You might use your microwave oven every day without a second thought. But have you ever wondered when were microwave ovens available to the public? The journey from a accidental discovery to a kitchen essential is a fascinating story of innovation and changing lifestyles.
It all started just after World War Two. The first model was nothing like the compact countertop appliances we know today. It was large, expensive, and a bit intimidating. This article walks you through the key dates, models, and social changes that brought microwave cooking into homes across the world.
When Were Microwave Ovens Available to the Public
The first microwave oven for public sale was introduced in 1947. It was called the “Radarange,” made by the Raytheon company. This was the direct result of Percy Spencer’s famous discovery.
Spencer, a Raytheon engineer, was testing a magnetron (a vacuum tube that generates microwaves) when he noticed a candy bar in his pocket had melted. He experimented further with popcorn kernels and an egg, which famously exploded. He realized the microwaves could cook food quickly.
Raytheon saw the potential and filed for a patent in 1945. By 1947, they had a working commercial model ready.
The 1947 Radarange: The First Public Model
This first public microwave oven was a very different beast.
- Size and Weight: It stood nearly 6 feet tall and weighed over 750 pounds. It was as big as a refrigerator.
- Cost: It was priced at a whopping $5,000. That’s equivalent to over $60,000 today, putting it far out of reach for most families.
- Power and Cooling: It required a special plumbing installation for water cooling and used a huge amount of electricity, about 3000 watts.
Because of its size and cost, it wasn’t aimed at home cooks. The primary customers were restaurants, railway kitchens, and ocean liners—places that needed to heat food fast for large numbers of people.
The 1950s: Slow Growth and Specialized Use
Through the 1950s, microwave technology remained mostly in commercial settings. Companies like Raytheon and Tappan worked on refining the design. In 1955, Tappan introduced a somewhat smaller, wall-mounted home model, but it still cost about $1,200 (over $12,000 today) and needed professional installation. Sales were very low.
The technology was still seen as a novelty for the wealthy or a specialized tool for industry. Most people in the 1950s cooked with conventional ovens and stovetops, and the idea of “electronic cooking” seemed strange or unnecessary.
The 1960s: The Breakthrough in Affordability
The real turning point came in 1967. Raytheon had acquired Amana Refrigeration in 1965, and together they launched the “Radarange” countertop microwave oven for homes. This was a game-changer for several reasons.
- Size: It was a countertop model, much more compact than its predecessors.
- Price: It was sold for under $500 (roughly $4,000 today). While still a significant purchase, it was now within the realm of possibility for many middle-class families.
- Safety and Convenience: It was designed to be plug-and-use in a standard home kitchen.
This model is widely considered the first truly successful home microwave oven. It began to change public perception.
The 1970s: Explosion in Popularity
This was the decade the microwave oven became a common household appliance. Several factors came together.
- Falling Prices: As more companies like Litton, Sharp, and Panasonic entered the market, competition drove prices down rapidly. By the mid-1970s, you could buy a basic model for under $300.
- Changing Lifestyles: More women were entering the workforce, creating a demand for faster meal preparation. The microwave’s speed was a perfect fit for busy families.
- Improved Technology: Ovens became safer, more reliable, and gained features like variable power settings and turntables for even cooking.
By 1975, over a million microwave ovens were sold in the United States each year. They were no longer a luxury; they were becoming a standard kitchen tool.
The 1980s and Beyond: A Kitchen Staple
By 1986, roughly 25% of American households owned a microwave oven. By the mid-1990s, that figure had soared to over 90%. The microwave had completed its journey from a curious, expensive machine to an indispensable part of modern life.
Today, advancements continue with inverter technology for more precise cooking, convection-microwave combos, and smart features. But the core function—fast, convenient heating—remains the same.
Key Milestones in Microwave Oven History
- 1945: Percy Spencer patents the cooking process after his magnetron experiments.
- 1947: Raytheon introduces the first commercial “Radarange” to the public (for institutional use).
- 1955: Tappan sells the first domestic, wall-mounted model, with limited success.
- 1967: Amana (a Raytheon subsidiary) launches the first popular countertop home microwave, priced under $500.
- 1970s: Prices drop, sales skyrocket. Microwave ownership becomes widespread.
- Late 20th Century: Becomes a standard appliance in over 90% of U.S. homes.
Why Did It Take So Long to Catch On?
Even after the 1967 Amana model, it took years for microwaves to become ubiquitous. Public hesitation was due to a few key factors.
- Cost: The initial investment was high compared to traditional appliances.
- Safety Fears: Early on, there was public anxiety about radiation leaks, despite the ovens being designed with safe, sealed doors. These fears were largely unfounded but persisted in the media.
- Learning Curve: People didn’t know how to cook with them. Recipes were scarce, and results could be uneven (soggy or rubbery food) without proper technique. Manufacturers had to educate consumers.
- Cultural Resistance: Some viewed it as “cheating” or producing inferior food compared to traditional cooking methods. It took time for the convenience benefit to outweigh this perception.
How the Microwave Changed Cooking and Culture
The impact of the microwave oven extends far beyond just heating leftovers.
Changes in Food Manufacturing
The microwave created entirely new product categories. Frozen dinners (“TV dinners”) evolved into microwaveable meals. Popcorn was revolutionized, moving from stovetop to microwave packets. The need for microwave-safe packaging changed how food was sold.
Changes in Kitchen Design
Kitchens began to be designed with a designated spot for the microwave. The appliance’s compact size also influenced the trend toward smaller, more efficient living spaces, as it reduced the need for a large traditional oven for many tasks.
Changes in Daily Life
It fundamentally altered the concept of meal timing. Family members could eat at different times with easy reheating. It made breakfast faster, simplified snack preparation, and reduced cleanup. For better or worse, it supported a faster-paced, on-the-go lifestyle.
Common Microwave Myths and Facts
- Myth: Microwaves cook food from the inside out.
Fact: They actually heat the outer layers first. Microwaves penetrate food to a depth of about 1-1.5 inches, and heat then conducts inward. A large, dense item like a roast will still have a cold center if not given time for the heat to spread. - Myth: They make food radioactive or destroy all nutrients.
Fact: Microwaves use non-ionizing radiation, which does not make food radioactive. In terms of nutrients, any cooking method breaks down vitamins and minerals. Microwaving, often with less water and shorter time, can actually preserve more nutrients than boiling. - Myth: You shouldn’t stand too close to a running microwave.
Fact: Modern microwaves are designed with strict safety standards to contain radiation. As long as the door seal is intact and undamaged, the amount of leakage is far below levels considered harmful.
Choosing and Using Your Microwave Today
If you’re in the market for a new microwave, here are the main types.
- Solo (Basic) Microwave: For standard heating, defrosting, and simple cooking. This is the most common and affordable type.
- Grill Microwave: Includes heating elements to brown and crisp food, giving you better texture on items like chicken or toast.
- Convection Microwave: Combines microwave energy with a fan and heating element to circulate hot air. This allows for real baking, roasting, and browning, acting like a small traditional oven.
To use your microwave effectively.
- Arrange food evenly in a circle for best results.
- Use lids or microwave-safe covers to trap steam for more even cooking and to prevent splatters.
- Stir or rotate food halfway through the cooking time to eliminate cold spots.
- Let food stand for a minute or two after cooking; the heat continues to distribute during this time.
Frequently Asked Questions (FAQ)
When did microwaves become common in homes?
Microwave ovens became common in homes during the 1970s and widespread by the 1980s. Sales boomed after the introduction of affordable countertop models in the late 1960s, leading to over 90% household penetration in the United States by the mid-1990s.
What was the first home microwave oven?
The first microwave oven marketed for home use was the Tappan wall-mounted model in 1955. However, the first successful and popular home microwave was the Amana Radarange countertop oven introduced in 1967, which is often credited with starting the home microwave revolution.
How much did the first microwave cost?
The first commercial microwave oven, the 1947 Raytheon Radarange, cost about $5,000. Adjusted for inflation, that is more than $60,000 in today’s money. It was intended for restaurants and ships, not for ordinary consumers.
Who invented the microwave oven?
The microwave oven was invented by Percy Spencer, an engineer working for the Raytheon Corporation. His discovery in 1945 was accidental, occuring when he noticed microwaves from a magnetron melted a candy bar in his pocket. Raytheon patented the idea and developed the first commercial oven.
Are microwave ovens safe?
Yes, modern microwave ovens are very safe when used according to the manufacturer’s instructions. They are built with multiple safety interlocks to prevent operation with the door open. The non-ionizing radiation they use does not make food radioactive, and any minimal leakage from a well-maintained oven is far below harmful levels.
What were early microwaves like?
Early microwaves, from the late 1940s and 1950s, were enormous, heavy, and expensive. They were often the size of a refrigerator, required special wiring and water cooling, and were primarily sold to institutions like hotels and hospitals, not to the general public for home use.
The Lasting Impact
The story of when microwave ovens became available to the public is a classic tale of technology transition. From a multi-thousand-dollar specialty machine in 1947 to a under-$50 essential today, its path was shaped by cost reduction, clever marketing, and shifting social needs. It solved a growing demand for speed and convenience in the kitchen.
While it didn’t replace traditional cooking, it carved out a vital niche. It changed how we design food, package it, and schedule our meals. Next time you heat a cup of coffee or pop in a bag of popcorn in minutes, you’re benefiting from a invention that took decades to find its place in our homes. The microwave’s journey from lab accident to kitchen counter is a defining chapter in the history of modern appliances.