Best Essential Oil Diffusers of 2025

You can choose from hundreds of types of diffusers ranging in price from $10 to over $100. Before purchasing, consider these factors when choosing the best essential oil diffuser.

Tank capacity: The diffuser’s water capacity can range from 100 milliliters (3.4 fl oz) to over 1 liter (33.8 fl oz) of water, but the average water tank holds about 300 ml. You may need a larger water tank capacity if you don’t want to bother refilling water often, or if you want the diffuser to operate for a long time in a large area.

Run time and timers: Do you want to be able to set your essential oil diffuser for 1, 3 or 5 hours? Do you want the option of continuous operation of the scent and aroma mist? How much time do you need to run? These are all important questions to consider when purchasing a diffuser.

Automatic shutdown: Even if you’re not typically a forgetful person, choosing a diffuser with an auto-off feature is a smart move. If you forget to turn off your diffuser when there is little water left, it can overheat and fail.

Area coverage: For small rooms, such as a bedroom, bathroom, children’s bedroom, or small yoga studio, you don’t have to worry too much about the square footage covered by your diffuser. If you want to use it in an open space or large room, look for diffusers with a large square foot range.

lighting: Many diffusers offer ambient LED lights or double as night lights. This is a personal preference, so if you don’t want a light, make sure the aromatherapy diffuser you want to buy doesn’t have one or that you can turn it off easily.

Fog settings: Do you want a continuous cool mist that lasts for hours to distribute essential oil drops or an intermittent mist?

intensity: For a stronger scent, look for diffusers. A diffuser is a device that vaporizes oil droplets without the use of heat, before pumping the scent as a fine mist into the air. These are often more expensive than standard diffusers but may be worth it if you find that the standard models are not effective.

moisture: Many essential oil diffusers work as a cool mist humidifier. This can be a great two-in-one option if you live in a dry climate.