BakeCalcs.uk
Egg Size Converter
Convert recipes between small, medium, large, and very large UK eggs by weight.
The egg size the recipe was written for. If unspecified, UK recipes assume Large (63-73g).
Number of eggs in the recipe
The egg size you actually have on hand. We rescale by weight to match the recipe.
Average small egg weight (default 48g)
Average medium egg weight (default 58g)
Average large egg weight (default 68g)
Average very large egg weight (default 78g)
How We Calculate This
This converter calculates the total weight of eggs called for in the recipe, then divides by the average weight of the target egg size to determine how many you need.
The Formula
- Total egg weight = Number of eggs x Weight per egg (original size)
- Converted quantity = Total weight / Weight per egg (target size)
UK Egg Weights
- Small: ~48g (28.5g white, 12.6g yolk)
- Medium: ~58g (35.3g white, 14.8g yolk)
- Large: ~68g (42g white, 17.1g yolk)
- Very Large: ~78g (49.4g white, 19g yolk)
Frequently Asked Questions
UK egg sizes are: Small (under 53g, average ~48g), Medium (53-63g, average ~58g), Large (63-73g, average ~68g), and Very Large (73g+, average ~78g). These weights include the shell, which accounts for about 10% of total weight.
Most UK recipes are written for large eggs (63-73g) unless otherwise stated. If a recipe just says "eggs" without specifying a size, assume large. American recipes typically use "large" eggs which are slightly smaller than UK large.
Beat the egg thoroughly, then weigh it and use the required fraction by weight. For example, if you need 1.5 medium eggs (about 87g total), beat 2 eggs and weigh out 87g. The remaining beaten egg can be used as an egg wash.
Yes, especially in recipes where eggs provide the main structure or moisture — such as cakes, meringues, and custards. Using the wrong size can mean too much or too little moisture, affecting the texture significantly. For something like a crumble topping, it matters less.
No. US Large eggs weigh about 57g in shell (~50g without shell), which is close to UK Medium. US Extra Large is closer to UK Large. Always check whether a recipe uses UK or US measurements before converting.
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Last updated: February 2026
All calculations are based on standard ratios and conversions. Results may vary with specific ingredients, equipment, and conditions.