So you are building a city...
 
Common Land Measurements & Output
1 Virgate = 30 Acres (feeds 5-7),
4 Virgates = 1 Hide =120 Acres (feeds 25-30)
5.25 Hides = 1 Square Mile (feeds 125 people)

Typical Medieval Village Stats
250 People, 75 Households, 100 Buildings, 2 Square Miles
or – 10.5 Hides of land, or 42 Virgates

Standard Village Demographics(for a village of 250 people)
1 gentry family holding a hide (120 acres) of land (5 people)
10 Virgaters holding a virgate (30-40 acers ) of land (50 people)
14 Half Virgaters holding a half virgate (15-20 acres) of land (70 people)
5 Quarter Virgaters holding a quarter virgate (8-12 acres) of land (25 people)
20 Smallholders with less than 5acres of land (100 people)

Community Size Population Density (adults/ acre) Average Number of Structures (per acre) Small Town 30-40 15-20 Large Town 40-60 20-30 Small City 80-120 40-60 Large City 125-145 50-70 Metropolis 150-200 60-80