Calculators
Compare Two Essential Oils: Compounds, ISO, EU Allergen
Puts two essential oil pages side by side: compounds named in both, each value with its source, ISO standard and EU allergen entry. No ranking.
Side by side
Two studies may not measure the same oil the same way: plant part, process, sample and analytical method may differ. Each value keeps the heading of its table, the label of its column (method, unit), its source and its fact identifier; the linked page gives the plant part and process its source reports. The gap only orders the rows, and only when each oil has a single % value for the compound; it does not rank the oils.
Which pages can be compared?
76 pages published in English and French carry a species identification block; those with a sourced composition table give their number of compounds.
- Agarwood (Aquilaria malaccensis): Wood, Oils and CITES
- Amyris balsamifera (Rutaceae): oil of amyris
- Angelica archangelica: root and seed essential oils — 15 compound(s)
- Anise (Pimpinella anisum): fruit and seed oils, ISO 3475 — 50 compound(s)
- Atlas cedar (Cedrus atlantica) wood oil: yield, compounds — 14 compound(s)
- Black pepper (Piper nigrum L.): seed oil and ISO 3061 — 3 compound(s)
- Blue Tansy (Vogtia annua): oil from one Moroccan study — 39 compound(s)
- Cananga odorata: Complete grade ylang ylang oil
- Canarium luzonicum: botany and ISO 10624 standard
- Cardamom (Elettaria cardamomum): Oil Composition, ISO 4733 — 29 compound(s)
- Cassie (Vachellia farnesiana): essential oil and absolute
- Cedarwood (Juniperus virginiana) oil: ISO 4724, EU entry 358 — 4 compound(s)
- Celery (Apium graveolens): seed oil, yields, ISO 3760
- Ceylon cinnamon (Cinnamomum verum): bark oil composition — 25 compound(s)
- Chamaemelum nobile (L.) All., roman chamomile oil: ISO 24600
- Cinnamon leaf oil (Cinnamomum verum): composition, ISO 3524 — 154 compound(s)
- Cistus - Cistus ladanifer L.
- Citrus × aurantiifolia (lime) oil: ISO 3809, ISO 3519
- Citrus × bergamia (bergamot): identity, ISO 3520
- Citrus × paradisi (grapefruit): identity, ISO 3053
- Citrus × sinensis (sweet orange): identity, ISO 3140
- Citrus reticulata Blanco: cold-pressed oil and ISO 3528 — 3 compound(s)
- Clove Bud Oil (Syzygium aromaticum): Eugenol, ISO 3142
- Coriandrum sativum L. (coriander): identity, ISO 3516
- Corymbia citriodora essential oil: two studies, ISO 3044
- Cuminum cyminum L. (cumin): identity, ISO 9301
- Cupressus sempervirens L. (cypress): identity, ISO 20809
- Cymbopogon citratus (lemongrass): identity, ISO 3217
- Cymbopogon nardus (L.) Rendle (citronella) oil: identity
- Eucalyptus globulus oil: 1,8-cineole, ISO 770, EU entry 355 — 68 compound(s)
- Fennel (Foeniculum vulgare): botanical name, fruit oil — 15 compound(s)
- Galbanum - Ferula galbaniflua
- Geranium oil and the genus Pelargonium: ISO 4731:2012
- German chamomile (Matricaria chamomilla L.): oils, ISO 19332 — 39 compound(s)
- Ginger (Zingiber officinale): botanical name, rhizome oil — 65 compound(s)
- Helichrysum italicum (immortelle): Italian, Adriatic oils
- Jasmine (Jasminum grandiflorum): flower oil, IFRA absolute — 16 compound(s)
- Juniper (Juniperus communis L.): berry oil and cone oil — 148 compound(s)
- Kaffir lime, Combava, Citrus hystrix DC.: leaf, pericarp oil — 25 compound(s)
- Laurus nobilis L.: identity, EU allergen entry 359
- Lavandin (Lavandula × intermedia) oil: Grosso, ISO, EU 360 — 55 compound(s)
- Lavandula latifolia Medik. (spike lavender) oil: ISO 4719
- Lemongrass oil and the genus Cymbopogon: ISO 3217, ISO 4718
- Litsea cubeba (Lour.) Pers.: identity, ISO 3214
- Mentha × piperita L.: oil composition, Morocco, ISO 856 — 5 compound(s)
- Mentha arvensis L. essential oil: constituents and yield — 18 compound(s)
- Mugwort (Artemisia vulgaris): botanical name and leaf oils — 61 compound(s)
- Myrrh (Commiphora myrrha): Species and Botanical Identity
- Neroli oil (Citrus × aurantium L.): composition, ISO 3517 — 31 compound(s)
- Nutmeg (Myristica fragrans Houtt.): seed oil and ISO 3215 — 46 compound(s)
- Oregano (Origanum vulgare): drying, oil yield, carvacrol — 11 compound(s)
- Palmarosa (Cymbopogon martini): name, oil, ISO 4727 — 7 compound(s)
- Patchouli (Pogostemon cablin): oil yield and compounds — 21 compound(s)
- Pelargonium graveolens L'Hér.: identity, EU allergen 364
- Pelargonium L'Hér. ex Aiton — essential oil of geranium
- Rosa × centifolia L.: identity, EU allergen entry 366
- Rose oil (Rosa × damascena): composition and yields — 57 compound(s)
- Rosemary oil (Salvia rosmarinus): Ph. Eur. and ISO 1342
- Rosemary oil, camphor chemotype
- Rosemary oil, verbenone chemotype
- Rosewood (Aniba rosodora): name, CITES, leaf and twig oil — 16 compound(s)
- Salvia sclarea L. (clary sage) essential oil: ISO 24255
- Sandalwood (Santalum album) oils: santalols, ISO 3518, CITES
- Santalum spicatum: Australian sandalwood tree
- Spearmint oil (Mentha spicata L.): composition, standards — 12 compound(s)
- Star anise (Illicium verum Hook.f.): fruit and pericarp oils
- Styrax (Liquidambar orientalis): composition, oil, IFRA — 27 compound(s)
- Sweet basil
- Tarragon (Artemisia dracunculus): oil and ISO 10115 — 8 compound(s)
- Tea Tree - Melaleuca alternifolia
- Thyme oil, thymol type
- Thymus vulgaris ‘linalool’ grown three years in Tuscany
- Tuberose (Polianthes tuberosa): absolutes, oil and hydrosol — 55 compound(s)
- Turmeric (Curcuma longa L.): rhizome oil, yield and ISO — 22 compound(s)
- Vetiver, Chrysopogon zizanioides: scientific name, root oil — 21 compound(s)
- Ylang-ylang (Cananga odorata): flower oil, yield, compounds — 197 compound(s)
Puts two pages of the site side by side, using only what those pages already give with a source.
What it shows
- the ISO standard and the EU Annex III allergen entry that each page names in its identification block
- the compounds that both pages name in a composition table, under the same name
- for each value: the heading of its table, its column, its source and its fact identifier
What it does not do
It does not rank oils and says nothing about use. It does not match two names of the same compound written differently, and it does not convert values: two studies may not measure the same oil the same way.
The other tools
Each one computes from the quantities you enter.
- 🎭 Essential Oil Blend Ratio Calculator: Top, Middle, Base Splits a total number of drops into top, middle and base notes at the proportions you set, to one decimal. It proposes no oils and no pairings.
- 🧪 Essential Oil Dilution Calculator: Percent to Drops Turns a volume and a percentage into drops and millilitres of essential oil, at the drops-per-millilitre rate you set. It proposes no percentage.
- ⚖️ Essential Oil Drops to ml, tsp and fl oz Converter Converts essential oil volumes between drops, millilitres, teaspoons, tablespoons and fluid ounces, at the drops-per-ml rate you set. No grams.
- ⚗️ Extraction Yield Calculator: Oil Mass as a Percentage Divides the mass of oil obtained by the mass of plant material charged: yield in percent, grams per kilogram, kilograms of material per kilogram of oil.