The LSSL Survey Level Book Spreadsheet enables the quick calculation of a levelling run. All you need to do is enter your staff readings.
Taking a reading on an E-Grad staff precisely and accurately is only the first part of completing a successful levelling run or traverse. It is important that your E-Grad staff readings are noted down accurately and in the correct format in a field book. This will enable you, and anyone else, to check your levelling work.
This survey level book spreadsheet works on the height of collimation booking method. If you want a detailed description of how this is done then you can find it at https://www.lssltd.net/methods-for-booking-a-levelling-run-the-height-of-collimation-method