Air Fryer vs Convection Oven: Which Actually Saves You Money?

Stop believing the hype: air fryers are not automatically cheaper to run than convection ovens. After a month of side-by-side testing with four popular models, tracking every kilowatt-hour and dollar spent, I found the truth is more nuanced. While air fryers often win on speed, convection ovens can actually cost less over time—especially if you cook for more than two people. Here’s what the data says.

The Contenders

For this head-to-head, I tested four appliances that represent the best in each category:

• Breville Smart Oven Air Fryer Pro – a premium convection oven with air fry capability (see our Best Time to Buy guide for deals)
• Cosori Pro II Air Fryer (5.8 qt) – a mid-range dedicated air fryer
• Cuisinart TOA-60 Convection Toaster Oven – a compact, affordable convection oven
• Ninja Air Fryer Max XL (5.5 qt) – a popular basket-style air fryer

I chose these because they cover the spectrum from budget to premium, and each is a top seller on Amazon.

What We Tested

Methodology

Over four weeks, I cooked 10 identical meals in each appliance: frozen french fries, chicken thighs, roasted vegetables, baked potatoes, and a full sheet-pan dinner. I used a Kill A Watt EZ meter to measure energy consumption from preheat to finish, and calculated costs using the U.S. average electricity rate of $0.14/kWh. I also factored in purchase price and estimated a 5-year lifespan for both categories.

Key Metrics

• Energy used per cook cycle (kWh)
• Time to cook (minutes)
• Purchase price (MSRP at time of testing)
• Estimated annual energy cost (based on 5 uses per week)
• Total cost of ownership over 5 years (purchase + energy)

All tests were done in a 70°F kitchen with consistent batch sizes.

Design & Build

Air Fryers (Cosori Pro II & Ninja Max XL)

Both are basket-style: a drawer slides out, you dump food in, and a high-speed fan circulates hot air. They’re compact—footprint about 12x12 inches—and lightweight (under 12 lbs). The Cosori has a digital display with 12 presets; the Ninja has a simpler dial. Build quality is decent for the price, but the plastic housing feels less durable over time. The nonstick basket coatings on both started showing minor scratches after two weeks of gentle use.

Convection Ovens (Breville Smart Oven & Cuisinart TOA-60)

These are countertop ovens with heating elements and a convection fan. The Breville is a beast: 21.5 x 17 x 12 inches, heavy (21 lbs), with stainless steel build and precise temperature control. The Cuisinart is smaller at 15.5 x 12 x 11 inches and lighter, but still feels sturdier than the air fryers. Both have wire racks and baking trays. The Breville’s air fry function uses a mesh basket accessory. The Cuisinart lacks a dedicated air fry mode but the convection fan works well enough for crisping.

Verdict: Convection ovens win on build quality and versatility. The Breville is a tank; the Cuisinart punches above its weight. Air fryers are more portable but feel less premium.

Performance

Cooking Results

For frozen fries (400°F target), the air fryers were faster: Cosori cooked in 14 minutes, Ninja in 16, while the Breville took 20 minutes and the Cuisinart 22. Crispiness was comparable—air fryers edge ahead slightly due to more focused airflow. For chicken thighs, the convection ovens produced more evenly cooked skin with better browning. Roasted vegetables were a tie. But for a full sheet-pan dinner (chicken + veggies), the air fryers couldn’t handle the volume—I had to do two batches, negating the speed advantage.

Energy Consumption

This is where the surprise hit. Per cook cycle:

Appliance	Energy Used (kWh)	Cost per Cook ($0.14/kWh)
Cosori Pro II	0.63	$0.09
Ninja Max XL	0.71	$0.10
Breville Smart Oven	0.82	$0.11
Cuisinart TOA-60	0.55	$0.08

Small batches: air fryers use comparable energy to convection ovens due to shorter preheat. But for larger batches (e.g., 2 lbs of fries), the air fryers needed two cycles, doubling energy to ~1.3–1.4 kWh vs. 0.82 kWh for the Breville. The Cuisinart, thanks to its smaller cavity, stayed efficient even for full loads.

Time Breakdown

Preheat times: air fryers 3–4 min, convection ovens 5–8 min. Actual cooking times were 20–30% shorter in air fryers for small batches, but for family-sized meals, convection ovens often finished first because they could cook everything at once.

Price & Value

Purchase Price (MSRP)

• Cosori Pro II: $79.99
• Ninja Max XL: $99.99
• Cuisinart TOA-60: $89.95
• Breville Smart Oven Air Fryer Pro: $299.95

5-Year Total Cost of Ownership

Assuming 5 uses per week (260 per year) for 5 years:

Appliance	Purchase	Energy Cost/Year	Energy Cost 5 Years	Total 5-Year Cost
Cosori Pro II	$80	$23.40	$117	$197
Ninja Max XL	$100	$26.00	$130	$230
Cuisinart TOA-60	$90	$20.80	$104	$194
Breville Smart Oven	$300	$28.60	$143	$443

Surprise: The Cosori Pro II and Cuisinart TOA-60 are nearly identical in total cost over 5 years, despite one being an air fryer and one a convection oven. The Breville is the costliest due to its high purchase price, but it’s the most versatile—it can replace a toaster, oven, and air fryer.

Value for Different Users

• Singles or couples who cook small batches: An air fryer (Cosori or Ninja) saves time and energy. The Ninja is slightly more expensive to run but offers better capacity for occasional guests.
• Families (3+) who cook larger portions: A convection oven like the Cuisinart TOA-60 is cheaper to own and more efficient because you can fit a full meal in one go. The Breville is overkill unless you want premium features.
• Tech enthusiasts who want one appliance to do everything: The Breville Smart Oven Air Fryer Pro is worth the investment if you have the budget and counter space. See our Best Time to Buy guide for deals.

Who Should Buy Which

Buy an Air Fryer if:

• You cook for 1–2 people most of the time
• You value speed over versatility
• Counter space is limited (air fryers are smaller)
• You’re on a tight budget (under $100)

Buy a Convection Oven if:

• You cook for 3 or more people regularly
• You want to replace a toaster oven and air fryer with one device
• You prefer even browning and larger capacity
• You don’t mind a slightly longer cooking time for big batches

Don’t Buy Either If:

• You already have a full-size oven with convection mode. It’s already paid for, and the energy savings from a countertop appliance won’t justify the purchase for most people.

Final Verdict

The Winner: Convection Oven (Cuisinart TOA-60)

For pure cost savings over 5 years, the Cuisinart TOA-60 convection toaster oven is the champion. It tied with the Cosori air fryer in total cost but offers larger capacity, better build quality, and more cooking versatility. It’s not the fastest for small batches, but the energy efficiency for full meals makes it the smarter buy for most households.

Runner-up: Cosori Pro II Air Fryer – Best for small households that prioritize speed and simplicity.

Premium Pick: Breville Smart Oven Air Fryer Pro – If you want the Swiss Army knife of countertop cooking, go for it, but don’t expect it to save you money over cheaper options.

Bottom Line

If saving money matters most, skip the air fryer and buy a quality convection toaster oven like the Cuisinart TOA-60. It costs less to own over 5 years than most air fryers in its price range, while cooking more food in less hassle. Air fryers win on speed for singles, but for everyone else, convection ovens deliver better value without sacrificing crispiness.

Tested over 4 weeks in a controlled kitchen environment. Energy costs based on national average. Your results may vary depending on electricity rates and usage patterns.

Frequently Asked Questions

What is the main difference between an air fryer and a convection oven?

An air fryer is a compact appliance that uses a high-speed fan to circulate hot air, cooking food quickly and crisping it. A convection oven is larger and also uses a fan, but often provides more even heat distribution. Air fryers are typically basket-style, while convection ovens have racks and trays for versatile cooking.

How much does it cost to run an air fryer compared to a convection oven?

For small batches, air fryers cost about $0.09–$0.10 per use, similar to small convection ovens ($0.08–$0.11). However, for larger meals, convection ovens are more efficient because they can cook everything at once, while air fryers may require multiple batches, potentially doubling energy costs.

Why might a convection oven be cheaper overall than an air fryer?

While air fryers are faster for small portions, convection ovens often have a lower total cost of ownership over 5 years. They are more versatile, can handle larger meals without multiple batches, and some models use less energy per cook cycle. Additionally, they typically have a longer lifespan, offsetting the initial purchase price.

When should I choose an air fryer over a convection oven to save money?

Choose an air fryer if you cook for 1–2 people, prioritize speed, and make small batches frequently. They preheat faster and use less energy per small cook cycle. However, if you feed a family or cook larger items like sheet-pan dinners, a convection oven saves money by cooking everything in one batch, reducing overall energy use.