How Much Laundry Detergent to Use—and How to Tell if You're Using Too Much

When aiming to remove stains, odors, or stiffness from your clothes, it's important to use the right amount of laundry detergent. The correct dosage ensures your laundry is clean and fresh without damaging the fabric. But how can you tell if you're using too much or too little detergent?

Here, laundry specialists offer advice on how much detergent to use for various types of laundry loads, plus how to spot signs of underuse or overuse. By adjusting your detergent use appropriately, you'll achieve cleaner laundry and save money in the process.

How Much Laundry Detergent Should You Use?

For an average-sized, moderately soiled load, a good guideline is to use ½ ounce of detergent for high-efficiency (HE) machines and 1 ounce for traditional machines, according to Cleancult's Ryan Lupberger. However, the exact detergent amount depends on several factors, including:

• Detergent type
• Load size
• Soil level of clothes
• Water hardness in your area
• Washing machine type

Detergent Type

Lupberger points out that many people use the detergent cap to measure the appropriate amount for a load. However, not all liquid detergent caps come with clear measurements, and even those that do might not be accurate. He suggests using a measuring cup to ensure you’re adding the correct amount of detergent for each load.

If you’re using a pre-measured detergent pod or pack, these are generally designed for standard laundry loads. Simply use one per load and follow the instructions on the label. If the provided amount isn’t giving you the desired results, consider adjusting based on the following factors.

Load Size and Soil Level

The challenge arises because we don’t always deal with an average-sized load. According to cleaning expert Mary Gagliardi, it's essential to adjust detergent and laundry additives based on both the size of the load and the level of dirt. As she explains, "Large loads of heavily soiled laundry require more detergent," whereas "a small load with lightly soiled items only needs the minimum amount specified on the product label."

Water Hardness: Hard or Soft?

Water quality and hardness are important factors in determining the correct amount of detergent. As Gagliardi explains, “High water hardness reduces cleaning performance,” which means that individuals with hard water should use more detergent to compensate. However, if you have soft water, don’t assume you can use less detergent—most products are formulated with soft water in mind.

Washing Machine Type

It’s important to remember that traditional top-load washers typically use more water than front-load machines, so they may require a bit more detergent. However, it’s still recommended to follow both the detergent label’s instructions and your washing machine’s manufacturer guide for the best results.

Users of low-volume HE washers often face foaming issues, which generally prevents them from overusing detergent, according to Gagliardi. “If anything, they tend to use too little,” she notes. Since HE washers use less water, using too little detergent can result in poor distribution, while too much may rinse away. It's important to use enough detergent to ensure your clothes are properly cleaned.

Signs of Using Too Little or Too Much Detergent

Signs of using too little detergent include clothes that feel dirty, greasy, or smelly. If your laundry isn't coming out as clean as it should, try increasing the amount of detergent for the next similar load.

On the other hand, using too much detergent can cause clothes to feel stiff, scratchy, or sticky. Faded colors and frayed fabrics are additional warning signs. It’s not just the laundry that gives away overuse—residual detergent on clothing or detergent that becomes clumpy and doesn’t rinse out properly also indicates you're using too much.

The Cost of Overusing Detergent

“It’s always wise to avoid waste—and that applies to laundry products as well,” says Gagliardi. Using too much detergent is not only wasteful but also costly, forcing you to buy replacement detergent more often. This behavior can add up, straining your budget in the long run.

Overusing detergent can also cause damage to your washing machine, according to Lupberger. Excess detergent can build up and clog hoses, valves, and other components, hindering proper water drainage and potentially leading to costly repairs. No one wants the inconvenience of unexpected machine breakdowns.

How to Remove Detergent Buildup

If you think you’ve been overusing detergent and want to clean up your laundry routine, here are some tips to remove detergent residue from both your clothes and washing machine:

• Ensure detergent is completely removed by adding an extra rinse cycle. This helps your clothes stay free from residue, prolong their lifespan, maintain freshness, and protect your skin.
• Consider trying laundry stripping—soak your garments and linens in hot water with a borax solution to eliminate detergent, fabric softener, hard water minerals, and oils that may have accumulated over time.
• Clean your washing machine regularly. Use a commercial washing machine cleaner after each wash and perform a deep clean once a month to remove hard water minerals, detergent buildup, bacteria, and mold.
• If hard water is causing mineral buildup on your clothes and washing machine, you may want to explore installing a household water softener as a solution.

Frequently Asked Questions

• How can I tell if I'm using too much detergent?

  If your clothes feel rough, stiff, or still have detergent residue after washing, you're probably using too much detergent.

• Can using too much detergent damage my washing machine?

  Yes! Overuse of detergent can clog hoses and valves, leading to significant drainage problems.

• How much laundry detergent should I use?

  Experts recommend using ½ ounce of detergent for high-efficiency (HE) machines and 1 ounce for traditional machines. However, the amount may vary depending on load size, soil level, and machine type.