year = 365.25 days (accounting for the leap year every 4 years)
- 1 month = 365.25 ÷ 12 = 30.4375 days (average across all months)
This means a conversion from "6 months" to days gives 182.625 days rather than a whole number. When working with specific calendar months, use our Date Difference Calculator for exact day counts.
When Does the Conversion Method Matter?
For most practical uses — estimating project timelines, understanding billing cycles, or converting a duration for reference — the Julian averages are perfectly adequate. For legal, contractual, or financial calculations where exact calendar dates matter, always work with specific dates rather than unit conversions. A "3-month contract" starting January 15 ends on April 15, not 91.3125 days later.
How Long Is [Time] If You Convert It?
How many seconds are in 1 hour?
There are exactly 3,600 seconds in 1 hour (60 seconds × 60 minutes). This is one of the most frequently needed time conversions in programming, science, and everyday calculations.
How many hours are in a week?
There are exactly 168 hours in one week (7 days × 24 hours). This is commonly used for calculating weekly work hours (a 40-hour work week represents about 23.8% of all hours in the week) and for planning total project capacity.
How many minutes are in a day?
There are exactly 1,440 minutes in one day (24 hours × 60 minutes). If you sleep 8 hours, you have 960 waking minutes. Productivity experts often reference this to help people appreciate how much time is available each day.
How many days are in a year?
A standard year has 365 days; a leap year has 366 days. The average over the 4-year leap cycle is 365.25 days per year. For financial calculations, some industries use a "360-day year" (12 months of 30 days each) for simplicity.
How many seconds are in a day?
There are exactly 86,400 seconds in one day (24 × 60 × 60). This is a fundamental constant in computing — Unix timestamps count seconds elapsed since January 1, 1970, and many programming APIs measure durations in seconds.
How do you convert 90 minutes to hours?
90 minutes equals 1.5 hours (90 ÷ 60 = 1.5). In the Time Converter, select "Minutes" as the from unit, enter 90, and you'll instantly see 1.5 hours displayed alongside all other conversions.
How many weeks are in a year?
A standard year has 52 weeks and 1 day (365 ÷ 7 = 52.143 weeks). A leap year has 52 weeks and 2 days. ISO week date systems number weeks 1–52 (or 53 in years that start or end on a Thursday), which is why some years have a "week 53."
How long is 1 million seconds?
1,000,000 seconds equals approximately 11.57 days (1,000,000 ÷ 86,400 = 11.574). For context: 1 billion seconds is about 31.7 years, and 1 trillion seconds is about 31,700 years. Enter 1000000 in the seconds field of the converter to see all equivalents instantly.
People Also Search For
How to convert hours to seconds
To convert hours to seconds, multiply the number of hours by 3,600. For example, 2.5 hours = 2.5 × 3,600 = 9,000 seconds. Select "Hours" in the Time Converter, enter your value, and the seconds result appears automatically.
How to convert minutes to days
To convert minutes to days, divide by 1,440 (the number of minutes in a day). For example, 2,880 minutes ÷ 1,440 = 2 days. Select "Minutes" in the converter for instant results across all units.
How many work hours in a year
A standard full-time work year has approximately 2,080 hours (52 weeks × 40 hours). Subtract public holidays (approximately 10–11 in the US = 80–88 hours) for a more realistic figure of about 1,992–2,000 actual work hours per year. Part-time roles scale proportionally.
Seconds to hours converter
To convert seconds to hours, divide by 3,600. For example, 7,200 seconds ÷ 3,600 = 2 hours. The Time Converter handles this automatically — select "Seconds," enter your value, and the hours conversion appears in the results panel.
How many hours in 30 days
30 days equals exactly 720 hours (30 × 24 = 720). This is commonly needed when converting monthly subscription billing cycles, server uptime calculations, or medical dosing schedules expressed in daily doses over a 30-day period.
Frequently Asked Questions
How many seconds are in a minute?
There are exactly 60 seconds in 1 minute. This is a fixed, internationally standardised conversion factor used in all time systems worldwide.
How many seconds are in an hour?
There are exactly 3,600 seconds in 1 hour (60 seconds × 60 minutes = 3,600). For 24 hours there are 86,400 seconds (3,600 × 24).
How many seconds are in a day?
There are exactly 86,400 seconds in one calendar day (24 hours × 60 minutes × 60 seconds = 86,400).
How many hours are in a year?
A standard year has 8,760 hours (365 days × 24 hours). A leap year has 8,784 hours (366 days × 24 hours). On average, accounting for the leap year cycle, a year has approximately 8,765.82 hours.
How many days are in a month?
Months have 28, 29, 30, or 31 days depending on the month and whether it is a leap year. For conversion purposes, 1 month is approximated as 30.4375 days (365.25 ÷ 12), which accounts for the average over a four-year leap year cycle.
How do I convert hours to minutes?
To convert hours to minutes, multiply the number of hours by 60. For example, 3.5 hours = 3.5 × 60 = 210 minutes. The Time Converter does this automatically for any input value.
How many weeks are in a year?
A standard year has 52 weeks and 1 day (365 ÷ 7 = 52.14 weeks). A leap year has 52 weeks and 2 days. For general calculations, 1 year is commonly treated as 52.18 weeks.
How many minutes are in a day?
There are exactly 1,440 minutes in one day (24 hours × 60 minutes = 1,440). In a week there are 10,080 minutes (7 × 1,440).
How do I convert days to hours?
To convert days to hours, multiply the number of days by 24. For example, 7 days = 7 × 24 = 168 hours. Two weeks (14 days) = 14 × 24 = 336 hours.
Why does 1 month not equal exactly 4 weeks?
Four weeks equals exactly 28 days, but most months have 30 or 31 days. This means months are slightly longer than 4 weeks on average. Over a year, this adds up to approximately 1.21 extra weeks. This is why calendars use months that do not align perfectly with 7-day weeks.