How to Make a Template for a Counter

Measure your counter's dimensions, including all irregular corners and shapes. Calculate the total area of the countertop by multiplying the length and width of each section.

Cut a large panel of foam board, thin plywood or thick cardboard large enough to cover the surface area of the counter using a handsaw or utility knife, depending on the material you choose. Cut additional strips about 3 to 4 inches wide for the front overhang and to mark the back wall. For counters with irregular shape, cutting a large panel, then tracing and trimming as you lay them on the counter, may work better than cutting long, straight strips.

Line up one of the strips against the back wall on the current countertop, or atop the cabinets if there's no countertop at all. Trim the strip as necessary to fit flat and tight against the wall, which may be uneven. Secure the strip with painter's tape.

Cut an overhang strip as wide as you want your actual countertop to extend out from the cabinet structure. Place the strip extended out from the front of the cabinet. Secure it with tape.

Place the large panel atop the counter. Check that the edges are flush with the cabinet edges. Mark and trim as needed for irregular counter shapes. Adjust it for a snug fit between the front overhang and back panel. Tape in place when you achieve the proper fit.

Mark the sink template onto the cardboard per manufacturer instructions. Also mark any joints, fixtures or irregular features using a marker.

Send the template to your installer or use it when cutting countertop material.