How to Upcycle Used Coffee Grounds into DIY Cat Litter

How to Upcycle Used Coffee Grounds into DIY Cat Litter

Having cats as pets can be very rewarding, but it also comes with certain responsibilities, like managing your cat’s litter box. Buying cat litter can get expensive over time. As an eco-friendly alternative, you can actually upcycle used coffee grounds into homemade cat litter. This simple DIY cat litter made from a recycled material benefits the environment and saves you money.

Gathering the Used Coffee Grounds

The first step is collecting a sufficient amount of used coffee grounds. Here are some tips:

  • Ask your local coffee shop if they can set aside their used grounds for you. Many coffee shops are happy to do this to divert waste from the landfill.

  • Save the grounds from your own morning coffee. Rinse them out gently to remove excess oils before drying and storing.

  • Grounds from espresso or dark roasts are ideal since they are coarser. Finer grounds like those from drip coffee can work too.

  • Aim for about 2 cups of used grounds per day if you have 1 cat. Adjust amounts based on the number of cats and litter boxes you have.

  • Store the collected grounds in sealable bags or containers until ready to use.

Preparing the Cat Litter Mixture

Once you have enough used coffee grounds, you can prepare the homemade cat litter. Here is the process:


  • 2 cups used coffee grounds
  • 1 cup baking soda
  • 1/2 cup cornmeal or rice flour (optional)


  1. Mix together the used coffee grounds and baking soda in a large bowl or container.

  2. Add the cornmeal or rice flour if you want to help absorb odors.

  3. Stir thoroughly until fully blended.

  4. Your DIY cat litter is now ready to use!

The baking soda helps absorb odors, while the grounds provide excellent clumping ability. The additional flour absorbs moisture to keep the litter drier.

Using the Upcycled Cat Litter

Maintaining your cat’s litter box using this homemade litter is simple:

  • Scoop out waste and wet clumps daily as usual.

  • Add more litter to replace what was removed.

  • Fully replace the litter about once per week.

  • Consider placing baking soda boxes in the litter box area to help absorb odors.

  • Wash litter boxes with soap and water monthly or as needed.

  • Compost or discard clumped litter waste. Do not flush down toilet.

The used grounds provide great clumping ability to make scooping easy. The baking soda and optional cornmeal help control odors in between full litter changes.

Benefits of Upcycled Cat Litter

Converting spent coffee grounds into cat litter offers many advantages:

  • Reduces waste by giving used grounds a second life.

  • Saves money since it’s free to collect the grounds.

  • Good clumping ability makes scooping litter easy.

  • Helps control odors with natural absorbing ingredients.

  • Eco-friendly and sustainable compared to clay or chemical litters.

  • Safe for cats and does not contain silica dust.

By upcycling used coffee grounds instead of buying new cat litter, you keep waste out of landfills and save money. It’s a green, eco-friendly solution that benefits both the environment and your wallet!

Final Tips

  • Use sealable containers to store the collected used grounds.

  • Experiment with the ingredient ratios to optimize odor control and clumping.

  • Allow freshly made litter to sit 24 hours before use so smells can dissipate.

  • Add some rice flour or cornmeal if litter seems too damp.

With a simple DIY approach, you can turn spent coffee grounds into an effective cat litter. Upcycling this waste material is environmentally friendly, saves money, and provides a safe, natural litter option for your feline friend.