Microwave ovens became a mainstream household appliance in the mid-to-late 1980s, but their journey from military technology to kitchen countertop took about four decades. The first commercial unit hit the market in 1946, a countertop version arrived in 1967, and by 1986 a quarter of American homes had one. Today, over 90% of U.S. households own a microwave.
From Radar Technology to a $5,000 Oven
The microwave oven exists because of a happy accident during World War II. Percy Spencer, an engineer at the defense contractor Raytheon, noticed that radar equipment he was working with had melted a chocolate bar in his pocket. Raytheon filed a patent for a microwave cooking process on October 8, 1945, and the first commercial model, called the Radarange, went on sale in 1946.
This was not a kitchen appliance. The Radarange stood nearly six feet tall, weighed more than 750 pounds, and cost $5,000, which is over $50,000 in today’s dollars. It was designed for restaurants, railroads, and ocean liners. For the average family, it was completely impractical.
The First Home Model: 1967
The real shift toward consumer use came in 1967, when Amana (a division Raytheon had acquired) introduced a compact countertop version of the Radarange. This was the first microwave oven specifically designed for home kitchens. It was smaller, lighter, and far cheaper than the original, though still a luxury item by the standards of the time. As of 1971, less than one percent of U.S. households owned one.
The 1980s Explosion
The decade that truly made microwaves popular was the 1980s. Several forces converged at once. Falling manufacturing costs brought prices down steadily, following a predictable pattern: as a new technology gets cheaper to produce, more people buy it, which drives prices down further. Bureau of Labor Statistics data shows that the percentage of households buying a microwave in any given year climbed throughout the early 1980s, peaking around 1986 at 8% of all consumer units making a purchase that year.
Demographics played a major role too. Women’s labor force participation was rising sharply, creating demand for time-saving kitchen devices. Baby boomers were hitting their peak earning years, giving them the disposable income to stock their kitchens with new technology. The microwave was perfectly positioned for this moment: it dramatically cut cooking times, which mattered a great deal to households where both adults worked outside the home.
By 1986, 25% of American households owned a microwave, up from under 1% just fifteen years earlier. Average spending on microwave ovens peaked in 1984, then began to decline, not because people stopped buying them, but because prices kept falling. By the late 1980s, microwaves were cheap enough that they no longer represented a significant household purchase.
From Luxury to Near-Universal
Through the 1990s, ownership rates continued to climb as microwaves became standard in new homes, apartments, and office break rooms. Prices dropped to the point where a basic model cost well under $100. The appliance shifted from a novelty to something most people simply expected a kitchen to have.
Today, over 90% of U.S. households own at least one microwave oven. The market is still growing modestly, with projections of about 4% annual growth through 2034, driven largely by replacement purchases and new household formation rather than first-time buyers. What was once a 750-pound military curiosity is now as standard as a toaster.
Key Dates at a Glance
- 1945: Raytheon files the first patent for microwave cooking
- 1946: The Radarange goes on sale for commercial use
- 1967: Amana releases the first countertop model for homes
- 1971: Less than 1% of U.S. households own one
- 1984: Average household spending on microwaves peaks
- 1986: 25% of U.S. households own a microwave
- Today: Over 90% household ownership in the U.S.