Hours And Minutes Adder Calculator

Work out hours and minutes adder instantly with clear inputs, formula shown and shareable results.

About Hours And Minutes Adder Calculator

Adding durations in hours and minutes needs base-60 carrying: 2:45 plus 3:50 is 395 minutes, which is 6:35 rather than the 5:95 that naive addition suggests. Converting everything to minutes, summing and converting back removes the carrying error entirely.

Formulas

Total minutes

total = sum of (hours x 60 + minutes)

Formatted result

hours = floor(total / 60), minutes = total mod 60

Worked example

With the default values below, Hours And Minutes Adder Calculator returns Total Duration of 6.583. Change any input above and every figure here is recalculated in your browser.

Inputs used

First duration hoursminimum 0: 2
First duration minutesminimum 0: 45
Second duration hoursminimum 0: 3
Second duration minutesminimum 0: 50

Results

Total Duration: 6.583 h
Total As h:mm: 6:35
Total Minutes: 395
Minutes Beyond The Whole Hours: 35

Step by step

1Values used
2Total minutes
3Formatted result
4Total Duration= 6.583 h
5Total As h:mm= 6:35
6Total Minutes= 395
7Minutes Beyond The Whole Hours= 35

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why can't I just add the columns?

Because minutes carry at 60, not 100. Adding 45 and 50 gives 95 minutes, which must become one hour and 35 minutes.

Does this work for more than two durations?

The same method extends to any number - convert each to minutes, sum, then convert once at the end.