1 Inch = 2.54 Centimeters 

Length inches to centimeters conversion table contains the most converted values. You may use this conversion table if you are converting between inch and centimeter for values listed in the table below.

Inches – Centimeters

1 Inches = 2.54 Centimeters
5 Inches = 12.7 Centimeters
10 Inches = 25.4 Centimeters
15 Inches = 38.1 Centimeters
20 Inches = 50.8 Centimeters
50 Inches = 127 Centimeters
100 Inches = 254 Centimeters
200 Inches = 508 Centimeters
500 Inches = 1270 Centimeters
1000 Inches = 2540 Centimeters

As a rule of thumb it is 2 1/2 cm to one inch. Funny, that expression – a rule of thumb. It actually comes from the measurement of an inch.The nail joint of the average person’s thumb is about an inch long, so measuring quickly one would use their thumb to measure and this was termed a thumb rule, or a ruler made by using the thumb joint. This has since become known as a rule of thumb, equating to a good approximation – one that will do for rough measurements.

In 1959 the United States and countries of the Commonwealth of Nations defined the length of the international yard to be exactly 0.9144 meters. Consequently, the international inch is defined to be exactly 25.4 millimeters. The metre itself has been defined and re-defined with different approaches over time, and is currently (since 1983) defined in terms of the speed of light. Specifically, it is defined as 1⁄299,792,458 of a light-second, meaning that the speed of light comes out to exactly 299,792,458 metres per second. (But note that the metre is defined in terms of the speed of light, not vice versa.) Each definition has tried to match the previous one as closely as possible—just taking a different approach to doing it—so the changes have not affected the practical use of the unit.

So simply answering the How Many Centimeters Are In an Inch question, 2.54 centimeters are in an inch!

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3 teaspoons is 1 tablespoon.
8 ounces is 1 cup.
16 ounces is 2 cups which is 1 pint.
32 ounces is 4 cups which is 2 pints which is 1 quart.
128 ounces is 16 cups which is 8 pints which is 4 quarts which is 1 gallon.

The fact that there are 16 fluid ounces (oz.) in a pint (8 oz. to the cup) and 16 dry oz. to the pound leads to all sorts of confusion and mistakes in recipes. Further, it is quite common for recipes to specify an amount of a dry substance in liquid units: a cup of chopped onions, a half cup of diced celery, etc. This is done because we typically don’t keep scales in our kitchens, but we do have measuring cups. Where this really becomes problematic is with measuring flour. The actual amount of flour in a measuring vessel will vary widely depending upon how loose or compact it is.

Ounce Equivalents and Conversions

There are 8 fluid ounces in a liquid measuring cup.
There are 16 ounces (dry) in one pound.

To avoid the confusion (Liquid vs. Dry measurements), it’s easier to think of liquid as a VOLUME measurement. This is the standard as to much of the US Industry uses when expressing ounces (liquid), cups, quarts, gallons, etc. For example, we do not think of buying 10 lbs of whole milk or 2 quarts of dry rice. Most folks are trying to double or triple a recipe and start with the same question: “How many ounces are in a cup and in a pound?” To avoid this confusion:
1. Buy an electronic food scale (Target, Sears, Wal-Mart) that weighs in both ounces and in grams.
2. Set the scale to grams.
3. Measure each ingredient out on the scale.
4. Write down the gram conversions.
5. Multiply the smallest weight by the number of batches needed to be made.
6. Multiply the other ingredients accordingly.

In a final note. Most dry containers express weights in grams and liquid containers are also expressed in liters.

• The ounces to cup conversion works for water and fluids with a high water content. This conversion will not work for “dry” goods such as flour, sugar, etc. or for chopped vegetables.
• 8 ounces in a cup and 16 in a pound, but they measure different things. A cup is measured by volume and a pound by weight. So you can’t be sure that two cups of, say, flour, weigh a pound. In fact, they don’t.
• Only to mention that there are 20 ounces in a British pint, in case someone in the U.K. is using a measuring vessel marked in pints and halfs.

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2. How Many Centimeters Are In an Inch
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If you meant gallon (United States liquid unit equal to 4 quarts or 3.785 liters):
There are 3.78 liters in a US gallon, so to convert a value in US gallons to liters, multiply by 3.78.
If you meant gallon (the British imperial capacity measure (liquid or dry) equal to 4.545 liters):
There are 4.54 liters in a gallon, so to convert a value in gallons to liters, multiply by 4.54.

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