날짜 및 시간 계산기
날짜 간 일수, 정확한 나이, 영업일, 시간대, Unix 타임스탬프, ISO 주 번호와 일출·일몰 시간을 계산하세요.
계산기 15개 · 검증된 예제 87개
알맞은 계산 찾기
- Hours worked when the clocks change
Use dates and a time zone to distinguish clock readings from elapsed time, including repeated hours and unpaid breaks.
- A deadline that skips weekends and holidays
Add or subtract working days, choose the weekend pattern and supply the holidays that apply to your calendar.
- A meeting that works across time zones
Convert the meeting's actual date and compare working-hour overlaps, including seasonal changes in the time difference.
날짜
- 날짜에 일수 더하기 또는 빼기
시작일에서 지정한 일·주·개월·년 또는 영업일 수만큼 앞뒤 날짜를 구하고 요일과 이동한 달력상의 일수를 표시합니다.
- 나이 계산기
생년월일에서 원하는 날짜의 정확한 나이를 연·월·일로 계산하고, 다음 생일과 월·주·일·시간 단위의 나이도 표시합니다.
- 두 날짜 사이의 일수 계산기
두 날짜 사이의 간격을 일수, 연·월·일, 주와 시간으로 계산하고, 주말과 직접 지정한 휴일을 제외한 영업일도 계산합니다.
- Business days calculator: add working days to a date
The deadline N business days after or before a start date, skipping weekends and the holidays you list, with the calendar days it spans.
시간
- 특정 날짜까지 카운트다운 계산기
모든 시간대에서 지정한 날짜와 시각까지 남거나 지난 일·시·분·초를 실시간으로 표시하고 시각 변경을 반영합니다.
- Hours calculator: hours between two times and weekly timesheet
Calculate work hours, breaks and weekly timesheets. Use dates and a time zone for overnight shifts across daylight-saving changes and repeated hours.
- Military time converter (24-hour time)
Military time converter: 12-hour to 24-hour time and back, how it is spoken, time-zone letters with the Zulu equivalent, and a full-day chart.
- 시간대 변환 및 회의 일정 도구
한 시간대의 시각을 최대 12개 다른 시간대의 현지 시각으로 변환합니다. 일광 절약 시간을 반영하고 회의 일정 표를 제공합니다.
- Unix timestamp converter
Unix timestamp converter: epoch seconds, milliseconds, microseconds or nanoseconds to an ISO 8601 UTC date and local time, and dates back to epoch time.
- Time calculator: add and subtract hours and minutes
Add and subtract hours, minutes and seconds from a list of durations, with the total as H:MM:SS, decimal hours, minutes and seconds.
달력
- Calendar converter (Hijri, Hebrew, Persian, Julian)
Convert a Gregorian date to Hijri (Umm al-Qura and tabular), Hebrew, Persian, Indian national (Saka) and Julian dates, or a Julian date back.
- Day of the week calculator
Day of the week for any date, past or future: the weekday in the Gregorian calendar, worked through step by step with Zeller's congruence.
- Leap year checker
Leap year checker: whether a year has 366 days under the Gregorian rule, which test decides it, and the previous and next leap years.
- Week number and day of year
Week number for any date: ISO 8601 week and week-numbering year, US week number, day of the year, days left in the year and the quarter.
태양과 하늘
계산기 선택 방법: 날짜와 시간
Calendar dates or elapsed time?
A date difference counts calendar boundaries; elapsed hours compare instants. Choose the date tool for days between events, the age tool for completed years and months, and the hours tool for shifts or timesheets. Decide whether to include the first or last day. For a deadline, choose working days and supply the weekend pattern and holidays that apply to your organization. A holiday calendar from another region can produce a plausible but incorrect due date.
Use the event's date and time zone
Clock readings can repeat or disappear when daylight-saving time changes. Enter the actual dates and named time zone when you need elapsed time across such a change. A fixed UTC offset describes one offset, not a region's seasonal rules. Unix timestamps represent instants; confirm whether your source counts seconds or milliseconds. For recurring meetings, compare more than one date because different regions change their clocks on different schedules.
Hours across clock changes · Meeting planner · Unix timestamps