To Measure Section A:

Take the wall dimension of Section A & minus the depth of Section B

125½" - 25½ " = 100"

Take this number & multiply by the depth of Section A

100" x 25" = 2500 sq. in.

Divide this number by 144

2500 ÷ 144 = 17.36 sq. ft.

To Measure Section B:

Take the wall dimension of Section B & multiply by the depth of Section B

60" x 25½ " = 1530 sq. in.

Divide this number by 144

1530 ÷ 144 = 10.63 sq ft.

Add the total of Section A & Section B & round to the nearest ¼ sq. ft.
17.36 + 10.83 = 27.99 sq. ft. / The total counter top is 28 sq. ft.

You can download a form package that includes graph paper for measuring your countertops here. 

Click on the type of countertop you wish to measure for specific directions on measuring it correctly.

Rectangular	Angled Island	L Shaped	Backsplash