Length converter
Centimeters to feet
Centimeters
170 cm
Decimal feet
5' 6.93"
Most people trip over one specific mistake: assuming that 5.9 feet means 5 feet 9 inches. It does not. 5.9 feet means 5 feet and 0.9 of a foot, which is 10.8 inches. The correct answer is 5 feet 10.8 inches. This confusion between decimal feet and feet-and-inches notation is the most common error in cm-to-feet conversion, and it changes a result by several inches.
The converter above avoids this entirely. Enter centimeters, and it returns all three outputs at once: decimal feet, the standard feet-and-inches notation (e.g. 5′ 6.93″), and total inches. Below you will find the formula, a height reference table, real-world use cases, and the mistakes worth knowing before you convert.
Table of Contents
- How to Use This Converter
- The CM to Feet Formula
- Why Three Outputs: Decimal Feet, ft and in, Total Inches
- Real-World Uses
- Height Reference Table
- Common Mistakes to Avoid
- Frequently Asked Questions
How to Use This Converter
The tool at the top of this page works in two steps.
- Enter a value in centimeters. Type any positive number. Decimals work: 170.5, 182, 152.4. The results update as you type, and the number stays fully visible as you add digits.
- Read all three outputs. The converter instantly returns decimal feet, feet-and-inches notation, and total inches. The breakdown cards below the main panels show each value separately so you do not need to calculate the inch remainder yourself.
The preset cards cover the four most searched height conversions: 150 cm (4′ 11″), 170 cm (5′ 7″), 180 cm (5′ 11″), and 200 cm (6′ 7″). Tap any preset for an instant result, or type your own value.
The CM to Feet Formula
Two exact constants cover all cm-to-feet conversions. Both come from the 1959 International Yard and Pound Agreement, which defined 1 inch as exactly 25.4 millimeters. All downstream conversions follow from this.
Centimeters to decimal feet:
feet = cm ÷ 30.48
Example: 170 ÷ 30.48 = 5.5774 feet
Centimeters to total inches:
inches = cm ÷ 2.54
Example: 170 ÷ 2.54 = 66.929 inches
Centimeters to feet and inches (two-step method):
- Divide by 2.54 to get total inches: 170 ÷ 2.54 = 66.929 in
- Divide total inches by 12. The whole number is feet; multiply the decimal by 12 to get the remaining inches: floor(66.929 ÷ 12) = 5 ft, remainder = 0.774 × 12 = 6.93 in
- Result: 5 feet 6.93 inches
The two-step method via total inches is more accurate than converting directly to feet and then extracting inches, because it uses the exact 2.54 cm-per-inch constant at the first step and avoids compounding rounding errors.
A quick mental estimate: 30 cm is roughly 1 foot. Divide centimeters by 30 for a fast approximation. For 180 cm, 180 ÷ 30 = 6 feet (exact: 5.906 feet). The estimate is within 2% and useful when precision is not needed.
Why Three Outputs: Decimal Feet, ft and in, Total Inches
All three outputs express the same measurement. Each one serves a different purpose.
Decimal feet (e.g. 5.5774) are required when you enter a height value into a spreadsheet, a construction estimating tool, or a CAD program. Formulas and unit-cost multiplications need a single decimal number, not a split feet-and-inches figure.
Feet and inches notation (e.g. 5′ 6.93″) is what US medical records, passport applications, visa forms, sports statistics, and everyday conversation use. When someone in the United States asks how tall you are, this is the format they expect.
Total inches (e.g. 66.93 in) is used in BMI calculations and some clinical height formulas. The US customary BMI formula uses height in inches: BMI = (weight in lbs × 703) ÷ (height in inches squared). A height of 170 cm gives 66.929 total inches, and 66.929 squared is the figure the formula needs.
Most converter tools return only decimal feet. This one returns all three so you do not need to run a second calculation depending on where the number is going.
Real-World Uses: When You Need This Conversion
Height for medical and official records
Height is measured and stored in centimeters in most countries. US medical forms, health insurance records, military enlistment documents, and immigration paperwork require feet and inches. An incorrect height entry can cascade into wrong BMI readings, incorrect medication dosages based on body surface area calculations, and errors in ergonomic equipment specifications. Converting accurately before entering the value matters more in these contexts than in everyday use.
According to research published across multiple studies, the global average height for adult men is approximately 171 cm (5 feet 7.3 inches) and for adult women approximately 159 cm (5 feet 2.6 inches). The Netherlands has one of the tallest average male heights at around 183.8 cm (6 feet 0.4 inches), while average heights in parts of Southeast Asia run closer to 165 cm (5 feet 5 inches). Knowing these benchmarks in both units helps when comparing health data across countries.
Dating apps and social platforms
Many dating apps default to feet and inches for height display, especially those popular in the US. A person from Germany who is 182 cm needs to know this equals 5 feet 11.65 inches. Rounding to 6 feet on a profile is a common choice, but knowing the exact conversion first lets you make that decision accurately.
Sports statistics
International athletes are measured in centimeters in their home countries. US sports leagues list heights in feet and inches. The NBA, NFL, MLB, and NHL all use imperial measurements in official player profiles. A 200 cm basketball prospect is 6 feet 6.74 inches, a figure scouts and coaches in the US need to evaluate the player against positional benchmarks. A 183 cm soccer player is 6 feet 0.05 inches. Converting between the two systems is a routine task for anyone working in or following international sport.
Construction and interior design
Building plans in metric countries specify room heights, door clearances, and ceiling heights in centimeters. US contractors and clients expect feet and inches. A standard 240 cm ceiling height is 7 feet 10.55 inches. A 210 cm door is 6 feet 10.69 inches. Converting before specification handoff prevents miscommunication between metric architects and imperial-standard contractors, which is a common source of error on international or cross-border construction projects.
Online shopping for furniture and appliances
European furniture listings use centimeters. US buyers assess fit in feet and inches. A sofa listed as 220 cm wide is 7 feet 2.6 inches. A 90 cm wardrobe depth is 2 feet 11.4 inches. Before purchasing imported furniture or appliances, convert the listed dimensions and compare them to your room measurements in the same unit.
Clothing and fashion
Garment length recommendations and sizing guides from European and Asian brands list inseam, sleeve, and overall garment lengths in centimeters. US buyers need these in inches or feet to compare with their own measurements. A 76 cm inseam is 29.92 inches, which corresponds to a US size 30 inseam.
Aviation and technical fields
Altitude in aviation is measured in feet in the US and many other countries. Technical documentation for aircraft components may list dimensions in millimeters or centimeters, requiring conversion to feet for clearance specifications or installation guidelines. Runway lengths, obstacle clearance heights, and approach minima are all stated in feet.
Height Reference Table: CM to Feet and Inches
| Centimeters (cm) | Decimal Feet (ft) | Feet and Inches | Total Inches |
|---|---|---|---|
| 140 | 4.5931 | 4′ 7.12″ | 55.12 |
| 145 | 4.7572 | 4′ 9.09″ | 57.09 |
| 150 | 4.9213 | 4′ 11.06″ | 59.06 |
| 155 | 5.0853 | 5′ 1.02″ | 61.02 |
| 160 | 5.2493 | 5′ 2.99″ | 62.99 |
| 163 | 5.3478 | 5′ 4.17″ | 64.17 |
| 165 | 5.4134 | 5′ 4.96″ | 64.96 |
| 168 | 5.5118 | 5′ 6.14″ | 66.14 |
| 170 | 5.5774 | 5′ 6.93″ | 66.93 |
| 172 | 5.6430 | 5′ 7.72″ | 67.72 |
| 175 | 5.7415 | 5′ 8.90″ | 68.90 |
| 177 | 5.8071 | 5′ 9.69″ | 69.69 |
| 178 | 5.8399 | 5′ 10.07″ | 70.08 |
| 180 | 5.9055 | 5′ 10.87″ | 70.87 |
| 183 | 6.0039 | 6′ 0.05″ | 72.05 |
| 185 | 6.0696 | 6′ 0.83″ | 72.83 |
| 190 | 6.2336 | 6′ 2.80″ | 74.80 |
| 195 | 6.3976 | 6′ 4.76″ | 76.77 |
| 200 | 6.5617 | 6′ 6.74″ | 78.74 |
| 210 | 6.8898 | 6′ 10.69″ | 82.68 |
For values not in the table, use the converter at the top of the page or apply: feet = cm ÷ 30.48.
Common Mistakes to Avoid
Treating decimal feet as feet and inches
This is the most frequent error. 5.9 feet is not 5 feet 9 inches. It is 5 feet 10.8 inches, because 0.9 feet × 12 = 10.8 inches. Similarly, 5.8 feet is 5 feet 9.6 inches, and 5.5 feet is exactly 5 feet 6 inches. The decimal portion of a feet value always needs to be multiplied by 12 to get the remaining inches. If a converter gives you only decimal feet, do not read the digits after the decimal as inches.
Using 30 instead of 30.48 as the divisor
Dividing by 30 instead of 30.48 introduces a 1.6% error. At 170 cm, this gives 5.667 feet instead of the correct 5.577 feet, a gap of about 1.09 inches. For a quick mental estimate, dividing by 30 is acceptable. For any recorded value, medical data, or construction dimension, always use 30.48.
Using 2.5 instead of 2.54 for the cm-per-inch conversion
Rounding 2.54 cm per inch down to 2.5 introduces a 1.6% error in the opposite direction. At 170 cm, using 2.5 gives 68 inches instead of the correct 66.93 inches, a difference of more than an inch. The exact factor is 2.54, defined by international standard since 1959.
Misplacing the decimal point
200 cm converts to 6.5617 feet, not 65.617 feet. When dividing by 30.48, the result for typical human heights will always be between 4 and 8 feet. If your result falls outside this range for a normal height value, check whether you moved the decimal point.
Rounding too early in a multi-step calculation
If you round 170 ÷ 2.54 = 66.929 inches to 67 inches before extracting feet and remaining inches, your final result shifts. 67 ÷ 12 = 5 feet 7 inches, but the correct answer is 5 feet 6.93 inches. Carry full decimal precision through every step and round only the final display value.
Frequently Asked Questions
How many feet is 1 cm?
1 centimeter equals 0.032808 feet. Divide any centimeter value by 30.48 to get decimal feet, or divide by 2.54 to get total inches first, then divide by 12 for feet.
What is the formula to convert cm to feet?
Divide the number of centimeters by 30.48 to get decimal feet. For 170 cm: 170 ÷ 30.48 = 5.5774 feet. To get feet and inches, take the whole number (5 feet) and multiply the decimal part by 12: 0.5774 × 12 = 6.93 inches. So 170 cm is 5 feet 6.93 inches.
Is 5.9 feet the same as 5 feet 9 inches?
No. 5.9 feet means 5 feet and 0.9 of a foot. Since 1 foot equals 12 inches, 0.9 feet equals 10.8 inches. So 5.9 feet is 5 feet 10.8 inches, not 5 feet 9 inches. This is the most common cm-to-feet conversion error.
How tall is 170 cm in feet?
170 cm equals 5 feet 6.93 inches, or 5.5774 decimal feet. This is close to the global average height for adult men, approximately 171 cm (5 feet 7.3 inches).
Why does the converter show three different outputs?
Decimal feet are needed for spreadsheets, construction software, and calculations. Feet-and-inches notation is what US forms, medical records, and everyday conversation use. Total inches is useful for BMI calculations and sports measurements. All three come from the same input, so the converter displays all of them at once.
