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.

Конвертеры

Мгновенно, конфиденциально и бесплатно

Конвертер единиц времени.

Конвертируйте между миллисекундами, секундами, минутами, часами, днями, неделями, месяцами и годами, а также ЧЧ:ММ в общее число минут и десятичные часы.

Этот калькулятор пока переведён не полностью — часть текста отображается на английском.

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Введите значения

Результаты обновляются во время ввода.

02 / ОТВЕТ

Value to convert

Из

Converted value

Разбор

Всего секунд3 600

HH:MM as minutes and decimal hours

Time (HH:MM)

Всего минут: 450
Decimal hours: 7.5

Note: months and years are approximations. 1 month = 30.436875 days and 1 year = 365.2425 days, the Gregorian calendar mean. All other units are exact.

Как пользоваться

Months and years are not fixed lengths. This converter uses the Gregorian mean: 1 year = 365.2425 days (31,556,952 seconds) and 1 month = one twelfth of that = 30.436875 days (2,629,746 seconds). Milliseconds through weeks are exact.

Cite this calculator

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

Cite as: Mathify. (n.d.). Конвертер единиц времени. https://mathify.one/ru/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