Overrun Calculator

Overrun measures the air incorporated during churning. It affects texture, density, yield, and perceived richness.

Understanding Overrun

Overrun = percentage increase in volume from air incorporation

Overrun % = ((Churned Volume - Base Volume) / Base Volume) × 100

Overrun	Meaning
0%	No air added (impossible in practice)
25%	Dense (gelato)
50%	Moderate (premium ice cream)
100%	Light (standard commercial)
100%+	Very airy (economy products)

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Interactive Overrun Calculator

Note

Enter base weight/volume and final churned volume to calculate overrun.

CalculatePredictWeight method

Base Volume (ml)

Churned Volume (ml)

30.0% overrun

On target

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Target Overrun by Product

Product	Target Overrun	Notes
Dense gelato	20–25%	Intense, heavy
Standard gelato	25–35%	Traditional
Artisan ice cream	30–50%	Rich, creamy
Premium ice cream	40–60%	Balanced
Standard commercial	60–90%	Lighter
Economy ice cream	90–120%	Very airy
Soft-serve	30–50%	Served from machine

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Manual Calculation

Calculate Overrun

Overrun % = ((Final Volume - Starting Volume) / Starting Volume) × 100

Example:

• Base: 750ml
• Churned: 975ml
• Overrun = ((975 - 750) / 750) × 100 = 30%

Calculate Expected Yield

Expected Yield = Base Volume × (1 + Overrun% / 100)

Example:

• Base: 750ml
• Target overrun: 40%
• Yield = 750 × (1 + 40/100) = 1050ml

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Factors Affecting Overrun

Increases Overrun

Factor	Effect	Notes
Higher fat	+++	Fat stabilizes air bubbles
More emulsifiers	++	Yolks, lecithin help
Longer churn	++	More air incorporation
Stabilizers	+	Some help trap air
Warmer base	+	Easier to incorporate air

Decreases Overrun

Factor	Effect	Notes
Lower fat	---	Less air retention
No emulsifiers	—	Air escapes
Short churn	—	Less time for air
Very cold base	-	Harder to aerate
Heavy mix-ins	-	Deflate during fold

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Controlling Overrun

For Lower Overrun (Denser)

Technique	Implementation
Stop churn early	Monitor temperature
Use less fat	Gelato-style ratios
Reduce stabilizers	Minimal amounts
Pack firmly	Remove air pockets

For Higher Overrun (Lighter)

Technique	Implementation
Longer churn	Continue until very thick
Higher fat	More cream
Add emulsifiers	Extra yolks or lecithin
Proper aging	Full stabilizer hydration

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Measuring Overrun

Weight Method (Most Accurate)

1. Weigh base before churning
2. Measure churned volume using known container
3. Calculate density and compare

Base density ≈ 1.05–1.10 g/ml (ice cream base)
Churned density = Weight / Volume
Overrun = ((Base Density / Churned Density) - 1) × 100

Volume Method (Practical)

1. Mark container at base level
2. Transfer churned product
3. Measure increase in height/volume

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Overrun Quick Reference

From Base Weight to Yield

Base (g)	25% Overrun	40% Overrun	60% Overrun
500	625ml	700ml	800ml
750	940ml	1050ml	1200ml
1000	1250ml	1400ml	1600ml
1500	1875ml	2100ml	2400ml

Container Planning

Container Size	Base Needed (30% overrun)
Pint (475ml)	~365g
Quart (950ml)	~730g
1.5 quart (1.4L)	~1080g
Half gallon (1.9L)	~1460g

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Impact on Eating Quality

Overrun	Texture	Flavor Intensity	Melting
<25%	Very dense	Maximum	Slow
25–40%	Dense, rich	Strong	Moderate
40–60%	Creamy	Good	Moderate
60–80%	Light	Diluted	Fast
80%+	Fluffy	Weak	Very fast

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Troubleshooting

Problem	Cause	Solution
Overrun too low	Under-churned	Churn longer
Overrun too low	Base too cold	Start at 4°C
Overrun too low	Insufficient fat	Check formulation
Overrun too high	Over-churned	Stop earlier
Overrun too high	High fat separating	Watch for butter
Inconsistent	Variable churn time	Standardize process