Totals

The bottom line totals the columns.

Calculations

Calculated fields start with =. Use any JavaScript operators like = PI / 2

References

Refer to any other cell with its column and row like =A3 Specify a rectangular range with syntax like =max(A3:B3) Two ranges can be separated by a comma.

&

Use & to add words. i.e. =A3 & " hours"

Example JavaScript Math functions

Example Math constants

All the functions and constants from the browser's Math library are available. See MDN doc

Errors

If you see #Error in a field it means there was something wrong with the calculation. You can hover over the field to see an error message. Also use the Developer's Tools (F12) to see the error in the console log.