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Yes—if counter space and multi-function cooking matter more to you than maximum air-fryer browning or tall-roast capacity. The Ninja Flip SP151 combines a convection oven, air fryer and toaster with eight modes, then flips upright against the backsplash for storage. RTINGS’ 2025 testing gave it 8.0/10 overall, with especially strong toasting and baking performance. Its compromises are equally important: only about 3.3 inches of usable interior height, occasional undercooking when air frying, and a preheat alert that can arrive before the chamber is fully at temperature. Ninja advertises a 12-inch pizza and up to four pounds of air-fry food, while the independent test fit an 11-inch pizza. This review explains which claim applies to your cooking, how to plan the footprint, and which accessories and settings make the SP151 worthwhile.
What is the Ninja Flip SP151?
The SP151 is a countertop convection oven that also performs air-frying, roasting, broiling, baking, pizza cooking, toasting, bagel heating and dehydrating. Ninja’s defining design lets the oven flip up and away against the backsplash when it is not in use, freeing most of the counter in front of it. In operating position it functions like a horizontal toaster oven; in storage position it stands vertically.
Ninja describes the appliance as a “convection oven, air fryer, and toaster that crisps and flips up and away.” The package includes an air-fry basket, sheet pan, wire rack and removable crumb tray. Construction is stainless steel, and the manufacturer specifies 1,800 watts, 120 volts, a 32-inch power cord and a one-year limited warranty.
The flip mechanism solves a real small-kitchen problem, but it does not make the oven physically tiny while cooking. You still need a stable, heat-safe operating location and enough clearance to open the door and load the rack. Measure the position in which you will cook, not only the upright storage position.
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Is the Ninja Flip SP151 worth it?
It is worth considering when one appliance must handle toast, reheating, baking and occasional air frying while disappearing against the backsplash between uses. RTINGS rated it 8.0/10 for mixed use, 8.0/10 for toasting, 7.5/10 for air frying and 7.2/10 for cooking capacity in 2025 testing.
The strongest case is convenience: uniform chamber temperatures, quick heating, reliable toast and a broad set of modes in a counter-saving body. The weaker case is capacity and air-fry consistency. A low ceiling limits tall food, and some air-fried items were undercooked in testing; a drawer-style air fryer can brown more evenly. If your priority is whole chickens, tall loaves or large batches of crisp food, choose a taller or dedicated appliance instead.
| Decision factor | What the SP151 offers | What to watch |
|---|---|---|
| Counter space | Flips upright for storage against the backsplash | Plan the larger operating footprint and door clearance |
| Functions | Eight modes in one appliance | Each mode shares a shallow chamber |
| Air frying | Basket and convection airflow; Ninja advertises up to 4 lb | Some food may need extra time or rearranging |
| Toasting | Fast, even results in independent testing | Use the correct shade and slice count for repeatability |
| Pizza | Ninja advertises a 12-inch pizza | RTINGS fit an 11-inch pizza in its tested chamber |
| Height | About 3.3 inches of usable interior height in testing | Tall roasts, whole chickens and high loaves are difficult or impossible |
How well does the SP151 air fry?
The SP151 air-fries competently, but it is not the most consistent option for crisping. RTINGS scored air frying 7.5/10 and observed occasional undercooking. The shallow cavity and basket arrangement can leave thicker pieces less done, so inspect food rather than relying solely on the programmed time.
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What to do for more even results
- Spread food in a single layer in the supplied basket; crowding blocks the convection airflow that creates browning.
- Turn or shake food partway through cooking, especially when pieces vary in thickness.
- Check the center of the thickest piece before serving. Add short intervals rather than assuming the preset is complete.
- Use the supplied pan beneath the basket to catch drips and keep the crumb tray cleaner.
Ninja’s “up to four pounds” statement is a maximum advertised load, not a guarantee that every four-pound batch will brown evenly. A smaller, less crowded batch is the safer choice when texture matters more than throughput.
Does the SP151 toast evenly and quickly?
Toasting is one of the SP151’s best uses. RTINGS gave it 8.0/10 for toasting and measured 4 minutes 32 seconds to produce golden-brown toast from six slices. The result reflects that test setup; bread thickness, starting temperature and selected shade will change the time in your kitchen.
Use the dedicated toast mode for standard sliced bread and the bagel mode when you want one side treated differently. Start with a middle shade, then adjust after observing one cycle. Because the oven has strong temperature uniformity but can fluctuate, keep your preferred shade setting consistent rather than changing several variables at once.
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How do baking, roasting, broiling and reheating perform?
Independent testing found strong baking and reheating results, along with excellent temperature uniformity and generally good stability. The SP151 is therefore more convincing as a compact oven for baked goods, leftovers and moderate-height trays than as a replacement for a full-size oven.
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Use the supplied sheet pan or wire rack according to the recipe’s required heat circulation. The oven’s low roof favors cookies, flat pastries and other shallow items. Leave room around the pan so convection air can move; a pan that nearly touches the walls can defeat the benefit of the fan.
Roasting
Roast smaller cuts or vegetables that fit below the approximately 3.3-inch usable height measured by RTINGS. Tall roasts and whole chickens are poor matches because the food can contact the upper element or simply fail to fit.
Broiling
Broiling places food close to intense top heat. Watch the surface continuously during the final minutes and use the rack position recommended by the recipe. The shallow chamber means browning can happen quickly even when the center still needs cooking.
Reheating
Convection reheating is a practical reason to keep the SP151 accessible. Use a pan that catches cheese, crumbs or sauces, and check the center of dense food before serving. The independent test’s generally good reheating assessment does not remove the need to verify food temperature.
Will the SP151 fit a 12-inch pizza?
Ninja advertises capacity for a 12-inch pizza, but RTINGS reported that an 11-inch pizza fit in its tested chamber. Treat 12 inches as the manufacturer’s stated maximum and 11 inches as the independently confirmed size from that test. Pan rims, handles and the exact pizza shape can reduce usable diameter, so measure your preferred pan rather than assuming every 12-inch product will slide in.
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The pizza mode is useful for frozen or fresh pizzas that fit the chamber’s diameter and height. A thick, high-rising pizza can run into the same vertical-clearance limitation that affects tall roasts. If your normal pizzas are larger than 11 inches or use a deep pan, verify the interior and pan dimensions before buying.
How much counter space does the flip design save?
The design saves counter depth when the oven is stored upright, but published dimensions use different orientations and measurement conventions. RTINGS measured the tested unit at 16.9 × 15.9 × 7.7 inches; Ninja lists product dimensions of 19.13 × 10.2 × 18.43 inches. These numbers are not contradictory measurements of the same orientation: one set describes the independent test’s external footprint, while the manufacturer’s diagram uses its own reference points and operating/storage geometry.
For installation, measure three zones:
- Operating footprint: the full width and depth with the door open and the oven resting normally.
- Storage footprint: the height and depth when flipped upright against the backsplash.
- Safety clearance: open space around vents, the door and hot surfaces, following the manufacturer’s diagram.
Do not slide the unit into its upright position while it is hot. Let it cool, remove loose accessories and ensure the hinge path is clear before flipping it up.
What temperature, power and preheat performance should you expect?
RTINGS measured a temperature range of 85–450°F, a maximum power draw of 1,720 watts and 1 minute 45 seconds to reach 350°F. Ninja’s specification is 1,800 watts at 120 volts. The difference between the rated wattage and the measured draw is expected because one is a manufacturer electrical rating and the other is a test measurement under stated conditions.
The preheat reminder deserves attention. RTINGS found that the notification can appear before the chamber has fully reached the selected temperature. For recipes sensitive to temperature—such as cakes, pastries or high-heat pizza—allow the oven to stabilize after the alert, or verify with an oven thermometer, rather than treating the beep as proof of exact temperature.
What are the eight cooking functions?
| Function | Best fit | Practical limitation |
|---|---|---|
| Air Fry | Small, spread-out portions needing crisping | Thick or crowded food can undercook |
| Roast | Vegetables and short cuts of meat | Low ceiling limits tall items |
| Broil | Fast surface browning | Requires close visual monitoring |
| Bake | Shallow baked goods and casseroles | Pan height must stay below the chamber roof |
| Pizza | Pizzas that fit the measured diameter | Independent test confirmed 11 inches; 12 inches is advertised |
| Toast | Standard sliced bread | Shade and bread variables affect timing |
| Bagel | Bagels needing a dedicated cycle | Use the supplied rack and keep toppings clear of elements |
| Dehydrate | Low-temperature drying of thin foods | Small chamber limits batch size |
How do I set up and use the SP151 safely?
- Place the oven on a level, heat-resistant counter with the operating clearance shown in the manufacturer’s instructions.
- Install the removable crumb tray before cooking. Position the wire rack, sheet pan or air-fry basket according to the selected function.
- Plug the 120-volt appliance directly into a suitable outlet. Its rated 1,800-watt load is substantial; avoid sharing an overloaded outlet with other high-power heating appliances.
- Select the function, temperature and time. Remember that the preheat signal may arrive early.
- When cooking air-fried food, leave space between pieces and turn or shake them as needed.
- Use heat-resistant gloves when removing accessories. Let the oven cool before flipping it upright.
- After cooling, remove crumbs and wipe the interior and accessories according to the care instructions. Ninja states that the unit is not dishwasher safe.
Which accessories fit the SP151?
Model-specific replacement parts are available under these names and part numbers:
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| Part | Part number | Use |
|---|---|---|
| Flip Wire Rack | 251SH150 | Rack-level baking, toasting and broiling |
| Flip Sheet Pan | 252SH150 | Tray cooking and catching drips |
| Flip Air Fry Basket | 253SH150 | Convection air frying |
| Flip Crumb Tray | 254SH150 | Collecting crumbs beneath the cooking area |
Check that the package or listing explicitly identifies SP151 compatibility before ordering. Accessories that look similar can differ in width, hinge clearance or edge height, and a poorly fitting tray can interfere with the door or airflow.
What are the SP151’s main advantages and drawbacks?
Advantages
- Flip-up storage can return valuable counter depth in a small kitchen.
- Eight functions cover everyday toast, bagels, baking, roasting, broiling, pizza, air frying and dehydrating.
- Independent testing found excellent temperature uniformity and generally good stability.
- Toasting, baking and reheating are stronger than the air-frying score alone suggests.
- The supplied basket, pan, rack and crumb tray let you use the core functions without buying a starter kit.
Drawbacks
- The approximately 3.3-inch tested height excludes many tall foods.
- Air-frying can leave some food undercooked, especially when crowded or thick.
- The preheat reminder may signal before the selected temperature is fully reached.
- The appliance is not dishwasher safe according to the official product information.
- Published dimensions vary by orientation and measurement method, so careless planning can lead to a poor fit.
How does the SP151 compare with a drawer air fryer or a larger toaster oven?
The SP151’s meaningful comparison is not a single score; it is a trade-off between footprint, height and specialization. A drawer-style air fryer generally has an advantage in concentrated air-fry browning, while a larger toaster oven generally has more vertical and pan capacity. The SP151 wins when one shallow appliance must cover several jobs and then store upright.
| Choose this type | When it makes sense | Trade-off versus SP151 |
|---|---|---|
| SP151 | You need toast, baking, reheating and occasional air frying, with upright storage | Shallow cavity and mixed air-fry consistency |
| Drawer-style air fryer | Crisp, evenly browned batches are the main priority | Usually fewer oven and toast functions; storage footprint depends on the model |
| Taller toaster oven | You cook whole chickens, tall loaves or deep dishes | Typically occupies more counter space and may not flip away |
Before comparing prices, compare the dimensions in the orientation you will actually use, the largest pan you own, included accessories, replacement-part availability, warranty length and return policy. Prices, stock, ratings and return terms change, so verify them at the time you buy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What should you check before buying?
- Measure first: confirm both operating and upright-storage clearances, including the hinge path.
- Inventory your pans: measure your largest pizza, baking dish and roasting item against the low interior height.
- Choose your primary use: buy for the functions you will use weekly, not the full list of eight modes.
- Plan electrical load: account for the 1,800-watt rating on a 120-volt circuit.
- Accept manual cleaning: the unit is not dishwasher safe, so allow time to wipe the cavity, tray and accessories.
- Confirm the model: replacement parts listed for SP151 use the 251SH150, 252SH150, 253SH150 and 254SH150 identifiers.
- Review current terms: verify the one-year limited warranty, retailer return window and current price before placing an order.
How do I troubleshoot common SP151 problems?
Food is browned outside but undercooked inside
Reduce the load, separate pieces and turn them during cooking. For thick food, add time in short increments and check the center; the independent air-fry test documented occasional undercooking.
The preheat alert sounds too soon
Treat the alert as a prompt to begin checking, not as laboratory confirmation. Allow additional stabilization time or verify the cavity with an oven thermometer when a recipe depends on precise heat.
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A roast or loaf does not fit
Measure the item’s height including the pan or rack. The tested usable height is about 3.3 inches, so switch to a shallower vessel or use a taller oven for that recipe.
Best Value
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- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
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The oven will not store upright
Let it cool completely, remove accessories and clear the hinge path. Do not force the flip mechanism or store the oven while hot.
Replacement accessories seem loose
Check the model marking and match the exact SP151 part number. A tray that is close in size but not designed for this oven can obstruct the door, alter airflow or sit unsafely near the elements.
Who should buy the Ninja Flip SP151?
Buy it if you want a compact, multi-purpose oven that can disappear upright and you mostly cook toast, bagels, reheated food, shallow bakes, vegetables, pizza and modest air-fry portions. Its 8.0/10 mixed-use result and 8.0/10 toast score support that everyday role.
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Frequently Asked Questions
Can I leave the SP151 flipped up immediately after cooking?
No. Let the oven and accessories cool first, then remove loose parts and check that the hinge path is clear before storing it upright. Flipping a hot appliance can expose the backsplash and your hands to residual heat.
Why do listings show different SP151 dimensions?
The manufacturer and independent testers measure different orientations and reference points. Use the operating footprint for counter planning, the upright dimensions for storage, and the manufacturer’s diagram for required clearances rather than comparing one number in isolation.
Is the four-pound air-fry capacity a guaranteed batch size?
It is Ninja’s advertised maximum, not an assurance that every four-pound load will brown evenly. Airflow improves when food is spread out, so smaller batches may produce more consistent texture.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsWhat should I do if my 12-inch pizza barely fits?
Measure the pizza pan’s outside diameter, including its rim or handles, and compare it with the usable chamber. The independent test confirmed an 11-inch pizza, so a nominal 12-inch size may require a thin, rimless pizza or may not fit at all.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
