Id businessHoursId = [select Id from BusinessHours where isdefault = true ].id;
DateTime dateTime1 = Datetime.valueOf('2015-07-10 12:00:00');
DateTime dateTime2 = Datetime.valueOf('2015-07-13 12:00:00');
Long hours = Math.abs(BusinessHours.diff(businessHoursId,dateTime1,dateTime2)/1000/60/60);
Decimal days = hours / 24.0;

Above code gives 72 hours, but it should be 27 working hours. How can I modify this code to work as expected?

  • 5
    Are you sure you adjusted the days and hours for the associated default business hours so they do not say "24 hours" next to each day?
    – Eric
    May 8, 2017 at 18:02
  • Eric, i dint understand how to adjust default business hours. I am new to sfdc dev. Is it possible for you to advice. May 8, 2017 at 18:14

1 Answer 1


You most likely (from your comment) have not set up the business hours so they are all set to the default of 24 Hours a day 7 days a week.

A quick google search for "Salesforce set up business hours" yielded this gem:


To set business hours:

  1. From Setup, enter Business Hours in the Quick Find box, then select Business Hours.
  2. Click New Business Hours.
  3. Type a name for the business hours.
  4. We recommend using a name that will remind users of a location or time zone when they view business hours on a case, entitlement process, or milestone. For example, if your business hours are for a support center in San Francisco, you could use the name San Francisco Business Hours.
  5. Click Active to allow users to associate the business hours with cases, escalation rules, milestones, and entitlement processes. Optionally, click Use these business hours as the default to set the business hours as the default business hours on all new cases. Default business hours on cases can be updated with business hours on escalation rules if the cases match escalation rule criteria and the rule is set to override business hours.
  6. Choose a time zone to associate with the business hours in the Time Zone drop-down list.
  7. Set your business hours for each day of the week.
    • If your support team is available during the entire day every day of the week, select the 24 hours checkbox.
    • Choose the start and end times for the business hours. If the time you want isn’t available, click the field and type it in.
    • Leave the business hours start and end times blank and the 24 hours checkbox deselected to indicate that the support team is not available at all that day.
  8. Click Save.
  • thanks Eric. i updated business hours and using below code May 9, 2017 at 2:18
  • public Long diff(Id businessHoursId, Datetime startDate, Datetime endDate) { DateTime dateTime1 = Datetime.valueOf('startDate'); DateTime dateTime2 = Datetime.valueOf('endDate'); Long hours = Math.abs(BusinessHours.diff(businessHoursId,dateTime1,dateTime2)/1000/60/60); Decimal days = hours / 24.0; system.debug('decimal days'+ hours ); } May 9, 2017 at 2:18
  • Id businessHoursId = [select Id from BusinessHours where isdefault = true ].id; ResponseTimeCal(businessHoursId,oppObj.createdDate,oppObj.Response_Date__c); i am geting error, incorrect signature. but i dont c any error in the syntax May 9, 2017 at 2:19

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .