How do I convert HH:MM to total minutes?

Enter hours and minutes in the HH:MM format. The converter multiplies hours by 60 and adds the minutes to give you the total minutes. For example, 1:30 becomes 90 minutes.

What is decimal hours and how is it calculated?

Decimal hours represent time as a fraction of an hour. For HH:MM, divide minutes by 60 and add to hours. For instance, 1:30 is 1.5 decimal hours. This is useful for payroll or time tracking.

Can I convert between any time units like milliseconds to years?

Yes, the converter supports milliseconds, seconds, minutes, hours, days, weeks, months, and years. Enter a value in one unit and select the target unit to get the equivalent.

Umrechnungen

Sofort, privat und kostenlos

Zeiteinheiten-Umrechner.

Konvertieren Sie zwischen Millisekunden, Sekunden, Minuten, Stunden, Tagen, Wochen, Monaten und Jahren – plus HH:MM in Gesamtminuten und Dezimalstunden.

Dieser Rechner ist noch nicht vollständig übersetzt – einige Texte werden auf Englisch angezeigt.

Berechnung auf dem GerätKeine Anmeldung

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Ergebnisse werden während der Eingabe aktualisiert.

02 / ANTWORT

Zu konvertierender Wert

Von

Bis

Konvertierter Wert

Aufschlüsselung

Gesamtsekunden3.600

HH:MM in Minuten und Dezimalstunden

Zeit (HH:MM)

Gesamtminuten: 450
Dezimalstunden: 7.5

Hinweis: Monate und Jahre sind Näherungswerte. 1 Monat = 30,436875 Tage und 1 Jahr = 365,2425 Tage, der gregorianische Kalendermittelwert. Alle anderen Einheiten sind exakt.

So geht's

Monate und Jahre haben keine feste Länge. Dieser Konverter verwendet den gregorianischen Mittelwert: 1 Jahr = 365,2425 Tage (31.556.952 Sekunden) und 1 Monat = ein Zwölftel davon = 30,436875 Tage (2.629.746 Sekunden). Millisekunden bis Wochen sind exakt.

Cite this calculator

Canonical URL: https://mathify.one/de/conversion/time

Cite as: Mathify. (n.d.). Zeiteinheiten-Umrechner. https://mathify.one/de/conversion/time

Use Cases

Project Time Estimation

Convert durations between units to plan tasks, track deadlines, or estimate total time in hours or minutes.

Example: Convert 3 days to hours to see it's 72 hours.

Payroll and Billing

Convert HH:MM timesheets to decimal hours for accurate payroll calculations or client billing.

Example: Convert 8:45 to 8.75 decimal hours.

Frequently Asked Questions

How do I convert HH:MM to total minutes?: Enter hours and minutes in the HH:MM format. The converter multiplies hours by 60 and adds the minutes to give you the total minutes. For example, 1:30 becomes 90 minutes.
What is decimal hours and how is it calculated?: Decimal hours represent time as a fraction of an hour. For HH:MM, divide minutes by 60 and add to hours. For instance, 1:30 is 1.5 decimal hours. This is useful for payroll or time tracking.
Can I convert between any time units like milliseconds to years?: Yes, the converter supports milliseconds, seconds, minutes, hours, days, weeks, months, and years. Enter a value in one unit and select the target unit to get the equivalent.

Tips & Common Mistakes

Tips

When converting months, note that the converter uses an average month length (30.44 days) for consistency.
For HH:MM input, ensure you use the colon separator (e.g., 2:30) to get correct results.
Double-check your input units and target units to avoid conversion errors.
Use the converter for quick estimates; for precise scientific calculations, consider leap years and exact month lengths.

Common Mistakes to Avoid

Forgetting to select the correct target unit, leading to wrong conversions.
Entering HH:MM without the colon, e.g., '230' instead of '2:30', which may be interpreted as 230 minutes.
Assuming months are exactly 30 days; the converter uses an average, so results may differ from calendar months.

Last updated: August 13, 2026