Berkey Water Filter Sizes: Which Size Do You Need?

Choosing the right Berkey® size isn't simply a matter of counting how many people live in your home. The better approach is to consider how much filtered water you use, how often you want to refill the system, and how much countertop space you have.

A smaller Berkey can work well for a household that uses relatively little filtered water or doesn't mind frequent refills. A larger system gives you more water between refills, but it also requires more counter space and vertical clearance.

Which Berkey Size Is Right for You?

Use this comparison as a starting point. Household recommendations are approximate because actual water use can vary significantly from one home to another.

These are starting points rather than fixed household-size rules. Someone living alone may prefer a larger system if they frequently fill reusable bottles or use filtered water for coffee, tea, and cooking. A larger household with lighter filtered-water use may be comfortable with a smaller model.

Berkey Size Recommendations at a Glance

Choosing Between Berkey Sizes

The biggest practical difference between Berkey® models is how much filtered water they can store between refills. As capacity increases, so does the system's physical size.

Go Berkey® vs. Travel Berkey®: Compact Options

The Go Berkey® is the smallest option at 1 quart and is primarily suited to personal use. The Travel Berkey® holds 1.5 gallons, giving you considerably more stored water while retaining the smallest footprint in the stainless-steel household lineup.

The Travel can be a practical choice for apartments, smaller kitchens, vacation properties, and other locations where countertop space is limited.

View Go Berkey® | View Travel Berkey®

Big Berkey® vs. Royal Berkey®: The Middle Ground

For many shoppers, the most useful comparison is Big Berkey® vs. Royal Berkey®.

The Big holds 2.25 gallons and measures approximately 8.5 inches in diameter. The Royal holds 3.25 gallons and measures approximately 9.5 inches in diameter. That means the Royal provides an additional gallon of storage while adding only about one inch of diameter.

Choose the Big when countertop space is more important. Choose the Royal when you regularly use the Big's capacity quickly and would prefer fewer refills.

View Big Berkey® | View Royal Berkey®

Imperial Berkey® vs. Crown Berkey™: Higher-Capacity Options

The Imperial Berkey® holds 4.5 gallons, while the Crown Berkey™ holds 6 gallons. Both are better suited to situations where larger amounts of filtered water are used throughout the day or where more water between refills is especially valuable.

Their main trade-off is physical size. Before choosing either model, measure both your available countertop area and the clearance above the system.

View Imperial Berkey® | View Crown Berkey™

What About Berkey Light®?

Berkey Light® has a 2.75-gallon capacity and uses a lightweight transparent housing rather than the polished stainless-steel construction of the Travel, Big, Royal, Imperial, and Crown models.

Its capacity falls between the Big and Royal, but housing style is a major part of the decision. If you're considering Berkey Light®, review its current product and filter-compatibility information separately.

View Berkey Light®

Big Berkey® vs. Royal Berkey®: Which One Should You Get?

If the Travel seems too small but the Imperial or Crown are larger than you need, the Big and Royal are usually the two models worth comparing most closely.

The Royal holds approximately 44% more water than the Big, while its diameter is roughly 1 inch larger. That makes this comparison relatively simple:

• Choose Big Berkey® when countertop space and versatility are the priorities.
• Choose Royal Berkey® when fewer refills and additional stored water matter more.

Don't Choose a Berkey Based on Household Size Alone

Household size is useful as an initial reference, but water-use habits can matter just as much.

Two people who fill several reusable bottles each day and regularly use filtered water for coffee, tea, and cooking can easily have a greater demand for filtered water than a larger household that uses the system mainly for drinking water.

Instead of asking only “How many people are in my household?”, ask:

How Much Filtered Water Does Your Household Use?

When estimating daily demand, remember that filtered water may be used for more than drinking. Common everyday uses include:

• Filling reusable bottles
• Making coffee or tea
• Cooking
• Serving guests
• Other household beverage preparation

You don't need to measure every glass. If you're uncertain, simply observe your household's use for several days. This will quickly show whether a 1.5- or 2.25-gallon system would require more frequent refilling than you'd prefer.

The EPA's Home Drinking Water Filtration Fact Sheet also provides general information on selecting and using household filtration systems.

How Often Do You Want to Refill Your Berkey®?

Refill frequency is one of the easiest ways to choose between two otherwise suitable sizes.

A smaller system can save valuable counter space, but you'll refill it more often. A larger system provides more stored water between refills, which can be especially convenient when several people use filtered water throughout the day.

If two models both fit your space and daily needs, choose the one that matters more to you: refill convenience.

Does Berkey Size Affect Flow Rate?

Capacity and flow rate are different specifications.

• Capacity is the amount of filtered water the lower chamber can store.
• Flow rate describes how quickly water can move through the installed primary elements under the stated conditions.

Some larger Berkey systems can accommodate additional primary elements. Adding compatible elements can increase the potential flow, but it does not increase the chamber's storage capacity.

If your main goal is fewer refills, focus on capacity first. If you also need to replenish water quickly throughout the day, compare the compatible element configuration and published flow information for the individual model.

Measure Your Countertop Before You Buy

A Berkey can technically fit on your countertop and still be inconvenient to use. Measure both width and vertical clearance before buying.

Check the Countertop Footprint

Consider:

• Where will the system sit?
• Is there enough clearance around the spigot?
• Will it interfere with nearby appliances?
• Can you comfortably position a glass, bottle, or container beneath the spigot?

Don't Forget Vertical Clearance

Measure from the countertop to the bottom of any overhead cabinet. The system needs enough space not only to stand upright but also for you to remove the lid and fill the upper chamber comfortably.

For comparison, the Big Berkey® is approximately 19.25 inches tall and 8.5 inches in diameter, the Royal is approximately 23 inches tall and 9.5 inches in diameter, and the Crown is approximately 30 inches tall and 11 inches in diameter.

More capacity isn't useful if the system becomes difficult to refill because it barely fits beneath your cabinets.

Does a Larger Berkey Need More Filter Elements?

Not necessarily. System size and filter-element configuration are separate specifications.

The stainless-steel lineup can accommodate up to:

• Travel Berkey®: 2 primary elements
• Big Berkey®: 4 primary elements
• Royal Berkey®: 4 primary elements
• Imperial Berkey®: 6 primary elements
• Crown Berkey™: 8 primary elements

Additional compatible elements can affect potential flow rate, but they do not change how much filtered water the lower chamber can hold.

What About Replacement Filters?

Replacement-filter availability and compatibility are worth understanding before buying, but they should not determine the system size on their own. Choose the system based primarily on capacity, refill frequency, and available space.

Current Berkey® systems sold on TheBerkey.com include Black Berkey® Elements. Customers can use those included elements according to the applicable maintenance and service-life guidance.

When replacement is eventually needed, Phoenix Gravity New Millennium Edition™ Filter Elements are currently the primary replacement option available through normal authorized U.S. distribution channels for compatible Berkey® systems.

Physical compatibility with another Berkey® housing does not automatically extend the Travel, Big, and Royal system-level NSF listings to that configuration.

Review Berkey Replacement Filters & Parts or review current Berkey filter testing and certification information .

Common Berkey Sizing Mistakes to Avoid

Before ordering, make sure you haven't:

• Chosen a system based only on household size
• Purchased more capacity than your countertop can comfortably accommodate
• Forgotten to measure vertical clearance beneath overhead cabinets
• Underestimated how often you use filtered water for cooking and beverages
• Chosen a larger system without considering how easily you can fill it
• Confused storage capacity with the number of installed filter elements

A few minutes spent measuring your kitchen and considering your actual water-use habits can help you avoid choosing a system that's either unnecessarily large or frustratingly small.

Final Recommendation: Which Berkey Size Is Best?

The best Berkey® size is the one that fits your daily routine, refill preference, and available space.

For many households, the Big Berkey® is the most balanced starting point. Its 2.25-gallon capacity provides substantially more storage than the Travel while keeping a relatively compact 8.5-inch diameter.

If you regularly use more filtered water, the Royal Berkey® is particularly compelling because it adds an entire gallon of capacity while increasing diameter by only about one inch. For much higher daily demand, move up to the Imperial or Crown if you have the necessary space.

Frequently Asked Questions About Berkey Sizes