Time Unit Converter

Time units let people describe durations at a scale appropriate to the task. Seconds work well for short events, minutes and hours organize daily schedules, and days or weeks suit projects and travel. Months and years describe much longer periods, but unlike the smaller units they do not always contain a fixed number of calendar days. This converter provides exact relationships for fixed units and clearly defined averages for months and years. The second is the common base used by the calculator. One minute contains 60 seconds, one hour contains 3,600 seconds, one day contains 86,400 seconds, and one seven-day week contains 604,800 seconds. A conversion first multiplies the entered amount by the source unit's number of seconds, then divides by the destination unit's factor. This method supports every direction with one consistent calculation. Calendar units require a convention. Individual months range from 28 to 31 days, so this converter uses the average Gregorian month of 30.4375 days, or 2,629,800 seconds. A year uses 365.25 days, or 31,557,600 seconds, reflecting the long-term average that accounts for leap years. These values are appropriate for estimating continuous durations, rates, and broad schedules. They are not a substitute for calendar arithmetic when a deadline depends on named dates. For example, adding one calendar month to January 31 does not have a universal duration in seconds because the result depends on the year and the chosen date-handling rule. If you need an exact appointment date, use a calendar that understands month lengths, leap years, daylight saving transitions, and local time zones. If you need to compare durations or convert a rate based on average years, the factors here are convenient and reproducible. The converter accepts decimal amounts, making it useful for values such as 1.5 hours, 2.25 days, or half a year. Results are shown with up to eight decimal places and ten significant digits, preventing long floating-point tails while preserving useful precision. Use it for payroll estimates, study plans, media durations, scientific observations, project timelines, exercise tracking, and travel planning. Always consider whether your problem describes elapsed time, where fixed seconds are appropriate, or civil calendar time, where dates and location-specific clock changes may also matter.