10 Feet Is How Many Inches – A foot (abbreviated “ft”) is a unit of length in the American customary and imperial measurement systems. International agreement defines these two units as 12 inches, and in both systems a foot equals 12 inches and a yard consists of 3 feet.
Historically, “feet” was part of many systems of units of measurement, including the British, French, Chinese, Roman, and Greek systems. Leg lengths vary from place to place and are subdivided into 16 digits or 12 inches. The United States is the only industrialized country that uses international feet instead of meters.
10 Feet Is How Many Inches
Previously, the basis of measurement was determined by the human foot. In fact, the foot length of white men is about 15.3 percent of their height, which means that a man who is 5 feet 3 inches has a foot length of about 9.65 inches. Thus, these figures have changed over time, showing that the unit “foot” is synonymous with actual human shoes. Archaeologists point out that the Mesopotamians, Indians, and Egyptians used cubits, while the Greeks and Romans used feet. For the Egyptians, 16 digits or 4 palms equaled one foot. During the Bronze Age, the foot length used by most Indus towns was about 13.2 inches.
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The typical Roman foot was about 11.64 inches long, about 97% of the measurements used today, but in the provinces people used the Nero Drusus foot (about 13.15 inches long). The Romans originally divided the foot into 16 toes, and later divided them into 12 toes
(this means imperial ounces or inches). Jacob Koebel describes the process of foot verification in the 16th century.
The International Pounds and Yards Agreement of July 1959 defined the international foot as 12 inches, which is 1.7 ppm (parts per million) shorter than the original British definition and 2 ppm shorter than the original US definition. In the United States, 1 foot is considered to be 12 inches to 1 inch, and as defined by the Mendenhall Order of 1893, a meter equals 39.37 inches.
12 is the standard number for the 12-hour clock, there are 12 months in a year, and 1 foot is 12 inches. But why use 12 instead of 10?
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Not all nations historically had a 12-hour clock; in fact, the Egyptians were the only people to have 12 hours of night, 2 hours of twilight, and 10 hours of day. So, there are 10 hours of day, 2 hours of twilight, and 12 hours of night and day.
There has been a lot of speculation as to why they have base twelve instead of ten, and this has influenced different cultures over time. One of the schools of thought states that our fingers have three joints, and if we use our thumbs to count the joints, our hands have twelve joints, and that’s how they’re counted.
The Babylonians developed a numbering system called sexagesimal, with base 60. Sexagesimal is used to calculate time and has 12 factors. Also, 12 has more factors than 10, making it easier to divide. A number system of 12 was used by many cultures, including the Romans, who introduced the concept of 12-inch feet. In the US, distances are still mostly measured. Use inches and feet – inches add up to feet add up to yards add up to a mile. These are called imperial units. The more common way to measure distances on Earth is using the metric system—millimeters add up to centimeters, and meters add up to kilometers.
One of the challenges with inches and feet is that they can be difficult to add. Can you quickly increase from 3-3/8” to 4-5/16”? maybe not. The same challenge exists for field altitudes. Can you stand at an altitude of 723.53, measure 6′-7 5/8″ with a tape measure, and quickly convert that height to a fractional height above where you’re standing? Maybe, maybe not.
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A lost art of mind transformation? As I sit here writing this, I wonder if I am explaining a lost and forgotten art. The art is converting measurements from inches to decimal feet. It’s so easy to do math with your phone, heck, there might be an app that does it for you. However, we old-school poets can still do it in our heads (we are the same generation who know how to divide and write cursive script).
How to learn to convert inches to decimals. It’s definitely not rocket science. There are three simple steps in my mind:
The process isn’t difficult, but it does take practice. If you learn it, it will serve you well throughout your architectural career.
Use this handy chart to help you get started! Below are some additional tools that can assist you as you read plans, printouts and diagrams. Add or subtract lengths in inches (decimal or fractional), feet, centimeters, and millimeters. Enter the equation exactly as you would write it on paper, eg 4′ 3 7/8″ + 5 cm.
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Joe is the creator of Inch Calculator with over 20 years of experience in engineering and construction. He holds multiple degrees and certificates.
Ethan has a PhD in Astrophysics and is currently a Satellite Imaging Scientist. He specializes in mathematics, science and astrophysics.
Feet and inches may seem complicated, but adding and subtracting measurements is actually pretty easy if you follow a few simple steps. While adding or subtracting feet and inches is easy with the measurement calculator above, if you follow a few basic steps, you can do it yourself!
The first thing to do when adding, subtracting, or doing other math operations on inches, feet, and other measurements is to convert all measurements to common units of measurement. For example, when reading a tape measure, inches will be expressed as fractions.
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Let’s say we want to do a calculation using inches as the unit of measurement. Convert any decimal inches to decimals first. Then convert any measurement to inches in feet, centimeters, millimeters, and more.
Convert any fraction of inches to decimal form by dividing the numerator of the fraction by the denominator, using a calculator if necessary. If the fraction is an integer, it is added to the converted decimal value.
For example, if our measurement is 2 1/2 inches, first convert 1/2 to a decimal, which is 0.5, and then add it to 2 for a total of 2.5 inches.
You can also use the Inch Fraction Calculator to quickly find fractional values in inch fractions.
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Convert any feet to inches by multiplying the number of feet by 12, since there are 12 inches in a foot. Using a feet to inches conversion calculator can also simplify this step.
All measurements are now displayed in decimal inches and you can add or subtract them as usual and use the calculator as needed. The end result is a length in inches; at this point you can convert the result to any other unit.
The chart below simplifies the process of adding and subtracting decimal inch values and may be faster than using a calculator.
A table showing sums of common fractions of inches. Add a score from the top header and the first column; is the sum of their intersection.
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A table showing common fractional differences in inches. Subtract part of the top header from the first column; the difference is where they intersect.
Now that we’ve covered the basics of adding distance measurements, we hope you can use the above steps with confidence. Learn more about how to add feet and inches with our in-depth guide.
The steps to add or divide feet and inches are similar to the addition and subtraction steps above.
The first step in multiplying or dividing multiple measurements is to convert the length measurements to the same unit of measurement and then convert them to decimal values. If lengths are measured in feet and inches, it may be easier to convert to inches.
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After converting the length value to decimal, it can now be multiplied or divided like any decimal number. For example, if your inches value is 1.25 and you need to multiply by 2, you simply multiply by 1.25 × 2 = 2.5.
For example, if you need to multiply two measurements to calculate an area, make sure to update the units to square units. For example, 2.5 inches × 4 inches = 10 inches
A table showing the multiplication of common fractions in inches. Multiply the score in the first column by the value of the top header; the result is that they intersect.
A table showing some common fractions of inches. Divides the score in the first column by the value of the top header; the result is that they intersect.
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Feet are expressed as “ft”. or a star, such as 5 feet or 5′. Inches are denoted as “i”. or double star, such as 5 inches or 5 inches.
To manually calculate inches from feet, first, convert any decimal feet
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