Datumsdifferenz-Rechner — Tage, Monate & Jahre zwischen zwei Daten berechnen
Ermittelt die exakte Zeitspanne zwischen zwei Kalenderdaten in Tagen, Wochen, Monaten und Arbeitsstunden.
Formelherleitung & mathematische Grundlagen
Basiert auf der exakten gregorianischen Epoche unter Berücksichtigung von Schaltjahren.
Variablendefinitionen & Maßeinheiten
Worked Date Interval Calculation
Calculate the exact elapsed time between March 15, 2024 and October 31, 2024 (non-inclusive end date):
The Mechanics of Gregorian Chronology and Leap Years
Computing time intervals across human calendars is mathematically complex due to non-uniform month lengths (28, 29, 30, or 31 days) and solar cycle corrections (quadrennial leap years with centurial 400-year exceptions under the Gregorian reform of 1582).
A naive 30-day assumption creates compounding inaccuracies over multi-month horizons. Calcia's engine decomposes intervals by computing exact days in each intermediate month, adjusting automatically for leap years without relying on lossy arithmetic approximations.
Häufig gestellte Fragen zu Datumsdifferenz-Rechner (Tage zwischen Daten)
Does the calculation include the start and end dates?
By default, standard calendar interval conventions count the starting date and exclude the end date (e.g., from Monday to Tuesday is 1 day). You can toggle 'Include End Date' to add +1 day for inclusive event or hotel stay calculations.
How does the calculator handle leap years?
The calculator accounts for leap years according to the Gregorian rule: a year is a leap year if divisible by 4, except end-of-century years which must be divisible by 400 (e.g., 2000 was a leap year, 2100 will not be).
What is the difference between calendar days and business days?
Calendar days include every sequential day on the calendar (Saturdays, Sundays, and public holidays). Business days only count official working days, typically Monday through Friday.
Can I calculate the number of hours or minutes between two dates?
Yes. The calculator instantly breaks down total days into equivalent hours (days × 24), minutes, and seconds, as well as percentage of the year passed.
Ähnliche Online-Rechner
Häufig zusammen mit Datumsdifferenz-Rechner (Tage zwischen Daten) verwendet.
Arbeitstage-Rechner (Werktage)
Zählt die reinen Arbeits- und Werktage in einem Zeitraum unter Ausschluss von Samstagen, Sonntagen und Feiertagen.
Wochentagsrechner (Wochentag ermitteln)
Findet sofort heraus, auf welchen Wochentag (Montag bis Sonntag) ein beliebiges historisches oder zukünftiges Datum fällt.
Zeitrechner (Stunden & Minuten)
Addiert oder subtrahiert Zeitspannen in Stunden, Minuten und Sekunden für Arbeitszeiten, Flugzeiten und Projekte.