Time Adder: How to Add Hours and Minutes Correctly
Add several shift totals, task times, or project blocks without mixing minutes and decimal hours. Examples and a free time adder.
Use clock math for clock time
A time adder adds clock-style entries such as 1:45, 2:30, and 0:50. Add the minutes, carry every 60 minutes into 1 hour, and then add the hours. So 1:45 + 2:30 + 0:50 is 3 hours plus 125 minutes, or 5:05. The Add Time Calculator handles up to five rows at once.
Convert only after you have the total
If payroll needs a decimal, convert the final total after adding. 5:05 becomes 5.08 decimal hours because 5 minutes ÷ 60 = 0.08. Do not add 1.45 + 2.30 + 0.50 as decimals; those numbers mean something different. The Decimal Hours Calculator converts the final total.
Adding work tasks vs adding shifts
For task logs, a time adder is enough. For shifts with clock-in and clock-out times, use the Hours Calculator for one shift or the Time Card Calculator for a full week. Those tools account for overnight shifts and unpaid breaks before the totals are added.
When overtime matters
Once the weekly total passes 40 hours under federal rules, overtime may apply. After adding the week, send the number to the Overtime Pay Calculator or check overtime hours with the Overtime Hours Calculator.
Frequently asked questions
Add hours to hours and minutes to minutes, then carry every 60 minutes into 1 hour. 1:45 + 2:30 + 0:50 = 5:05.
5.08 hours. Divide 5 minutes by 60 to get 0.08, then add it to the 5 whole hours.
Only if the values are already decimal hours. Do not treat 1:45 as 1.45; 1 hour 45 minutes is 1.75 decimal hours.
A time adder totals hours. Use the Overtime Pay Calculator or Overtime Hours Calculator after you know the weekly total.