This post published by "Hello techo" shows how to create a Gantt Chart with Google sheets inserting charts based on calculating the number of days for specified tasks. Will require knowledge of using formulas in Google sheets.
http://www.hellotecho.com/how-to-crea...simple-gantt-chart-with-google-sheets
Voting 1
Illustration of how to create a simple Gantt chart using tables in a word processor without using sophisticated project management software. Ideal for students taking IPM103.
http://www.lindsay-sherwin.co.uk/proj...lanning_a_project/12b_ganntinword.htm
Voting 1