Temp
145°F
Hold
30 min
Total
55 min
Traditional home method
30 min
10 min
15 min
55 min
As an Amazon Associate, we earn from qualifying purchases.
Inputs
Result
Batch method: 145°F for 30 min. Heat up = 1 gal × 10 min/gal = 10 min. Cool = 1 × 15 = 15 min. Total = 10 + 30 + 15 = 55 min.
Inputs
Result
Heat up = 2 × 10 = 20 min. Hold = 30 min. Cool = 2 × 15 = 30 min. Total = 20 + 30 + 30 = 80 min.
Using the batch method (most common for home use), heat milk to 145°F and hold for 30 minutes. Total time including heating and cooling is about 55–75 minutes for 1 gallon. HTST requires 161°F for only 15 seconds but needs precise temperature control equipment.
| Method | Temperature | Hold Time | Equipment |
|---|---|---|---|
| Batch/Vat | 145°F | 30 minutes | Double boiler, thermometer |
| HTST | 161°F | 15 seconds | Plate heat exchanger |
| UHT | 280°F | 2 seconds | Industrial UHT system |
Pasteurization at 145°F for 30 minutes or 161°F for 15 seconds kills pathogenic bacteria including E. coli, Salmonella, and Listeria. These time-temperature combinations are set by the FDA and provide a 5-log reduction (99.999% kill rate) of target pathogens.
Batch pasteurization (145°F/30 min) has the least impact on flavor, producing results closest to raw milk. HTST (161°F/15 sec) causes minimal change. UHT (280°F) produces a noticeable cooked flavor. The lower the temperature, the more the milk retains its original taste.
Place the pot in an ice bath (sink filled with ice water) and stir constantly. One gallon cools from 145°F to 40°F in about 15 minutes with an ice bath vs 60+ minutes at room temperature. Rapid cooling prevents bacterial regrowth and preserves quality.
Explore all our free food, baking, and brewing calculators
Last Updated: Mar 19, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.