How Many Football Fields Would the Monarchs Cover? This year’s monarch population is estimated to cover 6.67 hectares. How many football fields would all of this year’s butterfly trees cover? Try the math yourself! We've provided an example below if you need some help. Example In 2005/2006 the estimate was 5.9 hectares. Dakota, Amanda, Jasmine, Leanna, Travis, and Dalton of Mrs. Busher’s class shared their calculations. They said the monarchs would cover 14.57 football fields. "Rounded off, this would be 15 football fields," they said. Great job! Here is our rough calculation: 1 football field is roughly 1 acre* 2.417 acres in 1 hectare 2.417 football fields in 1 hectare 5.9 hectares of monarch trees this year 5.9 X 2.417 = 14.206 football fields of monarch trees this year 1 acre per football field 2.417 acres per hectare 2.417 football fields per hectare 2.417 x 5.9 hectares = 14.206 football fields * The exact measurements of football fields vary.   This Season Teachers Kids Orientation Registration Search Copyright 1997-2008 Journey North. All Rights Reserved. Questions or comments? Contact us.