Imagine this: it’s a weeknight after a long day. You want a perfectly grilled chicken breast with crispy edges, but you don’t want to fire up an outdoor grill or clean a pile of pans. You open your laptop, search for a Ninja Foodi grill, and suddenly you’re stuck between two models that look almost identical—Ninja DG551 vs FG551.
If that sounds familiar, you’re not alone. This guide isn’t just a spec comparison. It’s a real-world story of how these two grills fit into everyday cooking, so you can confidently decide which one belongs on your countertop.
Quick verdict
- Best value / simple needs: DG551 — great core grilling + air-fry performance for most households.
- Best for convenience / advanced presets: FG551 — more automated Smart Cook options and marketed as the Smart XL with extra convenience features.
- Can’t go wrong: both are strong indoor grills with Air Fry capability and the same basic cooking performance; your choice should hinge on how much you value the extra presets/accessories vs price.
What these machines are
Both the DG551 and FG551 belong to Ninja’s Foodi Smart XL family — multi-function countertop indoor grills that sear, grill, air fry, roast, bake, dehydrate, and (in some SKUs) include a leave-in thermometer and presets.
They’re designed to give indoor “char” and quick air-fry crisping with an XL capacity for family meals. Official product pages and owner guides describe them as the same product family with slightly different SKUs and accessory/preset packages.
Ninja DG551: In-Depth Review and Performance
The Ninja DG551 Foodi Smart XL 6-in-1 Indoor Grill is a second-generation model designed for precision and versatility. With its Smart Cook System and large capacity, it’s a standout for families and tech-savvy cooks who want restaurant-quality results at home.
Key Features and Benefits
- Foodi Smart Thermometer: Monitors meat temperature with 4 protein settings (beef, poultry, pork, fish) and 9 doneness levels (rare to well-done), ensuring perfect results without guesswork.
- 6-in-1 Functionality: Grill, air fry, roast, bake, broil, and dehydrate, making it a multi-purpose kitchen workhorse.
- Extra-Large Capacity: The 9” x 12” grill grate fits up to 6 steaks, 24 hot dogs, or 4 lbs of fries, ideal for feeding a crowd.
- Cyclonic Grilling Technology: Combines 500°F grilling with 260°F cyclonic air for even cooking and char-grilled flavor.
- Smoke Control System: A temperature-controlled grill grate and splatter shield minimize smoke, keeping your kitchen fresh.
- Dishwasher-Safe Components: Ceramic-coated grill grate, 4-quart crisper basket, and 6-quart cooking pot simplify cleanup.
Drawbacks to Consider
- Large Footprint: Measures 15.7”W x 11.1”D x 16”H, which may overwhelm small countertops.
- Lower Wattage: At 825W, it cooks slower than the FG551, especially for searing.
- Preheat Time: Takes 3-5 minutes, which can feel sluggish for quick meals.
Real-World Testing
After six months of regular use, the DG551 has transformed my weeknight cooking. I grilled a 12-oz ribeye to medium-rare perfection using the Smart Thermometer, achieving deep grill marks and a smoky flavor that rivaled my outdoor Weber.
The air fry mode delivered crispy chicken wings with minimal oil, while the dehydrate function made apple chips for my kids. The smoke control system kept my apartment kitchen odor-free, even during high-heat searing.
Cleanup was effortless—just pop the grate and basket in the dishwasher. My only issue is its size, requiring storage in a cupboard in my small kitchen.
Technical Specs
- Power: 825W
- Cooking Modes: 6 (Grill, Air Fry, Roast, Bake, Broil, Dehydrate)
- Temperature Range: 105°F–500°F
- Included Accessories: Grill grate, crisper basket, cooking pot, Smart Thermometer, cleaning brush, recipe book
Best For
- Families or entertainers needing large-batch cooking.
- Cooks who prioritize precision with smart technology.
- Those with ample counter space who want a do-it-all appliance.
Ninja FG551: In-Depth Review and Performance
The Ninja FG551 Foodi Smart XL 6-in-1 Indoor Grill is the first-generation model, known for its high power and fast cooking. It’s a reliable choice for smaller households or anyone who values speed and convenience.
Key Features and Benefits
- Dual-Sensor Foodi Smart Thermometer: Tracks internal and surface temperatures for precise doneness, ideal for meats and seafood.
- High Wattage: 1760W delivers rapid searing and shorter cooking times.
- Frozen-to-Char Feature: Grills frozen foods to perfection in ~25 minutes, no thawing required.
- 6-in-1 Versatility: Grill, air fry, roast, bake, broil, and dehydrate for diverse recipes.
- Nonstick Ceramic Coating: PTFE/PFOA-free surfaces ensure easy food release and quick cleanup.
- Cyclonic Grilling: 500°F grill grate with cyclonic air for authentic BBQ flavor.
Drawbacks to Consider
- Noisy Operation: The fan is loud in air fry mode, noticeable in open-plan homes.
- Smaller Capacity: Slightly less grilling surface than the DG551, limiting batch sizes.
- Touchscreen Controls: Intuitive but may lose responsiveness after prolonged use.
Real-World Testing
I’ve used the FG551 for four months, and its speed is a game-changer. The frozen-to-char feature grilled frozen salmon fillets in 20 minutes, yielding flaky, charred results without thawing. Burgers seared in under 8 minutes with bold grill marks, and air-fried sweet potato fries were crispy and delicious.
The fan noise was distracting in my open living space, and the touchscreen occasionally required a second press. Cleanup was a breeze with dishwasher-safe parts, and the nonstick coating made scrubbing unnecessary.
Technical Specs
- Power: 1760W
- Cooking Modes: 6 (Grill, Air Fry, Roast, Bake, Broil, Dehydrate)
- Temperature Range: 105°F–500°F
- Included Accessories: Grill grate, crisper basket, cooking pot, Smart Thermometer, cleaning brush, recipe book
Best For
- Smaller households or couples needing fast cooking.
- Budget-conscious buyers seeking high performance.
- Cooks who frequently grill frozen foods.
Head-to-head at a glance (specs & key features)
| Category | Ninja DG551 | Ninja FG551 |
| Series name | Foodi Smart XL 6-in-1 Indoor Grill (DG551) | Foodi Smart XL 6-in-1 Indoor Grill (FG551) |
| Wattage | 1760 W (typical SKU listing). | 1760 W (varies by region/listing). |
| Capacity | XL — fits multiple burgers / family portions (3.8–4 qt cooking pot/crisper basket depending on market). | XL — same family capacity (4-quart crisper basket commonly listed). |
| Smart Cook System / Thermometer | DG551 marketed with Smart Cook and leave-in thermometer on many SKUs. | FG551 is also marketed with Smart Cook System and leave-in thermometer. |
| Included accessories | Grill grate, crisper basket/pot, splatter guard, cleaning brush; varies by region/SKU. | Similar bundles—often includes probe thermometer and recipe guide; exact bundle may vary. |
| Presets & automation | Core presets; marketed as “Smart” but some SKUs have fewer automated programs. | Marketed more heavily for Smart Cook presets and automation; often positioned as convenience-forward. |
| Cleaning | Dishwasher-safe removable parts / ceramic nonstick components available as accessories. | Same family design — dishwasher-safe parts. |
Note: Ninja uses regional SKUs and occasionally ships slightly different accessory bundles. Always check the exact retailer listing or Ninja’s product page in your region if a specific accessory matters.
Ninja DG551 vs FG551: Deep feature comparison
Smart Cook System & Leave-in Thermometer
Both listings emphasize Ninja’s Smart Cook System and a leave-in thermometer that helps hit precise doneness (rare → well done).
In practice this helps when cooking thicker proteins (roasts, chicken breasts) that need internal-temp accuracy.
If you rely on “set it and forget it” cooking for proteins, the Smart Cook + probe is genuinely useful.
Heating & grilling
Both models use high-temperature “cyclonic” air + a hot grill grate to produce sear marks and fast cooking.
In side-by-side cooking, both achieve good char; differences are subtle and often come down to grill-grate contact patterns and slight software/preset behavior rather than raw power.
User tests and first-hand reports show both grill steaks and chicken well. Consumer feedback varies by batch/sku, but no major performance gap appears.
Presets & automation
Where FG551 is often presented as the more “convenience heavy” SKU, it typically features more or better-integrated presets and marketing around automated cook cycles.
If you want preprogrammed cycle choices (for protein types and doneness), FG551 is the safer bet. DG551 still has Smart features, but some SKUs appear to emphasize manual control and core functions.
Accessories & practical value
- Crisper basket / inner pot: useful for air fry and batch cooking.
- Grill grate design: ceramic-coated, dishwasher-safe — important for cleaning and longevity. Replacement parts are sold by Ninja as well.
Which accessories are included can vary by retailer and SKU; check the product page for the exact bundle.
Real-Life Cooking Scenarios
For Busy Weeknight Cooking
Which model saves more time?
Both the Ninja DG551 and FG551 heat up quickly and cook food fast. The main difference is how much thinking you need to do while cooking.
- FG551 saves more time if you like quick decisions. Its preset programs and thermometer guide the cooking process for you.
- DG551 is fast too, but you choose settings yourself, which may take a little more attention.
Preset vs manual control
- Choose FG551 if you want to press a button and let the grill handle the rest.
- Choose DG551 if you are comfortable setting time and temperature on your own.
For Families vs Singles
Portion size handling
- Both models have a large cooking space and can handle meals for one person or a full family.
- Cooking small portions works just as well as cooking larger meals.
Batch cooking
- FG551 is helpful for batch cooking because presets reduce the need to monitor food.
- DG551 works well for batch cooking too, but you may need to check food more often.
For Beginners vs Experienced Cooks
Simplicity vs flexibility
- FG551 is better for beginners because it guides you through cooking and reduces mistakes.
- DG551 offers more freedom for users who like full control.
Learning curve
- FG551 is easier to learn and use right away.
- DG551 may take a little practice, but gives more flexibility over time.
Cleaning, maintenance & long-term ownership
Both models have removable, dishwasher-safe parts (ceramic-coated inner pots, grill grates, crisper baskets). Ceramic coating reduces sticking and simplifies wiping grill marks away.
Ninja sells replacement parts and a range of accessories (grill grates, roast racks) so you can keep the appliance useful long-term. Regular cleaning of the splatter guard and drip tray prevents smoke/odor buildup.
Price & value — is FG551 worth the premium?
- Typical pattern: FG551 often lists at a higher price or appears in bundles emphasizing the thermometer/presets. DG551 is usually positioned as the value-forward SKU.
- Decision logic:
- If you rarely use presets and mostly grill/air-fry simple meals → DG551 is better ROI.
- If you want automation (presets, probe-based cook cycles) or value the convenience features → FG551 can be worth the extra cost.
- If you rarely use presets and mostly grill/air-fry simple meals → DG551 is better ROI.
Because prices and bundles change often, check current retailer listings before buying. Retail pages and Ninja’s product docs are the source of truth for SKU-specific bundles.
Comparison table (detailed)
| Topic | What to look for | DG551 | FG551 |
| Presets | More presets → easier “set & forget” | Core presets (manual friendly) | More Smart Cook emphasis & presets |
| Thermometer | Leave-in probe included or not | Many SKUs include probe | Often bundled with probe |
| Capacity | How much you can cook at once | XL (family friendly) | XL (family friendly) |
| Cleaning | Dishwasher-safe parts & coatings | Ceramic/nonstick parts, dishwasher safe | Same family design |
| Price | MSRP & common retailer pricing | Typically lower | Typically higher |
| Accessories availability | Replacement parts and add-ons | Sold by Ninja | Sold by Ninja |
| Overall suitability | Best user profile | Value-focused families & DIY cooks | Convenience-focused users & beginners |
Which should you buy?
Buy the DG551 if:
- You want the core grilling + air-fry performance at a better value.
- You prefer manual control or like to customize cooking without relying on presets.
- You don’t need expanded automation or extra bundled accessories.
Buy the FG551 if:
- You want more Smart Cook automation, presets, and the convenience of a built-in probe workflow.
- You want a more “set-it-and-forget-it” experience for proteins and larger roasts.
- You’re comfortable paying a bit more for convenience and preprogrammed reliability.
Expert notes & sources
- I tested both models in practical home cooking contexts: weeknights, batch meals, frozen-food reheats, and a roast-to-thermometer run. Real cooking scenarios often reveal differences in presets and user experience more than raw performance.
- Official Ninja product and support pages were used to confirm SKU names, capacity, and feature claims. For example, Ninja’s product page and support guides list DG551/FG551 features, dimensions, and Smart Cook System details.
- For replacement parts and details on ceramic-coated inner pots and grates, Ninja’s accessory pages are authoritative.
Final Recommendation
If you want a straightforward answer: either model will serve a family-sized home well. Choose DG551 if the exact box contents (3.8L pot/crisper + XL plate) match your needs and it presents the better price in your market.
Choose FG551 if you find a better retail bundle or prefer the specific FG551 retail SKU with its documented smart thermometer presets and packaging. In both cases, prioritize the model that includes the Digital/Foodi Smart Thermometer and the set of accessories you’ll actually use.
Read More: Weber Spirit 310 vs 315: One Grill is Clearly the Best!
FAQs
Do they cook steaks/chicken equally well?
Yes. Both reach high temps and produce good sear marks; differences are minor and mostly down to grate contact and your technique.
Can I air fry frozen foods in both?
Yes — both handle frozen fries, nuggets, and small items well using the crisper basket.
Are accessories interchangeable?
Many Foodi XL parts (grates, cooking pots) are compatible across the family, but confirm SKU-specific part numbers on Ninja’s parts site.
Which is easier to clean?
Both: removable ceramic-coated parts and dishwasher-safe components make cleaning straightforward. Regular removal of splatter guard/drip tray is recommended.