This guide explains how to read a jigger, how to measure both metric and imperial units, and how to pour with accuracy using proper technique.
Understanding Measurements on a Jigger
Most professional jiggers include markings for milliliters (ml), centiliters (cl), and ounces (oz).
Metric Side (ml / cl)
Common metric markings include:
10 ml (0.33 oz)
20 ml (0.67 oz / 2⁄3 oz)
30 ml (1 oz)
40 ml (1.33 oz)
50 ml (1.67 oz)
Imperial Side (oz)
1 oz ≈ 30 ml
Typical ounce markings include:
1 oz (30 ml)
3⁄4 oz (22.5 ml)
1⁄2 oz (15 ml)
Why Bartenders Use Jiggers
Using a jigger ensures accurate cocktail balance, consistent drinks across bartenders, cost control, and professional standardization.
How to Use a Jigger Correctly
Identify the measurement, hold at eye level, pour smoothly, and switch sides efficiently.
Practical Example: Mai Tai
40 ml (1.33 oz) Dark Rum
20 ml (0.67 oz) Light Rum
15 ml (0.5 oz) Orgeat
20 ml (0.67 oz) Lime Juice
Conclusion
The jigger remains one of the most important precision tools in modern bartending.