How many medium eggs equal one large egg?

One large egg weighs approximately 63g and a medium egg about 53g, so you need roughly 1.2 medium eggs per large egg. For 3 large eggs (189g), use 4 medium eggs (212g) — the slight excess is usually fine in most recipes.

Does egg size really matter in baking?

Yes, especially in recipes that rely on eggs for structure like sponge cakes, choux pastry, and meringues. A difference of 1-2 eggs worth of weight can significantly affect texture and rise. For recipes with 1-2 eggs it matters less.

What size eggs do most UK recipes use?

Most UK recipes assume large eggs (63g). If a recipe does not specify, use large eggs. American recipes also typically use large eggs, though US large is slightly lighter at about 57g.

Can I weigh eggs instead of counting them?

Absolutely. Weighing is the most accurate method. Crack the eggs into a bowl, weigh the liquid, and match the total weight the recipe needs. This is especially useful when substituting sizes results in an awkward fraction.

BakeCalcs

Egg Size Substitution Calculator

Substitute different egg sizes in recipes. Find out how many eggs you need when using a different size.

Recipe Egg Size

Size the recipe calls for

Recipe Quantity

How many eggs the recipe needs

Available Egg Size

Size you have available

How We Calculate This

This calculator converts egg quantities between sizes using weight. Each UK egg size has a standard average weight (in shell):

Small: 48g
Medium: 53g
Large: 63g
Very Large: 73g

The calculation

Total recipe weight = recipe egg weight × quantity. Divide by the available egg weight to get the number needed. The volume comparison assumes egg liquid is about 88% of shell weight.

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Last updated: March 2026

All calculations are based on standard ratios and conversions. Results may vary with specific ingredients, equipment, and conditions.