Appliance Openings

GE JP3030DJBB cutout dimensions (30-inch electric cooktop)

GE's installation instructions 31-2001182 give one countertop cutout for its 30-inch electric cooktops: 28 1/2 to 28 5/8 in for the length of cut and 19 5/8 to 19 3/4 in for the width of cut.

Verify with the maker's installation instructions before you cut or buy. This page lists fit dimensions only. It is not installation guidance.

28 1/2"–28 5/8" x 19 5/8"–19 3/4"
Countertop cutout for 30-inch models (length of cut x width of cut).
Source: GE installation instructions 31-2001182 Rev. 0 (PDF) (accessed 2026-10-27), page 4, “Cutout dimensions of the countertop”. Last checked 2026-10-27.

Cooktop size, JP3030DJBB and JP3030DJWW

DimensionGE figure
X (width)29 3/4"
Y (depth)20 7/8"
Z front3 1/4"
Z rear (GE: “depth at rear of cooktop at conduit location”)4"

Source: GE 31-2001182 (PDF), page 4, “Approximate cooktop dimensions” table. GE marks these as approximate.

A note on the JP3030DWBB

GE's support page for the older JP3030DWBB links to these same instructions, but the model table in them lists JP3030DJBB, JP3030DJWW and JP3030SJSS, not the DWBB. GE's product page lists the JP3030DWBB at 4 H x 29.75 W x 20.875 D and says it is no longer manufactured. Until a GE document names the DWBB, treat its cutout as unconfirmed.

Sources: GE JP3030DWBB install support page (accessed 2026-10-27); GE JP3030DWBB product page (accessed 2026-10-27).

Larger existing openings

GE's instructions list a JXTR32 cutout filler trim kit for 30-inch models, for countertop cutouts larger than shown, up to 29-13/16" x 20-7/16". The part numbers are JXTR32B (black) and JXTR32W (white).

What this page leaves out

The maker's document also covers electrical, gas, venting, support and clearance requirements. We do not repeat any of that here. Read those sections in the maker's installation instructions.

No affiliate links are live on this site. If we add any, we will mark them and explain them on our disclosure page. Links never change a dimension.

Sources

  1. GE Appliances, installation instructions 31-2001182 Rev. 0 (PDF): https://images.salsify.com/image/upload/s--EoskCla4--/6037f1f756e66ad62fdcf5e3fa0bff9dff097449.pdf, accessed 2026-10-27
  2. GE Appliances, JP3030DWBB install support page: https://products.geappliances.com/appliance/gea-specs/JP3030DWBB/install, accessed 2026-10-27
  3. GE Appliances, JP3030DWBB product page: https://www.geappliances.com/appliance/GE-30-Built-In-Knob-Control-Electric-Cooktop-JP3030DWBB, accessed 2026-10-27

Last checked 2026-10-27.