If you’ve ever seen a measurement written as “5.11 feet” and wondered whether it means the same as 5 feet 11 inches, you’re not alone. These two notations look similar but represent completely different values — a distinction that trips up even people who work with measurements regularly. This guide cuts through the confusion with the exact conversion formulas, a side-by-side comparison, and practical examples you can use right now.

5.11 feet (decimal): 155.753 cm · 5 feet 11 inches: 180.34 cm · 1 foot: 30.48 cm · 1 inch: 2.54 cm

Quick snapshot

1Confirmed facts
2What’s unclear
  • Height perception varies by region and demographics — estimates suggest this varies widely across populations
  • Decimal feet rarely used outside technical/surveying contexts
3Timeline signal
  • Metric standardization finalized in the 20th century — sources indicate this accelerated after 1960
  • Online converters proliferated in the 2000s–2020s
4What’s next
  • You’ll learn the exact conversion formulas and when to use each notation

What height is 5’11 in cm?

When someone asks about 5’11” in centimeters, they’re using the traditional feet-and-inches notation where the apostrophe represents feet and the double-quote represents inches. This is the standard way Americans and Britons express human height.

Five feet 11 inches converts to exactly 180.34 centimeters (Inch Calculator height converter). The calculation works by converting everything to inches first (5 feet × 12 = 60 inches, plus 11 inches = 71 total inches), then multiplying 71 by 2.54 cm per inch.

Conversion formula

The complete formula is: cm = (feet × 12 + inches) × 2.54 (MiniWebtool conversion tool). For 5’11”: (5 × 12 + 11) × 2.54 = 71 × 2.54 = 180.34 cm.

Exact value

This conversion is exact by definition, since one inch equals exactly 2.54 centimeters — a value established as an international standard (RapidTables measurement reference).

The upshot

5 feet 11 inches is not the same as 5.11 decimal feet — a single digit after the decimal point creates a 24.6 cm difference that matters in precise measurements.

Is 180 cm 5ft 11?

The short answer: 180 cm is very close to 5’11”, but not exactly. One inch equals 2.54 cm, so 180 cm converts to approximately 70.87 inches — which translates to 5 feet 10.87 inches.

The difference between 180 cm and 5’11” (180.34 cm) is only 0.34 cm — less than half a centimeter. For most practical purposes, 180 cm and 5’11” are effectively interchangeable when describing human height.

Close equivalents

Five feet 10 inches equals 177.8 cm, while 5’11” equals 180.34 cm (MiniWebtool converter). The 2.54 cm gap between these heights represents exactly one inch.

Decimal vs inches

Some measurement systems use decimal feet instead of feet-and-inches. Five feet 11 inches equals approximately 5.917 decimal feet (CalculateMe conversion calculator). The 11 inches of residual measurement equals 0.917 feet — explaining why the decimal representation looks nothing like the inches notation.

Why this matters

Construction and surveying professionals often work with decimal feet (5.917 ft) rather than feet-and-inches (5’11”), so confusion between these notations can lead to costly measurement errors on job sites.

Is 5’11 considered tall for a man?

Whether 5’11” (180.34 cm) is tall depends heavily on where you are. In the United States, the average adult male height is approximately 175.4 cm (5’9″), making 5’11” about 5 cm above average — noticeably taller than typical.

In many European countries, however, average male heights already approach or exceed 180 cm. Dutch men average around 184 cm (6’0.4″), while German and Swedish men typically stand near 180 cm. For someone from Northern Europe, 5’11” might be closer to average than “tall.”

Average heights

Global height data from health surveys shows that average male height ranges from about 165 cm in certain South Asian and Southeast Asian populations to 185 cm in the Netherlands and other Northwestern European countries. This 20 cm spread means “tall” is relative.

Context by region

Height perception also shifts by context. In professional sports or fashion modeling, 180 cm for men may be considered short. In everyday interactions, a 5’11” man often commands slightly more attention in group photos and can reach standard shelf heights comfortably.

The implication: A 5’11” man navigating a Dutch social setting may appear shorter than local average, while the same person in rural Mexico might stand noticeably taller than most.

Bottom line: 5’11” (180.34 cm) falls above average in most countries but may be unremarkable in Northern Europe. For practical purposes like clothing sizing or doorframe clearance, treat it as a solid six-foot-equivalent.

What is 5.11 feet in cm?

This is where the confusion typically starts. When you see “5.11 feet” written without apostrophes or quotation marks, it means 5 and 11/100 feet — a decimal representation, not 5 feet and 11 inches.

To convert 5.11 feet to centimeters, multiply by 30.48 (the number of centimeters in one foot). Five times 30.48 equals 152.40 cm, and 0.11 times 30.48 equals 3.353 cm. Adding these together gives 155.753 cm total.

Decimal calculation

The formula for decimal feet to centimeters is straightforward: cm = feet × 30.48. For 5.11 feet: 5.11 × 30.48 = 155.753 cm (RapidTables conversion reference). This is a pure linear conversion with no additional steps.

Comparison to inches notation

The gap between 5.11 decimal feet (155.753 cm) and 5’11” (180.34 cm) is 24.587 cm — nearly 10 inches. This massive difference stems from how the decimal portion is calculated. Eleven hundredths of a foot equals only 1.32 inches (0.11 × 12), not the 11 full inches you might expect from reading the number casually.

According to measurement educators, the decimal portion of a feet value always represents a fraction of one foot, never whole inches. This is why 5.11 ft reads as just over 5 feet, not nearly 6 feet.

The catch

A measurement like “5.11 feet” in decimal format means “5 and 11/100 feet,” not “5 feet and 11 inches.” The decimal fraction represents a portion of one foot, not whole inches.

How to convert feet to cm?

Converting feet and inches to centimeters requires two constants: 30.48 cm per foot and 2.54 cm per inch. Both are exact definitions, not approximations, so your conversions will be precise every time.

Step-by-step

To convert feet and inches to centimeters (Inch Calculator step-by-step guide):

  1. Step 1: Multiply feet by 12 to convert to total inches. Example: 5 feet × 12 = 60 inches.
  2. Step 2: Add the remaining inches. Example: 60 + 11 = 71 total inches.
  3. Step 3: Multiply total inches by 2.54. Example: 71 × 2.54 = 180.34 cm.

For decimal feet (like 5.11 feet), simply multiply by 30.48: 5.11 × 30.48 = 155.753 cm.

Tools and charts

Online converters from MiniWebtool online calculator and Inch Calculator tool handle the math automatically. For quick reference, remember that 6 feet equals 182.88 cm and 5 feet equals 152.4 cm (RapidTables reference table).

Height charts often show adjacent values: 5’10” equals 177.8 cm, while 6’0″ equals 182.88 cm — placing 5’11” (180.34 cm) exactly in the middle of that 2-inch range.

The pattern: Each 1-inch increment adds exactly 2.54 cm to the total, making it simple to interpolate between known values when you don’t have a converter handy.

Bottom line: Converting between feet/inches and centimeters hinges on one question: Is your measurement in decimal feet (like 5.11) or feet-and-inches notation (like 5’11”)? Ask before you calculate, or risk a 24 cm error.

The table below summarizes common height conversions for quick reference:

Measurement Equivalent
5.11 feet (decimal) 155.753 cm
5 feet 11 inches 180.34 cm
Conversion factor (feet to cm) 30.48
Conversion factor (inches to cm) 2.54
180 cm in feet/inches 5 ft 10.87 in
6 feet 182.88 cm
5 feet 10 inches 177.8 cm
5 feet 8 inches 172.72 cm

What this means for anyone working across measurement systems: keep a conversion chart handy or double-check notation before accepting a height value at face value.

Upsides

  • Conversion constants are exact by definition — no rounding errors
  • Feet-and-inches notation is intuitive for human height
  • Online tools make conversions instant and error-free
  • Metric equivalent (180.34 cm) works globally for sizing and medical records

Downsides

  • Decimal feet vs. feet-inches confusion causes regular mistakes
  • Not all software handles both notation systems correctly
  • International contexts may expect metric-only measurements
  • Small rounding differences appear across conversion tools

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The common confusion distinguishing 5.11 feet at 155.753 cm from 5’11” at 180.34 cm finds a parallel explanation in the precise 5.11 feet analysis, with matching charts and formulas.

Frequently asked questions

How do you convert feet and inches to cm?

Multiply feet by 12 to get inches, add the remaining inches, then multiply the total by 2.54. For 5’11”: (5×12 + 11) × 2.54 = 180.34 cm.

What is 6 feet in cm?

Six feet equals 182.88 centimeters (6 × 30.48).

Is 175 cm equal to 5’9?

Yes, approximately. 5 feet 9 inches equals 175.26 cm, so 175 cm is just 0.26 cm short of 5’9″.

What tools can convert height online?

Online height converters from Inch Calculator, MiniWebtool, and RapidTables handle feet-and-inches to centimeter conversions instantly.

Why do conversions sometimes differ slightly?

Differences typically come from rounding decisions — some tools show two decimal places (180.34 cm) while others show one (180.3 cm) or none (180 cm). The underlying calculation is always the same.

How accurate are height converters?

Height converters are highly accurate when using the exact constants (30.48 cm/foot, 2.54 cm/inch). Differences between tools stem from display rounding, not calculation errors.

What is 5.1 feet in cm?

5.1 decimal feet equals 155.448 cm (5.1 × 30.48). Note this is different from 5’1″ (five feet one inch), which equals 154.94 cm.

For anyone working across imperial and metric systems — whether you’re shopping for international clothing, reading architectural plans from another country, or simply satisfying a curiosity — knowing the difference between decimal feet and feet-and-inches notation prevents a surprisingly common 24-centimeter mistake. Keep the question in mind: “Is this a decimal or an inches value?” The answer determines everything.