Home Fragrance Diffuser Oil Ratio Calculator

How This Tool Works

This calculator determines the exact amounts of fragrance oil and carrier oil needed for your reed diffuser based on bottle size and desired fragrance strength. It uses standard ratios that ensure proper diffusion and longevity. The tool calculates both the fragrance oil percentage and the actual volume amounts needed, making it easy to create your own reed diffuser blends.

The calculator considers that reed diffusers work best with 20-30% fragrance oil mixed with 70-80% carrier oil. Stronger scents use higher fragrance oil percentages, while lighter scents use lower percentages. The tool provides precise measurements to help you create effective, long-lasting reed diffusers that properly diffuse fragrance throughout your space.

Understanding Reed Diffuser Ratios

• Light Scent (15-20%): Subtle fragrance, good for small rooms or sensitive noses
• Medium Scent (20-25%): Balanced fragrance, most common ratio for standard use
• Strong Scent (25-30%): Intense fragrance, good for large rooms or strong preferences
• Carrier Oil (70-85%): Base oil that carries fragrance up the reeds
• Total Volume: Sum of fragrance oil and carrier oil equals bottle capacity

Tips for Making Reed Diffusers

• Measure ingredients by volume (ml) rather than weight for accuracy
• Use a light carrier oil like sweet almond or fractionated coconut oil
• Mix fragrance oil and carrier oil thoroughly before adding reeds
• Start with 4-6 reeds and add more if you want stronger scent
• Flip reeds every few days to refresh the scent
• Place diffuser in a location with good air circulation but away from direct sunlight
• Test fragrance strength in a small batch before making larger quantities
• Store unused fragrance oil in a cool, dark place to preserve scent

FAQ

• What is the best ratio for reed diffuser oil?
  The standard ratio for reed diffusers is typically 70-80% carrier oil (like sweet almond oil or fractionated coconut oil) to 20-30% fragrance oil. For a stronger scent, use 25-30% fragrance oil. For a lighter scent, use 15-20% fragrance oil. The exact ratio depends on the strength of your fragrance oil and personal preference. Some fragrance oils are more concentrated and may need less percentage.
• What carrier oil should I use for reed diffusers?
  The best carrier oils for reed diffusers are: sweet almond oil (most common, good absorption), fractionated coconut oil (lightweight, long-lasting), safflower oil (affordable option), or dipropylene glycol (professional option, helps with diffusion). Avoid using water-based carriers as they do not work well with reed diffusers. The carrier oil should be light and able to travel up the reeds effectively.
• How much fragrance oil do I need for my bottle size?
  For a 100ml bottle with 25% fragrance oil, you need 25ml of fragrance oil and 75ml of carrier oil. For a 200ml bottle with 25% fragrance oil, you need 50ml of fragrance oil and 150ml of carrier oil. The calculator helps you determine exact amounts based on your bottle size and desired strength. Always measure by volume (ml) rather than weight for accuracy.
• How do I make my reed diffuser scent stronger?
  To make your reed diffuser scent stronger: increase the fragrance oil percentage to 25-30%, use more reeds (6-8 instead of 4-6), flip the reeds more frequently (every few days), place the diffuser in a smaller room, or use a more concentrated fragrance oil. Be careful not to exceed 30% fragrance oil as it may not diffuse properly and could damage the reeds.
• How long does a reed diffuser last?
  A reed diffuser typically lasts 4-8 weeks depending on room size, number of reeds, fragrance strength, and how often you flip the reeds. Flipping the reeds every few days helps refresh the scent. The scent will gradually fade over time. When the scent becomes weak, you can add more fragrance oil or replace the entire mixture. Larger rooms may require more frequent refills.
• Can I mix different fragrance oils in a reed diffuser?
  Yes, you can mix different fragrance oils to create custom scents. Mix the fragrance oils together first, then add to the carrier oil. Start with small test batches to ensure you like the combination. Common complementary blends include: floral with citrus, woodsy with vanilla, or fresh with herbal notes. Keep the total fragrance oil percentage at 20-30% of the total mixture.