Unit Converter & Dilution Calculator

Common conversions (illustrative)

Dilution % Oil per 30 mL carrier Drops (20 drops/mL) for 30 mL Drops (30 drops/mL) for 30 mL
0.5%0.15 mL3 drops5 drops
1%0.30 mL6 drops9 drops
2%0.60 mL12 drops18 drops
3%0.90 mL18 drops27 drops
4%1.20 mL24 drops36 drops
5%1.50 mL30 drops45 drops

Tips and safety notes

  • Always start with a conservative dilution, especially for sensitive populations (0.5–1% where advised by NAHA/Tisserand guidelines).
  • Patch test new blends on clean skin before broader use.
  • Phototoxic oils (like certain citrus) may require lower dilutions; avoid sun exposure after application if using photosensitive oils.
  • For adults, 2% dilution is a common general-use guideline; adjust downward for children, the elderly, pregnancy, or compromised skin.
  • When estimating drops, remember that 20 drops/mL is a common baseline, but some references use 30 drops/mL.

Crosswalk and reference data

  • Typical drops per mL: 20 drops ≈ 1 mL (baseline used by many calculators).
  • Alternative 30 drops/mL (Tisserand-based): 30 drops ≈ 1 mL.
  • 0.5–1% for sensitive skin; 1–2.5% for normal skin (per NAHA and guidelines).
  • 2% commonly cited as safe for healthy adults in some sources (≈12 drops/oz for 30 mL carrier).
  • Higher-risk oils have upper dermal limits; always verify specific oil safety data.