Converting imperial height measurements like feet and inches into the metric system shouldn't require a math degree. If you're looking to find the exact metric equivalent for heights ranging from five feet six inches up to five feet ten inches, you're in the right place. Whether you're filling out international travel documents, updating athletic profiles, or shopping online for clothes, knowing these exact conversions saves time and eliminates guesswork.
This guide breaks down the precise mathematical formulas, provides a complete breakdown of every height between 5'6" and 5'10", and answers common conversion questions.
The Conversion Formula: Feet and Inches to Centimeters
To convert any height given in feet and inches into centimeters, you need two fundamental conversion factors:
- 1 foot equals 30.48 centimeters.
- 1 inch equals 2.54 centimeters.
To calculate a total height in centimeters, convert the feet portion to inches by multiplying by 12, add the remaining inches, and then multiply the total number of inches by 2.54.
For example, to convert 5 feet 8 inches:
- Convert feet to inches: $5 \times 12 = 60$ inches.
- Add the remaining inches: $60 + 8 = 68$ total inches.
- Multiply by 2.54: $68 \times 2.54 = 172.72$ centimeters.
Rounding to one decimal place gives you 172.7 cm, which is standard for most personal identification and medical forms.
Complete Height Conversion Table: 5'6" to 5'10"
Here is the exact centimeter equivalent for every height increment between 5 feet 6 inches and 5 feet 10 inches.
- 5'6" (66 inches) = 167.64 cm (typically rounded to 167.6 cm or 168 cm)
- 5'7" (67 inches) = 170.18 cm (typically rounded to 170.2 cm)
- 5'8" (68 inches) = 172.72 cm (typically rounded to 172.7 cm)
- 5'9" (69 inches) = 175.26 cm (typically rounded to 175.3 cm)
- 5'10" (70 inches) = 177.80 cm (typically rounded to 177.8 cm or 178 cm)
For more detailed conversion tools and official measurement standards, you can consult the National Institute of Standards and Technology (NIST) guidelines on metric units.
Common Mistakes When Converting Height
People often make a few avoidable errors when switching between imperial and metric measurements. Watch out for these pitfalls:
- Confusing inches with decimals: A common mistake is treating inches as decimals of a foot. For instance, writing 5.8 feet as 5 feet 8 inches. In reality, 0.8 of a foot is about 9.6 inches ($0.8 \times 12$), not 8 inches. 5 feet 8 inches is actually expressed decimally as roughly 5.67 feet.
- Over-rounding too early: If you round your intermediate steps to whole numbers before multiplying by 2.54, your final centimeter calculation can drift by a full centimeter. Always do the full multiplication before rounding.
- Forgetting shoes and posture: Official medical measurements taken at a doctor's office are always done barefoot. If you measure yourself at home in shoes, your height will naturally skew higher by an inch or two.
Frequently Asked Questions
What is 5 feet 8 inches in centimeters?
5 feet 8 inches equals exactly 172.72 centimeters. In most everyday contexts, people round this figure to 172.7 cm or 173 cm.
How do I convert centimeters back to feet and inches?
Divide your total centimeter measurement by 2.54 to find total inches. Then, divide by 12 to get the number of feet, and use the remainder as your inches. For instance, 175 cm divided by 2.54 is roughly 68.89 inches, which breaks down to 5 feet 8.89 inches (about 5'9").
Why do medical records often round height measurements?
Clinics and hospitals often record height to the nearest half-centimeter or quarter-inch depending on the digital scale used. While mathematical formulas yield exact decimal outputs, standard clinical reporting prioritizes practical readability.
Is 5 feet 10 inches considered tall globally?
Average adult heights vary significantly by region and demographics. According to global health data compiled by organizations like the World Health Organization (WHO), a height of 5'10" (177.8 cm) is above the global average for adult women and slightly above or near average for adult men depending on the country.
