Quick example
Replace three large eggs with medium eggs
The USDA class reference is 24 oz per dozen large eggs and 21 oz per dozen medium eggs. Three large eggs represent 6 oz at the dozen-level rate. Divide by 1.75 oz per medium egg to get about 3.43 medium eggs.
US weight classes
USDA shell-egg size reference
| Size class | Minimum net weight per dozen | Dozen weight per egg |
|---|---|---|
| Peewee | 15 oz | 1.25 oz / 35.4369 g |
| Small | 18 oz | 1.5 oz / 42.5243 g |
| Medium | 21 oz | 1.75 oz / 49.6117 g |
| Large | 24 oz | 2 oz / 56.699 g |
| Extra large | 27 oz | 2.25 oz / 63.7864 g |
| Jumbo | 30 oz | 2.5 oz / 70.8738 g |
The per-egg column divides the minimum dozen weight by 12 to create a conversion reference. It is not a guarantee that each egg in a carton weighs exactly that amount.
Handling fractions
Choose convenience or precision
Use the nearest whole egg
Fastest for forgiving dishes. Check the displayed percentage difference before deciding whether the approximation is acceptable.
Portion beaten eggs
Beat the displayed number of target-size eggs until uniform, weigh the mixture without shells, and use the calculated percentage.
Scale the entire recipe
If the egg difference is large, resizing every ingredient around a whole number of eggs may preserve the recipe's balance better.
Follow recipe guidance
Egg-sensitive custards, cakes, and emulsions may provide their own gram weight or substitution instructions.
Class weight, not contents
The reference includes the shell
USDA size classes describe shell eggs and carton-level weight. Shell thickness, yolk-to-white ratio, and individual egg weight vary, so this conversion is proportional rather than an exact edible-content measurement. If a recipe specifies grams of beaten egg, weigh the edible egg directly and use that requirement instead.
Method & sources
How the egg equivalence is calculated
The six sizes and their minimum dozen weights come from the USDA Agricultural Marketing Service's United States Standards, Grades, and Weight Classes for Shell Eggs. The calculator multiplies the recipe count by its class weight per egg, then divides by the target class weight per egg.
Ounce-to-gram display values use the official avoirdupois relationship in the NIST Guide to the SI. Gram values are references for eggs with shells, not edible liquid egg.
Common questions
Egg size converter FAQ
How many medium eggs equal three large eggs?
About 3.43 medium eggs by USDA size-class weight. Use three for convenience or proportion four beaten medium eggs when precision matters.
Does every egg in a size class weigh the same?
No. The classes use carton-level minimum weights, and individual eggs can vary.
Do the displayed weights include the shell?
Yes. They come from shell-egg classes and should not be read as exact edible egg weights.
How do I use part of an egg?
Beat enough target-size eggs together, weigh the combined edible mixture, and use the displayed percentage of that weight.