Quick Answer:
20 centimeters equals 7.87 inches. To convert centimeters to inches, divide the centimeter value by 2.54 because 1 inch = 2.54 centimeters.
Formula:
Centimeters ÷ 2.54 = Inches20 ÷ 2.54 = 7.87 inches
If you’re wondering what is 20 centimeters in inches and how this measurement really looks in everyday life, you’re not alone. Many people use centimeters for school, crafts, product sizes, and international measurements but need a quick way to picture the size in inches. A measurement of 20 cm is just under 8 inches, making it easy to compare with common objects like pencils, smartphones, books, and household items. In this guide, you’ll find conversion charts, visual comparisons, practical examples, and simple explanations to understand exactly how long 20 centimeters is.
20 Centimeters to Inches Conversion Table
| Centimeters (cm) | Inches (in) | Practical Comparison |
|---|---|---|
| 1 cm | 0.39 inches | About the width of a small fingernail |
| 5 cm | 1.97 inches | Small coin-sized length |
| 10 cm | 3.94 inches | About half the length of a smartphone |
| 15 cm | 5.91 inches | Similar to a large pen |
| 20 cm | 7.87 inches | About the length of a small tablet or pencil |
| 25 cm | 9.84 inches | Close to a standard notebook width |
| 30 cm | 11.81 inches | Almost one foot |
What Does 20 Centimeters Mean?
A centimeter is a metric unit of length commonly used around the world. It is part of the metric system and is smaller than a meter.
- 100 centimeters = 1 meter
- 2.54 centimeters = 1 inch
- 20 centimeters = 0.2 meters
In everyday measurements, 20 cm is a moderate length. It is not very small like a few centimeters, but it is also much shorter than a foot-long measurement.
When converted to the imperial system, 20 centimeters becomes approximately 7.87 inches, which most people round to about 8 inches for quick estimates.
How to Convert 20 Centimeters Into Inches
The conversion is simple because inches and centimeters have a fixed relationship.
Step-by-Step Conversion:
Step 1: Start with the measurement
20 centimeters
Step 2: Use the conversion factor
1 inch = 2.54 centimeters
Step 3: Divide
20 ÷ 2.54 = 7.874
Step 4: Round if needed
20 cm ≈ 7.87 inches
For everyday purposes, you can think of:
20 cm ≈ 8 inches
Quick Reference: 20 cm Compared to Common Objects
Understanding numbers becomes easier when you connect them to objects you see every day. Here are realistic examples of items close to 20 centimeters (7.87 inches).
Real-Life Examples of 20 Centimeters
Example 1: A Standard Pencil
Measurement: Around 19–20 cm (7.5–8 inches)
Visualization:
Place a regular wooden pencil next to a ruler. Most full-size pencils are almost exactly the same length as 20 cm.
Why it helps:
Pencils are common objects, so they make an excellent mental reference.
Interesting insight:
A new pencil often starts close to 20 cm but becomes much shorter after repeated sharpening.
Example 2: A Small Tablet or E-Reader
Measurement: Around 20 cm tall
Visualization:
Imagine a compact tablet standing upright. Its shorter side may be close to 20 cm.
Why it helps:
Most people have seen tablets, making the size easier to picture.
Interesting insight:
Many portable devices are designed around metric measurements because manufacturers use global sizing standards.
Example 3: A Large Smartphone Length
Measurement: Some phones are about 15–17 cm long, while larger models approach 17–18 cm.
Visualization:
20 cm is slightly longer than many large smartphones.
Why it helps:
Your phone is usually nearby, making it a convenient comparison.
Interesting insight:
A 20 cm length is roughly a little longer than a typical phone.
Example 4: A Small Kitchen Knife Blade
Measurement: Many small kitchen knife blades are around 20 cm
Visualization:
Picture the sharp cutting part of a smaller chef knife.
Why it helps:
Kitchen tools often have lengths people recognize.
Interesting insight:
Knife sizes are frequently measured in centimeters in many countries.
Example 5: A Ruler Segment
Measurement: 20 cm
Visualization:
Take a standard 30 cm ruler and look at the section from zero to the 20 cm mark.
Why it helps:
A ruler gives the most accurate visual representation.
Interesting insight:
20 cm covers two-thirds of a typical school ruler.
Example 6: A Paperback Book Height
Measurement: Many small books are around 19–21 cm tall
Visualization:
Think of a compact paperback novel.
Why it helps:
Books are everyday objects with predictable sizes.
Interesting insight:
Publishers use standard dimensions to make books easier to store and carry.
Example 7: A Dinner Plate Diameter (Small Size)
Measurement: Some smaller plates are near 20 cm wide
Visualization:
Imagine a small dessert plate.
Why it helps:
It gives a circular comparison instead of a straight line.
Interesting insight:
Dinnerware sizes vary widely, but smaller plates often fall near this range.
Example 8: Hand Width Plus Fingers
Measurement: About 20 cm across for some adults
Visualization:
Stretch your hand open and compare the width from thumb tip to little finger tip.
Why it helps:
Your body can act as a measuring tool.
Interesting insight:
Human hand sizes vary, so this is only an estimate.
Example 9: A Small Picture Frame
Measurement: Around 20 cm wide
Visualization:
Imagine a small tabletop photo frame.
Why it helps:
Frames are common household objects.
Interesting insight:
Many decorative items use metric dimensions because they are sold internationally.
Example 10: Three Credit Cards Side by Side (Approximate)
Measurement: Three cards are much longer than 20 cm, but two cards placed lengthwise are close to this scale.
Visualization:
Think about the size of payment cards and how they stack up.
Why it helps:
Cards are familiar and easy to compare.
Interesting insight:
Credit cards follow a global standard size measured in millimeters.
20 Centimeters Compared to Other Measurements
| Measurement | Equivalent | Size Comparison |
|---|---|---|
| 1 cm | 0.39 inches | Small fingernail width |
| 5 cm | 1.97 inches | Small object length |
| 10 cm | 3.94 inches | Half of 20 cm |
| 20 cm | 7.87 inches | Target measurement |
| 30 cm | 11.81 inches | About one foot |
| 50 cm | 19.69 inches | About half a meter |
| 100 cm | 39.37 inches | One meter |
Smaller vs Larger: Understanding the Scale
Smaller Than 20 cm
Measurements below 20 cm include:
- A pen cap
- Small toys
- A wallet
- A smartphone width
- Small tools
These objects are noticeably shorter than 20 cm.
Larger Than 20 cm
Measurements above 20 cm include:
- A sheet of paper length
- A laptop width
- A standard ruler
- A shoe length
- A foot measurement
A 20 cm object sits between small handheld items and larger household measurements.
How 20 Centimeters Feels in Real Life
Walking Comparison
Walking 20 cm is extremely short.
It is less than one normal step and about the length of moving your foot slightly forward.
A typical adult step is around 60–80 cm, so 20 cm is only a small fraction of a walking stride.
Human Body Comparison
A 20 cm measurement is:
- About the length of a large pencil
- Similar to some hand spans
- Less than most adult forearms
- Around the length of many small objects held in one hand
Furniture Comparison
20 cm is useful for:
- Small shelf spacing
- Drawer handles
- Decorative items
- Compact storage areas
It is too short for large furniture dimensions but useful for small design details.
Practical Uses of a 20 cm Measurement
Construction and DIY
Builders use centimeter and inch conversions when measuring:
- Materials
- Fixtures
- Hardware
- Small installation spaces
Knowing that 20 cm equals about 8 inches helps when reading plans from different countries.
Interior Design
A 20 cm measurement can describe:
- Decorative objects
- Shelf spacing
- Small containers
- Frame sizes
Designers often switch between centimeters and inches depending on the audience.
Shopping
Online shopping often lists product dimensions in centimeters.
A 20 cm item could describe:
- Bags
- Accessories
- Electronics
- Kitchen tools
- Decorations
Converting to inches helps shoppers understand the size before buying.
Education
Students commonly convert centimeters to inches when learning:
- Measurement systems
- Geometry
- Science experiments
- Engineering basics
Frequently Asked Questions About 20 Centimeters in Inches
How many inches is 20 cm exactly?
20 centimeters equals approximately 7.874 inches. Rounded to two decimal places, it is 7.87 inches. For quick everyday estimates, most people round it to about 8 inches.
Is 20 cm the same as 8 inches?
Not exactly. 8 inches equals 20.32 centimeters, while 20 cm equals 7.87 inches. The difference is very small, so people often treat them as nearly the same for casual measurements.
What is the formula to convert centimeters to inches?
To convert centimeters into inches, divide the centimeter measurement by 2.54.
Formula:
Centimeters ÷ 2.54 = Inches
Example:
20 ÷ 2.54 = 7.87 inches
How many millimeters are in 20 cm?
There are 200 millimeters in 20 centimeters.
The conversion is:
1 cm = 10 mm
So:
20 × 10 = 200 mm
How long is 20 cm compared to a ruler?
On a standard 30 cm ruler, 20 cm reaches about two-thirds of the way from the starting point to the end. On an inch ruler, it is just under 8 inches.
Is 20 cm a big measurement?
20 cm is a medium-small length. It is larger than many handheld objects but smaller than common foot-long measurements. It is about the size of a pencil or small book.
What objects are about 20 cm long?
Common objects close to 20 cm include pencils, some small books, compact tablets, small kitchen tools, and certain decorative items.
How many feet is 20 cm?
20 centimeters equals approximately 0.656 feet. It is less than one foot because one foot equals 30.48 centimeters.
How many inches are in 20 centimeters for sewing?
For sewing and fabric work, 20 cm is usually converted as 7.87 inches. Many crafters round it to 8 inches when making quick measurements.
Why do some countries use centimeters instead of inches?
Most countries use the metric system because it provides a simple base-10 measurement system. Inches are mainly used in the United States and a few other regions.
Conclusion
20 centimeters equals 7.87 inches, which is commonly rounded to about 8 inches. Understanding this conversion becomes much easier when you compare it with familiar objects like pencils, books, rulers, and small devices.
Whether you are measuring for a DIY project, checking product dimensions, studying, or converting between metric and imperial units, knowing that 20 cm is just under 8 inches gives you a practical way to visualize the size instantly.
