TIME & DATE

Duration arithmetic & work hours calculators

Add elapsed durations, express hour, minute and second components in one unit, or convert minutes to decimal hours. Select the total and unit you need.

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These tools handle elapsed amounts, not clock dates or payroll rules. Total-minute and total-second inputs may exceed 59; component fields retain their displayed bounds. No daylight saving, time zones, breaks or overtime policy is inferred.

7 tools

Add Minutes Calculator
Add two elapsed durations supplied in minutes. Example: First minutes: 30 minutes, Second minutes: 45 minutes gives 75 minutes. Elapsed nonnegative durations only; hours are not wall-clock times. No dates, timezone, midnight crossing or daylight-saving inference.
Adding Hours and Minutes Calculator
Add two supplied elapsed hours/minutes durations as decimal hours. Example: First hours: 1 hours, First minutes component (below 60): 30 minutes component, Second hours: 2 hours, Second minutes component (below 60): 15 minutes component gives 3.75 hours. Elapsed nonnegative durations only; hours are not wall-clock times. Minutes component 0..59.999. No dates, timezone, midnight crossing or dayligh
Adding Hours Calculator
Add two elapsed durations supplied in decimal hours. Example: First hours: 1.5 hours, Second hours: 2.25 hours gives 3.75 hours. Elapsed nonnegative durations only; hours are not wall-clock times. No dates, timezone, midnight crossing or daylight-saving inference.
Hours and Minutes Calculator
Convert supplied elapsed hours/minutes into decimal hours. Example: Hours: 1 hours, Minutes component (below 60): 30 minutes component gives 1.5 hours. Elapsed nonnegative durations only; hours are not wall-clock times. Minutes component 0..59.999. No dates, timezone, midnight crossing or daylight-saving inference. Result is decimal hours, not HH.MM notation. Fractional minute input permitted.
Minutes to Decimal Calculator
Convert elapsed minutes to decimal hours. Example: Minutes: 90 elapsed minutes gives 1.5 hours. Elapsed minutes only; output decimal hours, not hours.minutes digits. No timestamps or calendar conversion.
Time to Minutes Calculator
Convert supplied elapsed hours/minutes into total minutes. Example: Hours: 1 hours, Minutes component (below 60): 30 minutes component gives 90 minutes. Elapsed nonnegative durations only; hours are not wall-clock times. Minutes component 0..59.999. No dates, timezone, midnight crossing or daylight-saving inference.
Time to Seconds Calculator
Convert supplied elapsed hours/minutes/seconds into total seconds. Example: Hours: 1 hours, Minutes component (below 60): 30 minutes component, Seconds component (below 60): 15 seconds component gives 5415 seconds. Elapsed nonnegative durations only; hours are not wall-clock times. Minutes component 0..59.999. No dates, timezone, midnight crossing or daylight-saving inference. Seconds component 0.

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