Onlyfire 18"x12.5" Stainless Steel Griddle Review (2026): A Spec-Based Look
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This onlyfire 18 12 5 universal stainless steel review covers a flat top griddle insert designed for outdoor gas grills. It offers over 200 square inches of cooking surface, measuring 18 inches wide by 12.5 inches deep. The unit stands 2.7 inches high and weighs 8.71 pounds. Its stainless steel construction provides a durable, silver-colored surface. This insert transforms standard grill grates into a unified cooking zone, allowing you to prepare a variety of foods simultaneously. The design focuses on maximizing usable space within your existing grill framework.
What stands out
- Dimensions of 18" x 12.5" x 2.7" provide over 200 sq. in. of cooking area.
- Stainless steel surface ensures durability and stick-free cooking capabilities.
- Welded cross bracing promotes stability and even heat distribution across the flat top.
- Integrated grease trough collects drippings to prevent flare-ups and simplify cleanup.
Who it fits
Good fit for
You should consider this insert if you own a gas grill that accepts standard-sized accessories. The 18 by 12.5 inch footprint fits most common grill models, giving you extra room for breakfast items or delicate foods. The low 2.7-inch profile keeps the center of gravity low for stability. If you prefer easy cleanup and want to avoid flare-ups from direct flame contact, the grease trough and stainless steel surface are practical choices for your outdoor cooking setup.
Who should skip it
Skip this option if your grill has non-standard grate spacing or dimensions that do not match the 18 by 12.5 inch size. The product is a flat insert, so it lacks side walls for deep frying or high-heat searing zones. It also does not include temperature controls or burners, relying entirely on your grill’s existing heat source. If you need a portable, standalone unit with its own fuel system, this insert will not meet your requirements.
Verdict: This griddle insert is a solid, spec-driven solution for expanding your grill’s cooking surface. It offers reliable stainless steel construction and practical features like a grease trough for everyday outdoor meals.
Key specs explained
Cooking Dimensions: 18" x 12.5"
These measurements define the flat cooking area. You get 18 inches of width and 12.5 inches of depth. This layout fits standard gas grill grates. It allows you to cook multiple items at once. Compare this size to larger 23-inch inserts if you need more space. This size suits small families or compact grills.
Cooking Area: over 200 sq. in.
The total surface area exceeds 200 square inches. This provides ample room for pancakes, eggs, or vegetables. You can cook a full breakfast without crowding. This metric helps you compare capacity against other griddles. A larger area means faster meal prep for groups. This spec ensures you have enough room for typical outdoor meals.
Surface Material: Stainless Steel
The cooking surface is made of stainless steel. This material is durable and resists rust. It provides a non-stick finish for easier food release. You can use metal utensils without damaging the surface. Stainless steel is easier to clean than cast iron. It maintains heat well for consistent searing. This material choice supports long-term outdoor use.
Height: 2.75 inches
The sidewalls stand 2.75 inches high. This height contains grease and prevents food from sliding off. You can flip burgers and pancakes safely. The walls also help retain heat for even cooking. Compare this to lower profiles if you prefer open grilling. This depth makes it suitable for sautéing and stir-frying. It keeps your grill top cleaner during use.
Design and Build Quality
The listing describes this unit as a stainless steel griddle insert. The material is silver in color and weighs 8.71 pounds. This weight suggests it is sturdy enough to stay in place on your grill grates without shifting during cooking. The dimensions are 18 inches wide by 12.5 inches deep. It stands 2.7 inches high. These measurements provide over 200 square inches of cooking surface. You can use this space to cook multiple items simultaneously.
The design includes raised sidewalls. According to the listing, these walls help keep food on the griddle. They also make it easier for you to flip and turn items without them sliding off the edge. The surface is non-stick stainless steel. This finish is intended to provide stick-free cooking. It also simplifies cleaning after you finish your meal. You can wipe it down without worrying about food sticking to the metal.
Structural stability comes from welded cross bracing. This feature is designed to ensure even heat distribution. The listing notes that the griddle comes with two removable handles. A wrench is included to tighten them. This setup allows you to move the griddle safely when it is hot. A grease trough collects drippings. This component helps prevent flare-ups and keeps your grill cleaner. The overall build focuses on practical outdoor cooking needs.
Setup and Everyday Use Guide
This griddle insert is designed to fit virtually any gas grill. You place the 18-inch by 12.5-inch stainless steel plate directly over your existing grill grates. The unit includes two removable handles and one wrench. You use the wrench to tighten the handles to the griddle body. This setup process is straightforward and does not require complex assembly. The welded cross bracing provides stability, ensuring the plate remains level during cooking. This structural detail helps distribute heat evenly across the surface. The 2.7-inch height allows for adequate space beneath the cooking surface. This height accommodates standard heat sources without restricting airflow or causing instability. The stainless steel surface is non-stick, which simplifies daily cooking tasks. You can flip and turn food easily because the sidewalls keep ingredients contained. These walls are ideal for preventing food from sliding off the edge. A grease trough is integrated into the design to collect drippings. This feature helps prevent flare-ups, which can occur when fat hits open flames. It also makes cleanup easier by channeling waste away from your heat source. You can remove the handles to store the griddle flat or use them for transport. The silver finish resists corrosion, though regular cleaning is recommended. The over 200-square-inch cooking area allows you to prepare multiple items simultaneously. This capacity suits family meals or gatherings. The compatible appliance is listed as a general griddle, but the dimensions suggest it works best with standard gas grills. You should verify your grill grate spacing before purchase. The insert weighs 8.71 pounds, which is manageable for most users. This weight keeps the unit secure on the grill without being difficult to lift.
Before You Buy This Griddle
This insert expands your grill’s capacity significantly. You gain over 200 square inches of flat cooking space. Before purchasing, verify your grill’s internal dimensions. The 18 by 12.5 inch footprint fits many standard models, but you must measure your grate area first. The 2.7 inch sidewalls help contain food, yet you may need long-handled spatulas to navigate the surface comfortably. Keep in mind that stainless steel requires regular seasoning to maintain its non-stick properties. Unlike dedicated pizza ovens or heavy cast iron griddles, this unit is lightweight at 8.71 pounds. It sits directly on existing grates, so it does not require a separate stand. Consider how this fits into your current outdoor cooking routine. If you frequently cook breakfast items or large batches of vegetables, this insert adds versatility. However, if you primarily sear steaks on high heat, a thicker cast iron plate might retain heat better. This option suits those who want flexible, easy-to-store cooking space without permanent installation.
Check before you buy
- Measure your grill’s internal grate width and depth.
- Confirm the 18 by 12.5 inch size fits your model.
- Check if your grill has side burners that block placement.
- Ensure you have long-handled tools for the 2.7 inch walls.
The product at a glance
Onlyfire 18"x12.5" Stainless Steel Griddle Insert
Best for: expanding gas grill cooking space
- Cooking Area
- Over 200 sq. in.
- Surface Material
- Stainless Steel
- Fuel Type
- Gas, Charcoal
- Application
- Camping, Tailgating
- Compatible Appliance
- Griddle
- Dimensions
- 18 × 12.5 × 2.75 inches
View on Amazon: Onlyfire 18"x12.5" Stainless Steel Griddle Insert Affiliate link
This Onlyfire griddle insert adds over 200 square inches of cooking space to your gas grill. Measuring 18 inches by 12.5 inches with 2.7-inch sidewalls, it fits most standard grills. The stainless steel surface offers a non-stick finish for easy cleaning. Weighing 8.71 pounds, it includes removable handles for safe transport. The welded cross bracing helps distribute heat evenly across the flat top.
Pros
- Provides over 200 square inches of cooking surface
- Stainless steel construction with non-stick finish
- 2.7-inch high sidewalls prevent food from sliding off
- Includes grease trough to catch drippings
- Welded cross bracing for stability and even heat
Cons
- Smaller cooking area than larger 23-inch or 25-inch variants
- Fixed height limits compatibility with very deep grill bowls
- No built-in temperature control or thermometer included
Good fit if
- You want to expand your grill's cooking capacity
- You prefer easy cleanup with a non-stick surface
- You need a universal fit for standard gas grills
Skip if
- You require precise temperature monitoring
- You need a surface larger than 200 square inches
- Your grill has unusually deep or narrow sides
Verdict: Onlyfire 18x12.5 Stainless Steel Griddle is a solid choice for grillers needing extra space for breakfast or vegetables. It fits well if you prioritize simple, durable stainless steel construction over advanced features.
Specifications side by side
| Spec | Onlyfire 18"x12.5" Stainless Steel Griddle Insert |
|---|---|
| Cooking Area | Over 200 sq. in. |
| Surface Material | Stainless Steel |
| Fuel Type | Gas, Charcoal |
| Application | Camping, Tailgating |
| Material | Stainless Steel |
| Compatible Appliance | Griddle |
| Dimensions | 18 × 12.5 × 2.75 inches |
| Weight | 8.71 pounds |
| Size | 18" x 12.5" x 2.7" |
| Color | Silver |
| Model | FBA_F1-BGG8201-SS |
Frequently asked questions
Is the Onlyfire 18x12.5 griddle compatible with my gas grill?
Yes, this insert is designed to fit virtually any standard gas grill. You simply place the 18-inch by 12.5-inch stainless steel plate directly over your existing grill grates. The dimensions allow it to expand your cooking area significantly without requiring complex installation. Always verify your grill's internal width and depth to ensure a proper fit before use.
What is the total cooking surface area of this griddle?
The griddle provides over 200 square inches of flat cooking space. This generous area is defined by its 18-inch width and 12.5-inch depth. This layout allows you to cook multiple items simultaneously, such as breakfast foods or vegetables, making it ideal for families or outdoor gatherings where space is at a premium.
How heavy is the Onlyfire stainless steel griddle insert?
The unit weighs 8.71 pounds. This substantial weight helps the griddle stay securely in place on your grill grates during cooking. It reduces the likelihood of shifting or sliding when you are flipping heavy foods. The stainless steel construction contributes to this durability and stability.
Does the griddle come with handles for easy lifting?
Yes, the listing includes two removable handles and one wrench. You use the wrench to attach the handles to the griddle body. These handles allow you to safely lift and position the heavy stainless steel plate onto your grill grates. They make setup and removal much easier than trying to grip the hot metal directly.
What material is used to construct this griddle insert?
It is made from stainless steel with a silver finish. This material choice offers durability and resistance to corrosion during outdoor cooking. The stainless steel surface provides a smooth, flat top for even heat distribution. It is a practical choice for those who prioritize simple, long-lasting construction over complex features.
What are the exact dimensions of the Onlyfire griddle?
The dimensions are 18 inches in length, 12.5 inches in width, and 2.7 inches in height. The 2.75-inch height includes the rim and handle attachment points. These specific measurements ensure it fits over standard grill grates while providing ample space for cooking various types of food simultaneously.
Who is the best target audience for this griddle?
This griddle is best for grillers who need extra space for breakfast or vegetables. It is ideal for those who prioritize simple, durable stainless steel construction over advanced features. If you want to expand your gas grill cooking capacity without buying a separate appliance, this insert is a solid choice for your outdoor kitchen.