Emulsion Formulation Calculator

Oil and water phase percentages with emulsifier HLB.

Batch size (g)

Oil phase (%)

Required HLB

Emulsifier (%)

High-HLB emulsifier

Low-HLB emulsifier

Tab to move between fields

Oil phase (g)

Water phase (g)

Water phase (%)70

Total emulsifier (g)5

High-HLB emulsifier (g)2.57

Low-HLB emulsifier (g)2.43

High-HLB fraction (%)51.46

Achieved blend HLB10

Oil:water ratio0.36

How to Use This Calculator

Enter the batch size and oil phase percentage for your formula.
Set the required HLB for your oil blend, then enter the HLB values of your high-HLB and low-HLB emulsifiers.
Input the total emulsifier usage level as a percentage of the batch.
Review the emulsifier split between the high- and low-HLB components, the achieved blend HLB, and the resulting water phase and oil:water ratio.
Use these ratios as starting points for bench-scale trials.

How the result changes with Batch size (g)

Batch size (g): Total weight of the emulsion batch in grams.
Oil phase (%): Oil phase as a percentage of total batch. Typical range 15-40% for lotions, 40-70% for creams.
Required HLB: Target HLB for your oil phase. Mineral oil ~10-12, beeswax ~9, coconut oil ~8, stearic acid ~15.
Emulsifier (%): Total emulsifier as a percentage of batch. Typically 3-8% for stable emulsions.
High-HLB emulsifier: HLB value of your hydrophilic emulsifier (e.g., Polysorbate 60 = 14.9, Polysorbate 80 = 15).
Low-HLB emulsifier: HLB value of your lipophilic emulsifier (e.g., Span 60 = 4.7, Span 80 = 4.3).

Oil phase (g): Weight of oil phase ingredients.
Water phase (g): Weight of water phase (balance after oil + emulsifier).
Water phase (%): Water phase as percentage of total batch.
Total emulsifier (g): Total weight of emulsifier blend.
High-HLB emulsifier (g): Grams of the hydrophilic emulsifier needed.
Low-HLB emulsifier (g): Grams of the lipophilic emulsifier needed.
High-HLB fraction (%): Percentage of emulsifier blend that is the high-HLB component.
Achieved blend HLB: Actual HLB of your emulsifier blend (should match required HLB).
Oil:water ratio: Oil to water weight ratio for the emulsion.

Identify Input Parameters
4 parameters
Batch size (g) = 100, Oil phase (%) = 25, Required HLB = 10, Emulsifier (%) = 5 = 6 input(s) provided
Calculate Oil phase
Oil phase = batchSize * (oilPhasePct / 100)
25 = 25
Calculate Water phase
Water phase = Math
70 = 70
Calculate Water phase
Water phase = Math
70 = 70
Calculate Total emulsifier
Total emulsifier = batchSize * (emulsifierPct / 100)
5 = 5