The general rule: 3-5 drops of essential oil per 500 ml (about 2 cups) of sauna water. That covers mild oils like lavender, pine, spruce, and cedarwood. Stronger oils - eucalyptus, peppermint, tea tree, and the rich florals - need only 2-3 drops, and the two most intense, camphor and oregano, just 1-2. One rule has no exceptions: never pour undiluted essential oil onto hot stones. The oil always goes into the water first.

Below you will find the exact dosage table for all 16 of our sauna oils, why more oil actually makes the steam worse, and how to mix so every ladleful stays even. For the bigger picture of scenting a sauna, start with our complete guide to sauna scents.

Quick answer: how many drops of which oil?

• Mild oils - lavender, pine, spruce, cedarwood: 3-5 drops per 500 ml
• Citrus oils - bergamot, lemon: 3-4 drops
• Stronger oils - eucalyptus, peppermint, tea tree, jasmine, rose, neroli, clary sage, patchouli: 2-3 drops
• Very intense oils - camphor, oregano: 1-2 drops

Using a bigger bucket? Scale the drops in the same ratio: a full litre of water takes 6-10 drops of a mild oil. When in doubt, pick the lower number. You can always add scent with the next ladle, but you cannot take an overdosed steam room back.

The dosage table: all 16 sauna oils

Oil	Drops per 500 ml	Character
Lavender	3-5	Mild and floral, the classic for a calm evening sauna
Pine	3-5	Resinous and woodsy, the traditional Nordic sauna scent
Spruce	3-5	Fresh needle aroma, like a walk through a winter forest
Cedarwood	3-5	Warm and woody, soft and grounding
Bergamot	3-4	Bright citrus with a light floral undertone
Lemon	3-4	Clean, sparkling citrus
Jasmine	2-3	Rich floral, fills the room with just a couple of drops
Rose	2-3	Deep, concentrated floral aroma
Neroli	2-3	Delicate orange blossom, stronger than you would expect
Clary sage	2-3	Herbal and warm, with a depth all of its own
Patchouli	2-3	Heavy and earthy, very long-lasting
Eucalyptus	2-3	Piercing and fresh, a big favourite among sauna regulars
Peppermint	2-3	Cool and sharp, hits especially hard in hot steam
Tea tree	2-3	Pungent and herbal, instantly recognizable
Camphor	1-2	Very intense and sharp, dose sparingly
Oregano	1-2	Spicy and powerful, one drop is often enough

In a small, very hot sauna, stay at the lower end of each range; in a large room with moderate heat, move toward the upper end.

Why not more?

More oil does not make better steam. Hot stones vaporize the oil instantly, and the rising heat carries the aroma straight into your airways and eyes. An overdosed throw is harsh: eyes sting, the throat scratches, and a scent you normally love turns suffocating. It happens fastest with eucalyptus, peppermint, camphor, and oregano - the very oils that feel wonderful at the right dose.

A small dose, on the other hand, opens cleanly in the steam and leaves room for the next rounds. Our rule of thumb is simple: a good scented sauna is one you notice, not one that pushes itself on you. If the first throw feels too subtle, add a single drop to the next batch - that is how you find your level without stinging eyes.

How to mix oil into sauna water

Essential oil does not dissolve in water - the drops float on the surface. Skip the stirring and one ladle can pick up all the oil at once and dump it onto the stones, where it scorches and ruins the session. Do it this way:

• Drip the oil into the bucket of water, not into the ladle and never onto the stones.
• Stir the water right before every single ladle - the oil rises back to the surface within minutes.
• A jug or bottle with a lid can be shaken well before pouring, which spreads the oil more evenly.
• Throw the water in a wide arc across the stones rather than onto one spot.
• Prefer glass, wood, or stainless steel for the bucket - plastic tends to hold onto oil smells.

Beginner tips

• Start with one oil at a time. You learn the character of each aroma and later know what blends well with what.
• Pick a classic first. Forest scents suit almost every sauna - try pine essential oil or fresh spruce essential oil.
• For an evening sauna, go softer. Three drops of lavender essential oil make a calm, warm steam.
• Want the classic sauna punch? Two drops of eucalyptus essential oil are plenty to start with.
• Remember that heat amplifies. An oil that seems shy at room temperature is several times stronger in hot steam.

You will find all 16 oils in our sauna oil collection.

Safety first

• Never put undiluted oil on the stones. Pure essential oil is flammable and produces sharp, irritating fumes.
• Use only genuine essential oils in sauna water. Synthetic fragrance oils are made for candles and soap, not for steam - we explain the difference in can fragrance oils go in saunas.
• Never swallow essential oil or add it to drinking water - it is for aroma only.
• Children in the sauna: halve the dose or skip the oil when small children join.
• Pets are far more sensitive to aromas than people - keep them away from the sauna during a scented session.
• Skin contact: if undiluted oil gets on your skin, rinse right away with plenty of water.
• Store the bottles somewhere cool, dark, and out of children's reach - not inside the hot room.

And to be clear about where we stand: we do not give health advice. Essential oils in the sauna are about scent and atmosphere for us - for health questions, consult a specialist.

FAQ: essential oil dosage for sauna

Q: Can I drip essential oil straight onto the stones?
A: No, never. Undiluted oil ignites easily on hot stones, burns with an acrid smell, and turns the steam irritating. Diluted in the sauna water, it vaporizes evenly and smells clean.

Q: Can I mix several oils together?
A: Yes, as long as the total drop count stays within the range of the strongest oil in the blend. A good starter blend is 2 drops of pine plus 1 drop of eucalyptus per 500 ml. Conifer oils blend with almost anything; citrus and lavender are another safe pair.

Q: How many ladles do I get from one batch?
A: One 500 ml batch typically lasts 3-5 throws - about one full session. Stir before every ladle, and mix a fresh batch next time; the aroma goes flat in standing water.

Q: Does the dosage change in an infrared sauna?
A: There is nothing to dose - an infrared sauna has no stones and no water to throw. If you want aroma with your infrared sessions, you need a different method entirely; we cover the options in essential oils in infrared saunas.

That is the whole answer: start at 3 drops for a mild oil, 2 for a strong one, 1 for camphor or oregano, and always stir before you throw. The rest is taste and practice. Enjoy the steam!