How It Works
This calculator works in 4 steps.
Enter the carrier volume
Type the carrier oil or base volume in mL or fl oz.
Enter the chosen percent
Type the dilution percent selected from a qualified source.
Set the drops per mL
Keep 20 drops/mL or type a measured value for the dropper.
Read the oil amount
The calculator returns essential oil in mL and estimated drops.
The Formula
The formula multiplies the carrier volume by the chosen percent and converts mL to drops.
V_oil = V_carrier × % / 100drops = V_oil × dd = 20 drops/mL- V_carrier:
- Carrier volume
- %:
- Chosen dilution percent
- d:
- Drops per mL for the dropper
A 1% dilution in 30 mL (1 fl oz) of carrier needs 0.3 mL of essential oil, about 6 drops at 20 drops/mL.
Conversion Table
The conversion table gives oil amounts for 30 mL of carrier at 5 percent levels, at 20 drops/mL.
| Percent | Carrier | Oil (mL) | Oil (drops) | Oil per 10 mL carrier |
|---|---|---|---|---|
| 0.5% | 30 mL (1 fl oz) | 0.15 mL | 3 drops | 0.05 mL |
| 1% | 30 mL (1 fl oz) | 0.3 mL | 6 drops | 0.1 mL |
| 2% | 30 mL (1 fl oz) | 0.6 mL | 12 drops | 0.2 mL |
| 3% | 30 mL (1 fl oz) | 0.9 mL | 18 drops | 0.3 mL |
| 5% | 30 mL (1 fl oz) | 1.5 mL | 30 drops | 0.5 mL |
Drop counts are estimates. Measure by volume or weight for repeatable batches.
What Is the Essential Oil Dilution Calculator?
The Essential Oil Dilution Calculator is a tool that returns the amount of essential oil to add to a carrier oil or base for an explicitly selected percent dilution. The user chooses the percent; the calculator converts it into mL and an estimated drop count.
Drop size varies with the dropper, the oil's viscosity, and temperature, so drop counts are estimates. The calculator uses 20 drops per mL as the default and lets the user enter a measured value. The appropriate percent depends on the oil, the use, and the person, and comes from a qualified source such as a product label or an aromatherapy professional.
Common Uses
There are 5 main uses of this calculator.
Blend making
Users prepare roller bottles and massage oils at a chosen percent.
Product formulation
Small makers record fragrance load in lotions.
Batch scaling
Makers scale a 30 mL recipe to 500 mL.
Candle and soap making
Crafters compute fragrance oil per batch weight.
Recipe conversion
Users convert drop-based recipes into mL.