Ever stood in a store, looked at a product listed in inches, and thought — wait, how long is that actually? You’re not alone. Length conversion is one of those everyday things that sounds simple but trips people up all the time.
Whether you’re buying furniture online, reading a medical form, following a recipe that uses different units, or just trying to understand how tall 6 feet really is in centimeters — this guide covers everything you need. In plain English. No math degree required.
Why Do We Even Have Different Units?
Here’s a quick bit of context before we dive in.
Most of the world uses the metric system — meters, centimeters, millimeters. It’s logical, it’s decimal-based, and once you learn it, it’s easy to scale up or down.
Then there’s the imperial system — feet, inches, yards, miles. Mostly used in the United States (and partially in the UK). It has historical roots going back centuries, and while it can feel a bit arbitrary, billions of people still use it daily.
The problem? These two systems don’t talk to each other naturally. So when you need to cross from one to the other, you need a conversion.
That’s what this guide is for.
Feet to Meters: The Basics
Let’s start with the big one.
1 foot = 0.3048 meters
That’s the exact conversion. So if you want to turn feet into meters, you multiply by 0.3048. If you want to go the other way — meters to feet — you divide by 0.3048 (or multiply by 3.281).
Quick Reference Table: Feet to Meters
| Feet | Meters |
|---|---|
| 1 ft | 0.30 m |
| 2 ft | 0.61 m |
| 3 ft | 0.91 m |
| 4 ft | 1.22 m |
| 5 ft | 1.52 m |
| 6 ft | 1.83 m |
| 7 ft | 2.13 m |
| 8 ft | 2.44 m |
| 10 ft | 3.05 m |
| 20 ft | 6.10 m |
| 50 ft | 15.24 m |
| 100 ft | 30.48 m |
Real-Life Example
Say you’re looking at a room listed as 15 feet wide. How wide is that in meters?
15 × 0.3048 = 4.57 meters
Or maybe you’re reading a European apartment listing that says a room is 4 meters long. How many feet is that?
4 ÷ 0.3048 = 13.12 feet
Easy once you know the formula.
Inches to Centimeters: The Everyday Conversion
Now for the one people use even more often — inches to centimeters.
1 inch = 2.54 centimeters
To convert inches to centimeters, multiply by 2.54. To go from centimeters to inches, divide by 2.54.
Quick Reference Table: Inches to Centimeters
| Inches | Centimeters |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.70 cm |
| 6 in | 15.24 cm |
| 8 in | 20.32 cm |
| 10 in | 25.40 cm |
| 12 in | 30.48 cm |
| 18 in | 45.72 cm |
| 24 in | 60.96 cm |
| 36 in | 91.44 cm |
Real-Life Example
You found a picture frame listed as 8×10 inches. What’s that in centimeters?
8 × 2.54 = 20.32 cm
10 × 2.54 = 25.40 cm
So it’s a 20 × 25 cm frame. Now you know if it’ll fit.
Converting Height: Feet & Inches to Centimeters
This one comes up a lot — especially on medical forms, dating profiles, and sports stats.
Heights in the US are usually written as feet and inches together, like 5’9″. In most other countries, height is given in centimeters. Here’s how to convert between the two.
The Formula
- Convert the feet to inches first (multiply by 12)
- Add the remaining inches
- Multiply the total inches by 2.54
Example: 5’9″ to centimeters
Step 1: 5 × 12 = 60 inches
Step 2: 60 + 9 = 69 inches total
Step 3: 69 × 2.54 = 175.26 cm
So 5’9″ is approximately 175 cm. That’s the average height for men in many countries, for reference.
Common Height Conversions
| Height (ft & in) | Centimeters |
|---|---|
| 4’11” | 149.9 cm |
| 5’0″ | 152.4 cm |
| 5’2″ | 157.5 cm |
| 5’4″ | 162.6 cm |
| 5’6″ | 167.6 cm |
| 5’8″ | 172.7 cm |
| 5’9″ | 175.3 cm |
| 5’10” | 177.8 cm |
| 5’11” | 180.3 cm |
| 6’0″ | 182.9 cm |
| 6’1″ | 185.4 cm |
| 6’2″ | 187.9 cm |
| 6’4″ | 193.0 cm |
Centimeters to Feet and Inches
Going the other way — say you see your height listed as 170 cm on a form and you want to know what that is in feet and inches.
The Formula
- Divide centimeters by 2.54 to get total inches
- Divide that by 12 to get feet (round down)
- The remainder is your inches
Example: 170 cm to feet and inches
Step 1: 170 ÷ 2.54 = 66.93 inches
Step 2: 66.93 ÷ 12 = 5 feet (with remainder)
Step 3: 66.93 − (5 × 12) = 66.93 − 60 = 6.93 inches → roughly 6¾ inches
So 170 cm ≈ 5’7″
Meters to Feet: Quick Conversions
If you’re dealing with larger distances — like room sizes, building heights, or outdoor measurements — you’ll often go between meters and feet.
1 meter = 3.2808 feet (usually rounded to 3.28)
Quick Reference Table: Meters to Feet
| Meters | Feet |
|---|---|
| 0.5 m | 1.64 ft |
| 1 m | 3.28 ft |
| 1.5 m | 4.92 ft |
| 2 m | 6.56 ft |
| 3 m | 9.84 ft |
| 5 m | 16.40 ft |
| 10 m | 32.81 ft |
| 20 m | 65.62 ft |
| 100 m | 328.08 ft |
Millimeters and Yards: The Others Worth Knowing
While feet, meters, inches, and centimeters cover 90% of what most people need, here are a couple of other conversions that come up:
Millimeters (mm) to Inches
1 inch = 25.4 mm — so to convert: mm ÷ 25.4 = inches
Common use: screen sizes, bolt widths, ring sizes.
Yards to Meters
1 yard = 0.9144 meters — so to convert: yards × 0.9144 = meters
Common use: fabric, sports fields, golf distances.
Kilometers to Miles
1 km = 0.6214 miles — so to convert: km × 0.6214 = miles
Common use: road distances, running races (a 5K = 3.1 miles).
Where You’ll Actually Use These Conversions
Let’s be honest — you don’t convert units for fun. Here are the real situations where this comes up:
Shopping online from international stores
A US store lists a TV as 55 inches. A European store lists one as 139 cm. Are they the same size? (Yes — 55 × 2.54 = 139.7 cm. Almost identical.)
Understanding your height on international forms
Moving abroad, filling out a visa, or joining an international sports team? You’ll need your height in centimeters.
Home renovations and furniture
IKEA and many international brands use centimeters. US homes are measured in feet and inches. You’ll constantly go back and forth.
Medical records
Doctors in metric countries record height in cm and weight in kg. If your home records say 5’8″, that’s 172.7 cm.
Reading product specs
Phone screen sizes are in inches. Paper sizes (A4, A3) are in millimeters. TV dimensions go both ways depending on the brand.
Travel and navigation
Speed limits in Europe are km/h. Road signs in the US are in miles. Knowing the rough conversion (1 mile ≈ 1.6 km) helps when you’re driving abroad.
A Simple Trick to Estimate Without a Calculator
Can’t remember the exact numbers? Here are a few mental shortcuts that get you close enough for everyday use:
- Feet to meters: Roughly divide by 3 (it’s actually 3.28, but dividing by 3 gives a close estimate)
- Inches to cm: Multiply by 2.5 instead of 2.54 — close enough for most things
- Meters to feet: Multiply by 3 and add a little bit more
- Kilometers to miles: Multiply by 0.6 (or roughly cut by 40%)
These aren’t exact, but they’re useful when you just need a quick ballpark.
Skip the Math — Use a Length Calculator
Look, the formulas aren’t hard, but they’re also not something most people want to memorize and type out every time.
That’s exactly why tools like the Length Calculator on Decimaly exist. You enter the number, pick your units, and get the answer instantly — no math, no second-guessing, no rounding errors.
It handles all the conversions covered in this article:
- Feet ↔ Meters
- Inches ↔ Centimeters
- Meters ↔ Yards
- Millimeters ↔ Inches
- And more
Bookmark it. You’ll use it more than you think.
Common Questions About Length Conversion
How many centimeters is 5 feet?
5 feet = 152.4 centimeters. (5 × 12 = 60 inches × 2.54 = 152.4 cm)
Is 1 meter equal to 3 feet?
Close, but not exact. 1 meter = 3.2808 feet. For everyday purposes, “just over 3 feet” is a reasonable shorthand.
How many inches is 30 cm?
30 ÷ 2.54 = 11.81 inches — just under a foot.
What is 6 feet in cm?
6 × 12 = 72 inches × 2.54 = 182.88 cm — commonly rounded to 183 cm.
How tall is 160 cm in feet?
160 ÷ 2.54 = 62.99 inches = 5 feet 3 inches (roughly 5’3″).
What’s 12 inches in cm?
12 × 2.54 = 30.48 cm — which also happens to be exactly 1 foot in centimeters.
The Bottom Line
Length conversion doesn’t have to be confusing. Once you know the two core numbers —
- 1 inch = 2.54 cm
- 1 foot = 0.3048 meters
— everything else follows from there. You can do the math manually, use the mental shortcuts for quick estimates, or just plug your numbers into a free calculator and move on with your day.
Whichever way works for you, you now have everything you need to convert between feet, meters, inches, and centimeters with confidence.
Need to convert a length right now? Try the free Length Calculator at Decimaly.com — fast, accurate, and works on any device.
