How big is a gas cooktop?#
A gas cooktop is 30, 36, or 45 inches wide overall, dropping into a cutout of 28.5 to 29.5, 34.5 to 35.5, or 43 to 44 inches respectively, all at a 20-to-21-inch depth. The table below matches each width to its cutout, and the clearances cover the depth and side room a gas surface needs.
Gas cooktop dimensions by configuration#
| Configuration | Overall width (in) | Cutout width (in) | Depth (in) | Best for |
|---|---|---|---|---|
| 30-inch sealed-burner gas cooktop | 30 | 28.5–29.5 | 20–21 | four sealed burners in the common width |
| 36-inch five-burner gas cooktop | 36 | 34.5–35.5 | 20–21 | a center power burner and big cookware |
| 45-inch six-burner gas cooktop | 45 | 43–44 | 20–21 | a pro-style wide gas layout |
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Installation clearances for a gas cooktop#
- Cutout depth: 19–21 in in of countertop cutout depth a gas cooktop needs behind the front edge.
- Below-counter clearance: 3–5 in in the gas cooktop burner box drops below the countertop, so leave that above a drawer or oven.
- Combustible side clearance: 6–12 in in a gas cooktop wants from an edge burner to a combustible side wall.
- Gas and igniter power: A gas cooktop needs the gas shutoff and a standard outlet for the spark igniters within reach under the counter.
Will your gas cooktop fit? Clearances and door swing#
A gas cooktop drops into a countertop cutout, so match the cutout width to your model and give it 19 to 21 inches of cutout depth behind the front edge. Below the counter, the burner box hangs down 3 to 5 inches, so whatever sits beneath — a drawer, a wall oven, a cabinet shelf — has to leave that much room. The clearance that matters for safety is to the sides: a gas cooktop wants 6 to 12 inches from an edge burner to any combustible side wall, more than an electric surface, because open flame throws heat outward. Two utilities have to reach under the counter: the gas shutoff and connector, and a standard outlet for the spark igniters. Confirm the below-counter depth, the side-wall gap, and both hookups before you commit to the cutout.
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Gas cooktop sizes by type: 30-inch sealed-burner gas cooktop, 36-inch five-burner gas cooktop, 45-inch six-burner gas cooktop#
The 30-inch sealed-burner gas cooktop is the common width, fitting four sealed burners into a 28.5-to-29.5-inch cutout — the right size for most kitchens. The 36-inch five-burner steps up to a 34.5-to-35.5-inch cutout and usually adds a center power burner, so big cookware and a stockpot both have a home. The 45-inch six-burner is the pro-style wide layout, taking a 43-to-44-inch cutout for serious cooking real estate. All three hold the same 20-to-21-inch depth and the same below-counter and side-wall clearances, so the choice is simply how much cooking width your counter and family need. Go 30-inch for a standard kitchen, 36-inch for a center power burner, and 45-inch when you cook on many burners at once.
Appliance Repair Technician · 8 years experience
Experienced technician with 8 years specializing in dishwasher repairs and European appliance brands including Bosch and Thermador.
