11.8 - COMPUTER
  Number of households by size of household
Two members Three members Four or more members Not stated
Households with a personal computer (including laptop)
Yes 3,908,988 A 2,020,621 A 3,040,614 A 674,773 A
No 428,360 A 44,743 M U 120,432 M
Not stated U U U U
Number of personal computers
One 1,846,851 A 757,196 A 741,125 A 271,405 M
Two 1,341,264 A 652,667 A 1,035,036 A 241,446 M
Three or more 450,967 A 545,139 A 1,141,873 A U
Don't know U U U
Not stated 350,725 A 70,055 M U U
Type of personal computer most frequently used
Desktop 1,968,086 A 972,231 A 1,405,450 A 340,429 M
Laptop 1,741,003 A 946,208 A 1,470,706 A 312,349 M
Don't know U U U
Not stated 263,109 M 106,702 M 168,910 M U
Age of the most frequently used personal computer
5 years or less 2,813,007 A 1,575,242 A 2,419,593 A 484,254 M
6 to 10 years 675,695 A 315,403 A 344,308 A U
11 years or more 83,382 M U U U
Don't know U U U U
Not stated 401,816 A 114,567 M 263,859 M U
Households with an ENERGY STAR® qualified personal computer (most frequently used personal computer)
Yes 1,625,735 A 903,066 A 1,314,028 A 280,888 M
No 638,082 A 258,700 A 349,152 A U
Don't know 1,096,017 A 697,777 A 1,157,053 A 209,329 M
Not stated 632,449 A 167,881 M 225,900 M U
Time the most frequently used personal computer is ON in a typical week
10 hours or less 1,321,993 A 470,474 A 678,665 A 240,869 M
11 to 20 hours 720,912 A 355,849 A 583,056 M U
21 to 40 hours 646,862 A 384,363 A 676,299 A U
41 hours or more 781,279 A 548,172 A 685,479 A U
Don't know 394,162 A 231,026 A 384,547 A U
Not stated 127,075 M U U U
Time the most frequently used personal computer is IN USE in a typical week
10 hours or less 1,571,682 A 619,782 A 941,298 A 243,164 M
11 to 20 hours 1,001,675 A 462,829 A 770,865 A 186,277 M
21 to 40 hours 743,322 A 468,680 A 718,749 A U
41 hours or more 231,753 A 189,864 M 202,968 M U
Don't know 377,214 A 262,507 A 395,869 A U
Not stated 66,636 M U U U

Note:

Due to rounding, the numbers may not add up and may differ slightly among tables.

Legend:

The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.

Source:

2011 Survey of Household Energy Use