How big is an ostrich egg? The answer surprises most people. These giant eggs are the largest eggs laid by any living bird — averaging 15 cm (6 inches) long, 13 cm (5 inches) wide, and weighing between 1.2 and 1.8 kilograms (2.6 to 4 pounds).
Because of their size, the world’s largest bird eggs attract a lot of attention from people who see them for the first time. Many are surprised to learn that one egg can contain the equivalent of more than 20 chicken eggs.
These massive eggs play an important role in the life cycle of ostriches and are also one of the reasons ostriches are raised in farming operations around the world.
Quick Answer
An ostrich egg typically weighs 1.2–1.8 kg (2.6–4 lb) and measures about 15 cm (6 inches) long. It is the largest egg produced by any living bird and is roughly equal to 20–24 chicken eggs in volume.
Table of Contents
Ostrich Egg Size and Weight
The size of this remarkable egg can vary slightly depending on the age and health of the female ostrich. Diet and environmental conditions can also influence egg size.
Most eggs fall within a fairly consistent range.
| Measurement | Average Size |
|---|---|
| Weight | 1.2–1.8 kg (2.6–4 lb) |
| Length | about 15 cm (6 in) |
| Diameter | 12–13 cm (around 5 in) |
Even though the eggs are the largest bird eggs in the world, they are actually small compared to the size of the bird. An adult ostrich can weigh more than 100 kilograms (220 pounds), making the egg relatively modest in proportion.
If you want to learn more about the size of these birds, see how large the largest birds on Earth can grow.
Ostrich Egg vs Chicken Egg
To understand how big an ostrich egg really is, comparing it directly to a chicken egg puts the scale into perspective.
A typical chicken egg weighs about 50 grams. In contrast, an ostrich egg can weigh up to 1,800 grams.
This means a single of this giant egg is roughly equivalent to 20 to 24 chicken eggs.
Because of this difference, cooking with these giant eggs requires different techniques and much longer cooking times.
For example, boiling an ostrich egg can take about 45 to 90 minutes, depending on how firm you want the egg to be.
| Feature | Ostrich Egg | Chicken Egg |
| Weight | 1,500 g | 50 g |
| Protein Content | Equivalent to 24 eggs | 1 egg |
| Boiling Time | 90 minutes | 6 minutes |
| Shell Strength | Can support an adult’s weight | Fragile |
| Bird | Egg Weight | Egg Length | Eggs per Year |
|---|---|---|---|
| Ostrich | 1.2–1.8 kg | 15 cm | 40–100 |
| Emu | 450–650 g | 13 cm | 20–50 |
| Cassowary | 300–600 g | 14 cm | 3–8 |
| Turkey | 80–90 g | 6.5 cm | 100–150 |
| Chicken | 50–70 g | 5.5 cm | 250–300 |
| Hummingbird | 0.5 g | 1.3 cm | 2–3 |
For perspective, one ostrich egg equals approximately 4,700 hummingbird eggs in volume.
How Thick Is an Ostrich Eggshell?
The size of an this remarkable egg isn’t just impressive from the outside. Another interesting feature of ostrich eggs is their incredibly strong shell.
The shell thickness is usually around 2 to 4 millimeters, which is much thicker than the shell of most bird eggs.
This thick shell serves an important purpose. Ostrich nests are located directly on the ground, often in open areas of the savanna. The eggs must withstand the weight of adult birds and the harsh conditions of the environment.
Because of their strength, empty ostrich eggshells are often used in decorative carving and crafts.
“The shell of an ostrich egg is not just thick; it is a structural marvel. With a thickness of up to 4 mm, it is designed to support the weight of a 100 kg parent bird sitting on it. In fact, it requires a hammer or a small saw to open a fresh egg without shattering it!”
Why Ostrich Eggs Are So Large?
So why is an ostrich egg so big in the first place? The large size of these eggs helps support the development of a relatively large chick.
When ostrich chicks hatch, they are already much bigger than the chicks of most other bird species. A newly hatched ostrich chick can weigh around 1 kilogram (2 pounds).
The large egg contains enough nutrients to sustain the chick during its development inside the shell.
This remarkable eggs also take longer to hatch than many other bird eggs.
How Long Does It Take an Ostrich Egg to Hatch?
Ostrich eggs typically take about 42 days to hatch. In the wild, fewer than 10% of ostrich nests survive the full 9-week period of laying and incubation. Predators including Egyptian vultures, jackals, and hyenas actively target unguarded nests.
In farming environments, artificial incubation is commonly used to improve hatch rates. Eggs are kept at 36.4°C (97.5°F) with humidity levels around 25–35%
Both the male and female ostrich participate in incubation. The female usually sits on the nest during the day, while the male takes over at night.
This shared responsibility helps protect the eggs from predators and keeps them at the correct temperature during development.
In the wild, several females may lay eggs in the same nest. This creates a communal nest that can contain dozens of eggs.
If you are curious about egg production in general, you can also learn how many eggs an ostrich lays each year.
What Is the Largest Ostrich Egg Ever Recorded?
The world record for the largest ostrich egg belongs to an egg laid at a farm in Borlänge, Sweden, on May 17, 2008. It weighed an extraordinary 2.589 kg (5 lb 11.36 oz), far exceeding the typical average of 1.4 kg.
The average ostrich egg weighs around 1.4 kg (3.1 lb) according to Wikipedia, though eggs in the 1.2–1.8 kg range are most commonly recorded on farms.
This variability depends on the age and health of the female, her diet, and environmental conditions.
Are Ostrich Eggs the Largest Eggs Ever?
The ostrich produces the largest eggs of any living bird — but not the largest eggs that have ever existed.
Some extinct species produced even bigger ones. The elephant bird of Madagascar, for example, laid eggs far exceeding anything seen today. However, among animals currently alive, the ostrich still holds the record.
Surprising Fact: Here lies a paradox. While it is the largest egg in the modern world, it is simultaneously the smallest egg relative to the mother’s body size among all birds. A kiwi’s egg accounts for roughly 20% of its body weight but the ostrich equivalent is just 1.5%.”
Ostrich Eggs in Farming and Food
Ostrich eggs are not only important for reproduction. They also have economic value.
In ostrich farming, eggs may be used for:
- breeding new chicks
- food products
- decorative crafts
- tourism displays
Because of their size, a single egg can feed several people. Some restaurants even serve dishes made from these eggs as a novelty.
In farming operations, egg production is carefully managed to support breeding programs and healthy chick development.
Nutritional Value of an Ostrich Egg
One whole ostrich egg contains approximately:
| Nutrient | Ostrich Egg (whole) | Chicken Egg (single) |
|---|---|---|
| Calories | ~2,000 kcal | ~70 kcal |
| Protein | ~180 g | ~6 g |
| Fat | ~130 g | ~5 g |
| Cholesterol | ~2,600 mg | ~186 mg |
Because of its calorie and protein content, a single of this giant can comfortably feed 8 to 10 people.
How Much Does an Ostrich Egg Cost?
Ostrich egg prices vary depending on purpose:
| Type | Price Range |
|---|---|
| Edible ostrich egg | $20–$50 |
| Fertile egg (for hatching) | $50–$100 |
| Empty decorative shell | $10–$30 |
Prices vary by region, farm, and season. Fertile eggs command a premium due to their role in breeding programs.
FAQ
How big is an ostrich egg compared to a chicken egg?
An ostrich egg is roughly 20 to 24 times larger than a chicken egg and can weigh up to 1.8 kilograms.
How much does an ostrich egg weigh?
Most ostrich eggs weigh between 1.2 and 1.8 kilograms (2.6 to 4 pounds).
How long does it take to boil an ostrich egg?
Boiling of this giant egg can take 45 to 90 minutes because of its size and thick shell.
Are ostrich eggs edible?
Yes. These delicious eggs are edible and are sometimes used in cooking. One egg can serve several people.
How long does it take for an ostrich egg to hatch?
It typically takes around 42 days to hatch.