If you are not comfortable measuring, you can call a custom cabinet company. They will measure and install for you!
If you are replacing what you have with no changes:
- Make a bird's-eye-view sketch on a piece of paper of your existing countertop layout. Measure from one end to the other. If it is a corner, measure from the wall to the edge of the counter. Write your measurement down behind that piece of countertop.
- For your sink cutout, measure from the center of your sink to the edge of you counter. Place a mark on you paper as shown below with the arrow pointing in the direction that you measured. If you have a standard size double sink, put that information on there. If you have a farm sink or single basin or triple basin sink, include that information along with the width and length of the sink.
- Any countertop edges that are in view, write cap. You need to cap countertops that butt up against your fridge, stove, and that are in view. You can leave edges raw if they are butting up against a wall.
- Determine whether you want a backsplash or not. A standard countertop backsplash is 4". If you have a tile backwall, and you aren't changing it, you will need to replace your countertop with what you have.
- If your countertops are butting up against a refrigerator end panel, a pantry, or oven cabinet, approximately 1" of your countertop will stick out. You will either need a 1" cap on the rolled edge or the entire end capped.
- Draw a bird's eye view of your cabinet layout on a piece of paper.
- Measure from one end of your cabinet run to the other.
- Add 1" for an overhang on the end of the cabinet run
- Add 1/8" for an overhang butting against a range.
- Add 1/4" for an overhang next to a refrigerator (that doesn't have a panel).
- Add 1" for overhang in front (this measurement should be 25".
- Add 12" if you are extending your countertop for seating.
- For a raised bar, add 1 1/2" in front of your wall or panel and 12" behind (should be 15" or 18")
- For you sink cutout, determine the center of your sink cabinet. Place a pencil mark. Measure from one side of your cabinet run to your pencil mark. Add additional length for any overhang. Make a center mark with an arrow pointing in the direction that you measured (see above).
1" overhang on exposed ends
Countertop butting up against refrigerator, pantry, oven cabinet or other tall cabinets needs 1" cap.
Add extra on width and depth for legs. (This is a 3" leg so I added 1 1/2" + the additional 1" overhang. So the depth of this counter (with the 12" overhang in the back is 12+24 (cabinet depth) + 1 1/2" (quartered leg) + 1" for front overhang = 38 1/2".
1/8" overhang against a range.