Reference > Functions reference > Aggregate functions > Sum
Returns the total of all valid, non-blank values in a field.
field - any related field, repeating field, or set of non-repeating fields; or an expression that returns a field, repeating field, or set of non-repeating fields.
Parameters in braces { } are optional.
Data type returned 
Originated in 
FileMaker Pro 6.0 or earlier
Field can be any of the following:
a repeating field (repeatingField).
a field in matching related records specified by (table::field), whether or not these records appear in a portal.
several non-repeating fields in a record (field1;field2;field3...).
corresponding repetitions of repeating fields in a record (repeatingField1;repeatingField2;repeatingField3), if the result is returned in a repeating field with at least the same number of repeats.
several fields in the first matching record specified by (table::field1;table::field2;...). You can include fields from different tables (table 1::field A;table 2::field B...).
When a referenced field is a repeating field, the Sum function returns the sum of the first repetition field, then the sum of the second repetition field, and so on.
An Invoice table has a portal showing line items.
Sum(LineItems::ExtendedPrice) totals the amounts for all items on the invoice.
A TimeBilling table has a portal showing time worked on a project. Hours is a time field.
Sum(Hours::BillableHours) returns the total number of billable hours on a project. Thus, if the portal shows 40 hours and 15:30 hours, the total billable hours are 55:30, or 55 1/2 hours.
In the following examples:
Field1 contains two repetitions with values of 1 and 2.
Field2 contains four repetitions with values of 5, 6, 7, and 8.
Field3 contains 6.
If the calculation result isn’t a repeating field:
Sum(Field2) returns 26.
Sum(Field1;Field2;Field3) returns 12.
If the calculation result is a repeating field:
Sum(Field2) returns a repeating field with 26 in the first repetition.
Sum(Field1;Field2;Field3) returns a repeating field with 12, 8, 7, 8.
Related topics 
Functions reference (category list)
Functions reference (alphabetical list)
About formulas
About functions
Defining calculation fields
Using operators in formulas