Datums- und Zeitrechner
Berechne Datumsabstände, Alter, Arbeitstage, Zeitzonen, Unix-Zeitstempel, ISO-Kalenderwochen sowie Sonnenaufgang und Sonnenuntergang.
15 Rechner · 87 geprüfte Beispiele
Die passende Berechnung finden
- 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.
Datumswerte
- Tage zu einem Datum addieren oder davon abziehen
Finde das Datum eine Anzahl von Tagen, Wochen, Monaten, Jahren oder Arbeitstagen vor oder nach einem Startdatum, samt Wochentag und Verschiebung in Kalendertagen.
- Altersrechner
Berechne das genaue Alter ab dem Geburtsdatum für jeden Stichtag in Jahren, Monaten und Tagen, samt nächstem Geburtstag und Alter in Monaten, Wochen, Tagen und Stunden.
- Rechner für Tage zwischen zwei Daten
Berechne den Abstand zwischen zwei Daten in Tagen, Jahren, Monaten, Wochen und Stunden sowie Arbeitstage ohne Wochenenden und selbst gewählte Feiertage.
- 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.
Zeit
- Countdown-Rechner bis zu einem Datum
Verfolge Tage, Stunden, Minuten und Sekunden bis zu oder seit einem Datum mit Uhrzeit in jeder Zeitzone, live und unter Berücksichtigung von Zeitumstellungen.
- 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.
- Zeitzonenrechner und Besprechungsplaner
Rechne eine Uhrzeit in die Ortszeit von bis zu 12 weiteren Zeitzonen um, mit Sommerzeitregelung und einem Raster zur Besprechungsplanung.
- 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.
Kalender
- 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.
Sonne und Himmel
Den passenden Rechner wählen: Datum und Uhrzeit
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