 Online Calculators

# Time Calculator | Add, Subtract, Multiply, Divide Time

Time Calculator
days
hours
minutes
seconds

_ days _ hours _ minutes _ seconds

_ total days
_ total hours
_ total minutes
_ total seconds

## Calculator Use

Time calculator to add, subtract, multiply and divide time in days, hours, minutes and seconds.

The calculator can add and subtract time segments or multiply and divide time by a number or decimal. Answers include equivalent time in total days, hours, minutes or seconds.

## How to Calculate Time

How to do math operations with time is explained below. See examples of adding, subtracting, multiplying and dividing segments of time.

Add days, hours, minutes and seconds working from smallest unit of time to largest.

2. If total seconds is greater than 59, subtract 60 from seconds and carry 1 to minutes
3. Add the minutes including any carried over from calculating seconds
4. If total minutes is greater than 59, subtract 60 from minutes and carry 1 to hours
5. Add the hours including any carried over from calculating minutes
6. If total hours is greater than 24, subtract 24 from hours and carry 1 to days
7. Add the days including any carried over from calculating hours

Add 2 days 21 hours 45 minutes 39 seconds to 5 days 10 hours 45 minutes 22 seconds

2 days
21 hours
45 minutes
39 seconds
+
5 days
10 hours
45 minutes
22 seconds

• 39 seconds + 22 seconds = 61 seconds
carry

2 days
21 hours
45 minutes
39 seconds
+
5 days
10 hours
45 minutes
22 seconds
=
61 seconds

• 61 seconds - 60 = 1 second, carry 1 to minutes
• 1 minute + 45 minutes + 45 minutes = 91 minutes
carry
1 minute

2 days
21 hours
45 minutes
39 seconds
+
5 days
10 hours
45 minutes
22 seconds
=
91 minutes
1 seconds

• 91 minutes - 60 = 31 minutes, carry 1 to hours
• 1 hour + 21 hours + 10 hours = 32 hours
carry
1 hour
1 minute

2 days
21 hours
45 minutes
39 seconds
+
5 days
10 hours
45 minutes
22 seconds
=
32 hours
31 minutes
1 seconds

• 32 hours - 24 = 8 hours, carry 1 to days
• 1 day + 2 days + 5 days = 8 days
carry
1 day
1 hour
1 minute

2 days
21 hours
45 minutes
39 seconds
+
5 days
10 hours
45 minutes
22 seconds
=
8 days
8 hours
31 minutes
1 seconds

• Completed Adding Time Math Problem

2 days
21 hours
45 minutes
39 seconds
+
5 days
10 hours
45 minutes
22 seconds
=
8 days
8 hours
31 minutes
1 seconds

### How to Subtract Time

Subtract days, hours, minutes and seconds working from smallest unit of time to largest.

1. Subtract the seconds
2. If the seconds you are subtracting is greater than the top number, borrow 1 minute from the top minutes and add 60 to the top seconds. Then subtract.
3. Subtract the minutes
4. If the minutes you are subtracting is greater than the top number, borrow 1 hour from the top hours and add 60 to the top minutes. Then subtract.
5. Subtract the hours
6. If the hours you are subtracting is greater than the top number, borrow 1 day from the top days and add 24 to the top hours. Then subtract.
7. Subtract the days

Note that in any case where you need to borrow, if the next highest unit is 0 then borrow from the 2nd highest unit. Just as you would in long subtraction, borrow from the next highest place value.

#### Subtracting Time Example Problem

Subtract 2 days 21 hours 56 minutes 18 seconds from 5 days 0 hours 10 minutes 13 seconds

5 days
0 hours
10 minutes
13 seconds
2 days
21 hours
56 minutes
18 seconds

• Subtract seconds
• 13 seconds is less than 18 seconds so borrow 1 from the top minutes
• 1 minute = 60 seconds so add 60 seconds to 13 to get 73
• 73 seconds - 18 seconds = 55 seconds
borrow
1 minute

5 days
0 hours
9 minutes
73 seconds
2 days
21 hours
56 minutes
18 seconds
=
55 seconds

• Subtract minutes
• 9 minutes is less than 56 minutes so borrow 1 from hours
• There are 0 hours so borrow 1 from days
• 1 day = 24 hours and 1 hour = 60 minutes, so add 24 to hours, then borrow 1 from hours to leave 23
• Add 60 minutes to 9 to get 69
• 69 minutes - 56 minutes = 13 minutes
borrow
1 day
1 hour
1 minute

4 days
23 hours
69 minutes
73 seconds
2 days
21 hours
56 minutes
18 seconds
=
13 minutes
55 seconds

• Subtract hours
• 23 hours - 21 hours = 2 hours
borrow
1 day
1 hour
1 minute

4 days
23 hours
69 minutes
73 seconds
2 days
21 hours
56 minutes
18 seconds
=
2 hours
13 minutes
55 seconds

• Subtract days
• 4 days - 2 days = 2 days
borrow
1 day
1 hour
1 minute

4 days
23 hours
69 minutes
73 seconds
2 days
21 hours
56 minutes
18 seconds
=
2 days
2 hours
13 minutes
55 seconds

• Completed Subtracting Time Math Problem

5 days
0 hours
10 minutes
13 seconds
2 days
21 hours
56 minutes
18 seconds
=
2 days
2 hours
13 minutes
55 seconds

### How to Multiply Time

Multiply days, hours, minutes and seconds by a multiple, working from smallest unit of time to largest.

1. Multiply each unit of time by the multiple
2. Working from smallest unit of time to largest, convert excess time units to next higher unit
3. If seconds are greater than 59, divide by 60 to get a whole number and remainder
4. Keep the remainder as total seconds and add the whole number to minutes
5. If minutes are greater than 59, divide by 60 to get a whole number and remainder
6. Keep the remainder as total minutes and add the whole number to hours
7. If hours are greater than 23, divide by 24 to get a whole number and remainder
8. Keep the remainder as total hours and add the whole number to days

#### Multiplying Time Example Problem

Multiply 2 days 10 hours 32 minutes 16 seconds by 5

2 days
10 hours
32 minutes
16 seconds
×
5

• Multiply each unit of time by 5

2 days
10 hours
32 minutes
16 seconds
×
5
=
10 days
50 hours
160 minutes
80 seconds

• 80 seconds is greater than 59 so convert excess to minutes
• 80 divided by 60 equals 1 with a remainder of 20
• Keep 20 seconds and carry the 1 to minutes
• 160 + 1 = 161 minutes
carry
1 minute
=
10 days
50 hours
161 minutes
20 seconds

• 161 minutes is greater than 59 so convert excess to hours
• 161 divided by 60 equals 2 with a remainder of 41
• Keep 41 seconds and carry the 2 to hours
• 50 + 2 = 52 hours
carry
2 hours
1 minute
=
10 days
52 hours
41 minutes
20 seconds

• 52 hours is greater than 24 so convert excess to days
• 52 divided by 24 equals 2 with a remainder of 4
• Keep 4 hours and carry the 2 to days
• 10 + 2 = 12 days
carry
2 day
2 hours
1 minute
=
12 days
4 hours
41 minutes
20 seconds

• Completed Multiplying Time Math Problem

2 days
10 hours
32 minutes
16 seconds
×
5
=
12 days
4 hours
41 minutes
20 seconds

### How to Divide Time

Divide days, hours, minutes and seconds by a divisor, working from smallest unit of time to largest.

1. Divide each unit of time by the divisor
2. Then, working from largest to smallest unit of time, convert any decimal values to whole numbers shifting the decimal amount to a smaller time unit
3. If days has a decimal, keep the whole number as total days and convert the decimal to hours
4. Since 1 day = 24 hours, multiply the decimal by 24 and add the result to hours
5. If hours has a decimal, keep the whole number as total hours and convert the decimal to minutes
6. Since 1 hour = 60 minutes, multiply the decimal by 60 and add the result to minutes
7. If minutes has a decimal, keep the whole number as total minutes and convert the decimal to seconds
8. Since 1 minute = 60 seconds, multiply the decimal by 60 and add the result to seconds
9. If seconds has a decimal, you can usually leave this as your final answer depending on your application

#### Dividing Time Example Problem

Divide 4 days 10 hours 13 minutes 16 seconds by 4

4 days
10 hours
13 minutes
16 seconds
÷
4

• Divide each unit of time by 4

4 days
10 hours
13 minutes
16 seconds
÷
4
=
1 days
2.5 hours
3.25 minutes
4 seconds

• Work from smallest unit of time to leargest convert any decimal values to whole numbers
• Hours is not a whole number so convert the decimal to minutes
• 2.5 hours is 2 hours plus 0.5 hours
• Since 1 hour = 60 minutes, 0.5 of 1 hour equals 0.5 of 60 minutes = 30 minutes
• Keep the 2 hours and carry 30 to minutes
• 30 + 3.25 = 33.25 minutes
carry
30 minutes
=
1 days
2 hours
33.25 minutes
4 seconds

• Minutes is not a whole number so convert the decimal to seconds
• 33.25 minutes is 33 minutes plus 0.25 minutes
• Since 1 minute = 60 seconds, 0.25 of 1 minute equals 0.25 of 60 seconds = 15 seconds
• Keep the 33 minutes and carry 15 to seconds
• 15 + 4 = 19 seconds
carry
30 minutes
15 seconds
=
1 days
2 hours
33 minutes
19 seconds

• Completed Dividing Time Math Problem

4 days
10 hours
13 minutes
16 seconds
÷
4
=
1 days
2 hours
33 minutes
19 seconds

Time Conversion Units
Day
1 day
24 hours
1,440 minutes
86,400 seconds
Hour
1 hour
60 minutes
3,600 seconds
Minute
1 minute
60 seconds
Second
1 second

Cite this content, page or calculator as:

Furey, Edward "Time Calculator | Add, Subtract, Multiply, Divide Time" at https://www.calculatorsoup.com/calculators/time/time-calculator.php from CalculatorSoup, https://www.calculatorsoup.com - Online Calculators