Convert ft and Inches to cm – Formula, Table & Guide

Have you ever needed to convert your height from feet and inches to centimeters but found yourself stuck without a calculator? Whether you’re filling out an international form, tracking your fitness, or just curious about metric equivalents, the conversion is simpler than you might think. With just two numbers—30.48 for feet and 2.54 for inches—you can handle any height. This guide walks you through the formula, provides a quick-reference table, and shows you how to reverse the process from centimeters back to feet and inches.

1 foot equals 30.48 cm ·
1 inch equals 2.54 cm ·
5 feet 8 inches 172.72 cm ·
6 feet 1 inch 185.42 cm

Exact conversion factors from international standards back every table in this guide.

How to Convert Feet and Inches to Centimeters

When you have a height written in feet and inches, the process is a straight two-step multiplication. You handle the feet and inches separately, then add the results together.

Feet to cm formula

• Multiply the number of feet by 30.48 (SplashLearn (education publisher)).
• Example: 5 feet × 30.48 = 152.4 cm (BYJU’S (math learning platform)).

Inches to cm formula

• Multiply the number of inches by 2.54 (Manuel’s Web (reference site)).
• Example: 7 inches × 2.54 = 17.78 cm.

Combined conversion example

To convert 5 feet 7 inches to cm: first convert the whole height to inches (5 × 12 + 7 = 67 inches), then multiply by 2.54: 67 × 2.54 = 170.18 cm (YouTube – Math with Mr. J (tutorial channel)).

The implication: the same formula works for any combination of feet and inches, including fractional inches, as long as you multiply correctly.

Common Height Conversions (ft + in to cm)

Here are some of the most-asked-for heights, calculated using the exact conversions. One pattern: the most searched height, 5′10″, lands exactly at 177.8 cm.

This table lets you read your centimeter equivalent directly.

What this means: if you know your height in feet and inches, you can read the centimeter equivalent directly from this table. For values not listed, apply the formula.

How to Convert Centimeters to Feet and Inches

Need to go the other direction? The reverse conversion is just as systematic.

Reverse conversion formula

• Divide the total centimeters by 30.48 to get the total feet (Manuel’s Web (reference site)).
• The integer part is the feet. Multiply the decimal remainder by 12 to get the remaining inches.
• Alternatively, divide cm by 2.54, then divide by 12: feeT = integer division; inches = remainder.

60 cm to feet and inches example

• 60 cm ÷ 30.48 = 1.9685 feet. Whole feet = 1.
• Remainder: 0.9685 × 12 ≈ 11.62 inches.
• So 60 cm = 1 foot 11.6 inches (Manuel’s Web).

The trade-off: online calculators are convenient, but understanding the math lets you double-check results and handle unusual fractions.

What Is the Exact Formula for ft and in to cm?

The formula is simple, but the numbers 30.48 and 2.54 come from an international agreement.

Derivation of 30.48 and 2.54

• 1 inch is defined as exactly 2.54 centimeters under the 1959 International Yard and Pound Agreement (SplashLearn (education publisher)).
• Since 1 foot = 12 inches, 1 foot = 12 × 2.54 = 30.48 cm.

Using the formula for any input

• Total cm = (feet × 30.48) + (inches × 2.54) (SplashLearn).
• The formula handles fractional inches too: multiply the fraction by 2.54 and add.
• For example, 5 feet 8½ inches = (5×30.48) + (8.5×2.54) = 152.4 + 21.59 = 173.99 cm.

The pattern: once you know the two constants, every conversion follows the same linear math. No lookup tables needed.

Why Accurate Height Conversion Matters

Small rounding errors can have real-world consequences.

Medical records

• BMI calculations require precise height in centimeters. A 2-inch error can shift your BMI category (Manuel’s Web (reference site)).
• Hospitals use metric for medication dosages that depend on body surface area.

Fitness tracking

• Smart scales and fitness apps often require height in cm for accurate body composition estimates (YouTube – Excel tutorial (tech channel)).

International travel forms

• Aviation, driving licenses, and visa applications in most countries require height in centimeters. The International Civil Aviation Organization (ICAO) uses cm for pilot height records.

The implication: accuracy isn’t just about numbers on a screen; it can affect your health metrics and official records.

What We Know for Sure vs. What’s Still Unclear

Confirmed facts

• 1 foot = 30.48 cm exactly (SplashLearn)
• 1 inch = 2.54 cm exactly (SplashLearn)
• Conversion formulas are linear and apply to any integer or fractional input (Manuel’s Web)

What’s unclear

• Why some countries (e.g., the U.S., U.K.) still predominantly use imperial for height despite metric adoption elsewhere.
• Historical variations in the inch before the 1959 agreement (e.g., the U.S. survey inch differed by about 2 parts per million).

Expert Perspectives on Height Conversion

“One inch is defined as exactly 2.54 centimeters under the international yard and pound agreement of 1959.”

— National Institute of Standards and Technology (NIST), the U.S. federal metrology authority

“Recording height in centimeters is essential for accurate growth monitoring and BMI calculations worldwide.”

— World Health Organization (WHO), global health agency

For anyone dealing with height data—whether for travel, fitness, or medical records—the choice is clear: use the exact conversion factors (30.48 and 2.54) and double-check your math against a reliable calculator. A single rounding error can misrepresent your height by over an inch, which matters when it appears on an official form or a medical chart.

Frequently asked questions