Barn owls are medium-sized owls with a slim body, long legs, broad wings, and a heart-shaped white face. At first glance, they may look large because of their wingspan, but they are much lighter than many people expect. A full-grown American Barn Owl is usually 12.6–15.8 inches long, weighs about 14.1–24.7 ounces, and has a wingspan of 39.4–49.2 inches. That means its wings can stretch more than 3 feet wide, even though its body is only a little over 1 foot long.
Barn Owl Size Overview
Barn owls are built for silent flight, not heavy power. Their body is narrow and lightweight, while their wings are long and rounded. This shape helps them fly slowly over fields, grasslands, farms, and open habitats while listening for mice and voles.
| Measurement | Barn Owl Size |
|---|---|
| Length | 12.6–15.8 in / 32–40 cm |
| Wingspan | 39.4–49.2 in / 100–125 cm |
| Weight | 14.1–24.7 oz / 400–700 g |
| Size in feet | About 1.05–1.3 ft long |
| Wingspan in feet | About 3.3–4.1 ft wide |
Although barn owls are not the biggest owls, their pale color and ghost-like flight make them appear larger at night. Their wingspan is the most impressive part of their size.
Barn Owl Size in Inches, Feet and Centimeters
A barn owl’s body length is usually measured from the bill to the end of the tail. Most adults are around 13 to 16 inches long, which equals about 32 to 40 cm. In feet, that is roughly 1.1 to 1.3 feet.
Their wingspan is much larger than their body length. A barn owl’s wings can spread about 39 to 49 inches, or 100 to 125 cm. In feet, this is about 3.3 to 4.1 feet wide. This is why a flying barn owl can look surprisingly big even though the bird is not very heavy.
Barn Owl Size in Inches
In inches, a typical adult barn owl is:
- Length: 12.6–15.8 inches
- Wingspan: 39.4–49.2 inches
- Body height when perched: around 13–16 inches
- Weight: 14.1–24.7 ounces
Barn Owl Size in Feet
In feet, a barn owl is about:
- Body length: 1.05–1.3 feet
- Wingspan: 3.3–4.1 feet
This means a barn owl’s wingspan can be about three times longer than its body.
Barn Owl Size in Centimeters
In centimeters, an adult barn owl is usually:
- Length: 32–40 cm
- Wingspan: 100–125 cm
- Weight: 400–700 g
Animal Diversity Web gives a similar range for barn owls, listing their length at 32–40 cm, mass at 430–620 g, and wingspan at 107–110 cm, with females generally larger than males.
Barn Owl Size and Weight
Barn owls are lighter than many other owls of similar wingspan. Their weight usually ranges from 400 to 700 grams, or about 0.9 to 1.5 pounds. This lightweight body helps them fly quietly and efficiently.
A barn owl may look as big as a crow or small hawk in flight, but it often weighs less than expected. Its feathers add volume, making the bird look fuller than its real body size. Under the feathers, barn owls are slim and lightweight.
Female barn owls are usually larger than males. BioKIDS notes that females weigh around 570 grams, while males are around 470 grams. This difference is common in many owl species, where females are often bigger and heavier.
Female Barn Owl Size
Female barn owls are generally a little larger and heavier than males. The difference is not always easy to notice in the field, but it can be seen when birds are measured or weighed.
A female barn owl may have:
- Slightly heavier body weight
- Slightly broader wings
- Fuller body shape
- More noticeable spotting on the breast in some populations
The female’s larger size may help during nesting because she spends time incubating eggs and brooding young owlets.
Male Barn Owl Size
Male barn owls are usually smaller and lighter. They are still strong hunters and may bring food to the female and young during the breeding season.
A male barn owl may be:
- Lighter than the female
- Slimmer in body shape
- Slightly smaller in wingspan
- More active in food delivery during nesting
However, size alone is not always the best way to identify male and female barn owls because individuals can overlap in size.
Baby Barn Owl Size by Age
Baby barn owls grow quickly, but they do not look like adults when they first hatch. They hatch naked or nearly naked and soon develop a thin covering of down. Young owlets cannot keep themselves warm at first, so the female broods them until the oldest chick is around three weeks old.
| Age | Baby Barn Owl Size and Appearance |
|---|---|
| Newly hatched | Tiny, weak, mostly naked, eyes closed |
| 1 week | Thin white down begins to cover body |
| 2–3 weeks | Bigger, fluffy, still depends on female for warmth |
| 4–5 weeks | More down, stronger legs, growing fast |
| 6–8 weeks | Feathers developing, looks more owl-like |
| 9–10 weeks | Near fledging size, mostly feathered |
| After fledging | Similar body size to adult but still learning to hunt |
Barn Owl Trust explains that nestlings do not look old enough to leave the nest and have few or not fully grown proper feathers, while fledglings look almost old enough to leave and are mostly feathered with some wispy down remaining.
Barn Owl Size Compared to a Human
Compared to a human, a barn owl is small in body length but wide in wingspan. A perched barn owl is about the height of a large ruler or a small house cat sitting upright. However, when it spreads its wings, it can reach more than 3 feet across.
A simple comparison:
| Comparison | Barn Owl |
|---|---|
| Compared to adult human height | Much shorter |
| Compared to human arm length | Wingspan can be similar to one extended arm or more |
| Compared to human hand | Talons and feet are small but strong |
| Compared to house cat | Similar or slightly taller when perched, but much lighter |
A barn owl may look dramatic when flying near a person because its wings are broad and pale. Still, it is not a heavy bird.
Barn Owl Size Chart
Here is a quick barn owl size chart for easy comparison.
| Category | Size |
|---|---|
| Small adult | Around 12.6 in / 32 cm |
| Average adult | Around 14–15 in / 36–38 cm |
| Large adult | Up to 15.8 in / 40 cm |
| Light adult | Around 14 oz / 400 g |
| Heavy adult | Up to 24.7 oz / 700 g |
| Average wingspan | Around 3.5–4 ft |
This chart is useful for identifying barn owls in the field, especially when comparing them with other owl species.
Barn Owl vs Great Horned Owl Size
The Great Horned Owl is much larger and heavier than the Barn Owl. While a Barn Owl weighs less than 2 pounds, a Great Horned Owl can weigh several pounds and has a stronger, bulkier body. Great Horned Owls typically weigh about 2 to 5.5 pounds and have a wingspan of about 3.3 to 4.8 feet.
| Feature | Barn Owl | Great Horned Owl |
|---|---|---|
| Length | 12.6–15.8 in | Larger and bulkier |
| Weight | 14.1–24.7 oz | About 2–5.5 lb |
| Wingspan | 39.4–49.2 in | About 3.3–4.8 ft |
| Body build | Slim and light | Heavy and powerful |
| Ear tufts | No | Yes |
A Great Horned Owl is stronger, heavier, and more powerful. A Barn Owl is lighter, paler, and more slender.
Barn Owl vs Barred Owl Size
The Barred Owl is also larger and heavier than the Barn Owl. Barred Owls are about 16.9–19.7 inches long, weigh 16.6–37 ounces, and have a wingspan of 39–43.3 inches.
| Feature | Barn Owl | Barred Owl |
|---|---|---|
| Length | 12.6–15.8 in | 16.9–19.7 in |
| Weight | 14.1–24.7 oz | 16.6–37 oz |
| Wingspan | 39.4–49.2 in | 39–43.3 in |
| Eye color | Dark eyes | Dark eyes |
| Shape | Slim, heart-shaped face | Round head, heavier body |
The Barn Owl may have a similar wingspan to some Barred Owls, but the Barred Owl is generally longer and heavier.
Barn Owl vs Tawny Owl Size
The Tawny Owl and Barn Owl are both medium-sized owls, but they have different body shapes. Tawny Owls are usually rounder and more compact, while Barn Owls are slimmer with longer legs and a more heart-shaped face.
| Feature | Barn Owl | Tawny Owl |
|---|---|---|
| Body shape | Slim and long-legged | Rounder and compact |
| Face | Heart-shaped | Rounded facial disc |
| Habitat | Open fields, barns, grasslands | Woods, parks, forests |
| Flight look | Pale, ghost-like | Darker and round-winged |
A Barn Owl often looks paler and more delicate, while a Tawny Owl looks stockier.
Barn Owl vs Snowy Owl Size
The Snowy Owl is much larger and heavier than the Barn Owl. Snowy Owls are powerful Arctic owls with thick bodies, broad wings, and heavy feathering. Compared with a Barn Owl, a Snowy Owl looks bulkier, stronger, and more eagle-like.
| Feature | Barn Owl | Snowy Owl |
|---|---|---|
| Size class | Medium | Large |
| Body shape | Slim | Heavy and powerful |
| Color | Pale white and buff | Mostly white |
| Habitat | Farms, grasslands, barns | Arctic tundra, winter open areas |
A Barn Owl may look white at night, but it is much smaller and lighter than a Snowy Owl.
Barn Owl vs Screech Owl Size
Screech owls are much smaller than Barn Owls. A Barn Owl is medium-sized, while Eastern and Western Screech Owls are small, compact owls with short bodies and small wingspans.
| Feature | Barn Owl | Screech Owl |
|---|---|---|
| Size class | Medium | Small |
| Body length | About 13–16 in | Much shorter |
| Wingspan | About 3.3–4.1 ft | Much smaller |
| Face | Heart-shaped | Rounded with ear tufts |
| Build | Slim | Compact |
If you see a pale owl flying over fields, it is more likely to be a Barn Owl than a Screech Owl. Screech Owls are usually found in trees and cavities and are much smaller.
American, Western and Eastern Barn Owl Size
The term American Barn Owl is often used for barn owls in the Americas. Cornell lists the American Barn Owl at 12.6–15.8 inches long, 14.1–24.7 ounces, with a 39.4–49.2 inch wingspan.
“Western Barn Owl” and “Eastern Barn Owl” can refer to different regional forms depending on taxonomy and location. In general, most barn owls remain in a similar medium-size range, but exact size can vary by subspecies, sex, and region. Animal Diversity Web notes that many subspecies are recognized based on differences in body size and coloration.
Why Barn Owls Look Bigger Than They Are
Barn owls often look bigger because of three reasons. First, their wingspan is much longer than their body. Second, their pale feathers make them stand out at night. Third, their fluffy plumage adds volume.
A barn owl’s actual body is lightweight. This helps it fly slowly and silently while hunting. Its size is designed for open-country hunting, where it glides low over fields and listens for prey.
FAQs
How big is a Barn Owl?
A Barn Owl is usually 12.6–15.8 inches long, weighs 14.1–24.7 ounces, and has a wingspan of 39.4–49.2 inches.
What is the Barn Owl size in feet?
A Barn Owl is about 1.05–1.3 feet long. Its wingspan is much wider, usually about 3.3–4.1 feet.
Is a Barn Owl bigger than a Great Horned Owl?
No. A Great Horned Owl is much bigger, heavier, and stronger than a Barn Owl. Barn Owls are slimmer and lighter.
How big is a baby Barn Owl?
A baby Barn Owl is tiny and weak when newly hatched. It grows quickly, becomes fluffy with down, and looks close to adult size by the fledging stage.
Are female Barn Owls bigger than males?
Yes. Female Barn Owls are usually larger and heavier than males. One source lists females around 570 grams and males around 470 grams.
