How to Convert Height from Feet and Inches to Centimeters (Complete Guide)

Why Do You Need to Convert Your Height?

If you've ever filled out a medical form in Europe, applied for a visa in Asia, created a profile on an international dating app, or registered for a marathon abroad, you've probably been asked for your height in centimeters. In the United States, we say "five foot-nine." Almost everywhere else in the world, that same person is "175 cm."

The confusion gets worse because height is expressed as a compound measurement — feet AND inches — rather than a single number. You can't just convert feet to centimeters and call it done. You have to account for both parts.

This guide walks you through the conversion step by step, with real examples for common heights, a handy reference table, and the science behind why the world can't agree on how to measure how tall we are.

The Formula: Feet and Inches to Centimeters

The conversion requires two steps because height is given in two units (feet and inches) that need to be combined before converting.

Step 1: Convert feet to inches. There are 12 inches in 1 foot.
Step 2: Add the remaining inches to get total inches.
Step 3: Multiply total inches by 2.54 to get centimeters.

The complete formula:
cm = (feet × 12 + inches) × 2.54

Step-by-Step Examples

Example 1: 5 feet 9 inches (the average American male height)

• Step 1: 5 feet × 12 = 60 inches
• Step 2: 60 + 9 = 69 total inches
• Step 3: 69 × 2.54 = 175.26 cm

So when someone says they're "five-nine," they're about 175 cm tall.

Example 2: 5 feet 4 inches (the average American female height)

• Step 1: 5 feet × 12 = 60 inches
• Step 2: 60 + 4 = 64 total inches
• Step 3: 64 × 2.54 = 162.56 cm

"Five-four" equals approximately 163 cm.

Example 3: 6 feet 2 inches (a common height for basketball players)

• Step 1: 6 feet × 12 = 72 inches
• Step 2: 72 + 2 = 74 total inches
• Step 3: 74 × 2.54 = 187.96 cm

A "six-two" person is about 188 cm tall.

Example 4: 4 feet 11 inches (a common height for children and shorter adults)

• Step 1: 4 feet × 12 = 48 inches
• Step 2: 48 + 11 = 59 total inches
• Step 3: 59 × 2.54 = 149.86 cm

"Four-eleven" is approximately 150 cm.

Quick Reference: Common Heights Converted

Height (ft/in)	Total Inches	Height (cm)
4'0"	48	121.92
4'6"	54	137.16
4'8"	56	142.24
4'10"	58	147.32
5'0"	60	152.40
5'1"	61	154.94
5'2"	62	157.48
5'3"	63	160.02
5'4"	64	162.56
5'5"	65	165.10
5'6"	66	167.64
5'7"	67	170.18
5'8"	68	172.72
5'9"	69	175.26
5'10"	70	177.80
5'11"	71	180.34
6'0"	72	182.88
6'1"	73	185.42
6'2"	74	187.96
6'3"	75	190.50
6'4"	76	193.04
6'6"	78	198.12
6'8"	80	203.20

Converting Centimeters Back to Feet and Inches

Sometimes you need to go the other way — you know your height in centimeters and need to express it in feet and inches. Here's how:

Step 1: Divide centimeters by 2.54 to get total inches.
Step 2: Divide total inches by 12. The whole number is feet.
Step 3: The remainder is the remaining inches.

Example: Convert 180 cm to feet and inches.

• Step 1: 180 ÷ 2.54 = 70.87 total inches
• Step 2: 70.87 ÷ 12 = 5.91 → 5 feet
• Step 3: 0.91 × 12 = 10.9 inches

So 180 cm ≈ 5 feet 11 inches (rounded up from 10.9).

Why Does the U.S. Still Use Feet and Inches?

The United States is one of only three countries (along with Liberia and Myanmar) that hasn't officially adopted the metric system for everyday use. The reason is largely historical and economic.

The Imperial system of measurement dates back to the British Empire, and the U.S. inherited it. In 1975, Congress passed the Metric Conversion Act, which encouraged metrication but didn't require it. As a result, the U.S. uses a hybrid system: metric for science, medicine, and the military, but Imperial for everyday life — height, weight, road signs, cooking, and real estate.

Interestingly, the U.S. officially defined the inch in terms of the metric system back in 1959. The international agreement states that 1 inch = exactly 2.54 centimeters. So even the Imperial system is now anchored to metric standards.

Height Measurement Around the World

Different countries have different average heights, and understanding the conversions helps put global health data in perspective:

• Netherlands: Tallest average male height at 183.8 cm (6'0.3")
• United States: Average male height is 176.9 cm (5'9.6")
• United Kingdom: Average male height is 178.2 cm (5'10.2")
• Japan: Average male height is 172.6 cm (5'7.9")
• India: Average male height is 166.5 cm (5'5.6")
• Guatemala: Shortest average male height at 163.4 cm (5'4.3")

These differences reflect nutrition, genetics, healthcare access, and socioeconomic factors. Global health researchers use centimeters exclusively because it allows for precise, standardized comparisons across populations.

Common Mistakes When Converting Height

Mistake 1: Converting feet directly to centimeters

Some people multiply feet by 30 (a rough approximation) and ignore the inches entirely. For example, 5'9" would become 5 × 30 = 150 cm — which is wildly wrong. The correct answer is 175 cm. Always convert to total inches first.

Mistake 2: Forgetting that 12 inches = 1 foot

Because the Imperial system uses base-12 for feet-to-inches but base-10 for most other things, it's easy to accidentally use 10 instead of 12. Remember: 5 feet = 60 inches, not 50.

Mistake 3: Rounding too early

If you round at each step instead of at the end, errors compound. For example, converting 5'7": 5 × 12 = 60, plus 7 = 67, times 2.54 = 170.18 cm. If you'd rounded 2.54 to 2.5, you'd get 167.5 cm — a difference of nearly an inch.

Mistake 4: Confusing "feet" with "foot" in writing

In written form, "5 foot 9" and "5 feet 9 inches" mean the same thing. But when entering data into forms, some systems expect decimal feet (5.75 feet) while others expect separate feet and inches fields. Always check the format the form expects.

When You'll Need This Conversion

Here are real-world situations where you'll need to convert your height:

• Medical records: Doctors outside the U.S. record height in centimeters. If you're seeking medical care abroad, they'll ask for your height in cm.
• International driver's licenses: Some countries require height in centimeters on the license application.
• Sports registrations: International competitions (marathons, cycling events, martial arts tournaments) often list height requirements in cm.
• Visa and immigration forms: Many countries ask for height in centimeters on visa applications and immigration documents.
• Online shopping: International clothing size charts often use centimeters for height ranges. A European size chart might list "S: 164-170 cm" instead of "S: 5'4" to 5'7".
• Fitness tracking: Apps like MyFitnessPal, Strava, and Apple Health allow you to choose between Imperial and metric. If you switch to metric, your height will display in cm.
• BMI calculations: The standard BMI formula uses meters (which you get from centimeters by dividing by 100). Accurate height conversion is essential for an accurate BMI reading.

Frequently Asked Questions

1. How many cm is 5 feet 10 inches?

5'10" = (5 × 12 + 10) × 2.54 = 70 × 2.54 = 177.8 cm. This is a very common height for American men and is often considered the "average tall" height in many Western countries.

2. How tall is 170 cm in feet and inches?

170 ÷ 2.54 = 66.93 inches. 66.93 ÷ 12 = 5 feet with 6.93 inches remaining. So 170 cm ≈ 5 feet 7 inches.

3. Is 180 cm tall for a man?

180 cm equals 5 feet 11 inches. This is above average in most countries. In the U.S., it's about 1.1 inches above the average male height of 176.9 cm. In the Netherlands, it would be slightly below the national average. Height perception is relative to the population you're comparing against.

4. How do I convert my child's height to centimeters for a pediatrician abroad?

Use the same formula: cm = (feet × 12 + inches) × 2.54. For example, a child who is 3 feet 6 inches tall is (3 × 12 + 6) × 2.54 = 42 × 2.54 = 106.68 cm. Many international pediatric growth charts use centimeters exclusively, so having this number ready will help the doctor plot your child's growth accurately.

5. Why do some forms ask for height in centimeters instead of feet and inches?

Centimeters provide a single, precise number that's easier to use in calculations. Medical formulas (like BMI), clothing size algorithms, and ergonomic design standards all use metric measurements. A single number in cm eliminates the ambiguity of compound measurements and reduces data entry errors.

6. What's the difference between "5 foot" and "5 feet" when converting?

There's no mathematical difference — both mean the same thing. "5 foot" is informal/colloquial (common in spoken English: "I'm five foot ten"), while "5 feet" is grammatically standard. When doing the conversion, both mean 5 × 12 = 60 inches before adding any extra inches.

Whether you're filling out a form, shopping for clothes online, or just curious about how you measure up globally, knowing how to convert between feet/inches and centimeters is a practical skill that comes up more often than you'd expect. Bookmark this page and use our converter tool whenever you need a quick, accurate answer.