# What weight is 1 oz in grams?

An ounce (oz) is a unit of weight commonly used in the United States and the United Kingdom. 1 oz equals 28.35 grams. Therefore, the weight of 1 oz in grams is 28.35 grams.

This conversion can be useful in cooking, jewelry making, shipping and other areas where weight needs to be precisely measured. Knowing the equivalent weights in different systems allows cooks to accurately follow recipes, jewelers to price materials, and shippers to calculate costs.

## Defining an Ounce

An ounce is ​1⁄16 of a pound. Under the avoirdupois system used in the U.S. and U.K., a pound is defined as 16 ounces. This makes an ounce equal to 437.5 grains.

The avoirdupois system is distinct from other ounce systems used for measuring precious metals like gold and silver. An ounce under the troy system is equal to 480 grains instead of 437.5 grains.

So in summary:

– 1 avoirdupois ounce = 28.35 grams
– 1 troy ounce = 31.1 grams

This article will focus on the avoirdupois ounce which is the common system used in day-to-day measuring.

## Origins and History of the Ounce

The word ounce comes from the Latin word uncia meaning “one-twelfth.” This reflects the origins of the ounce as ​1⁄12 of a Roman pound. Various ounce measurements derive from the Roman unit.

Over time, localized ounce standards developed in parts of Europe. The Troyes ounce used in France was equal to 43⁄4 modern grams while the Cologne ounce used in Germany was equal to 32⁄3 modern grams.

The avoirdupois ounce has its roots in the weight system used in London in the 1300s. It was equal to ​1⁄16 of a tower pound weighing 7,200 grains. Over the centuries, the pound was redefined but the ounce remained ​1⁄16 of a pound.

So the ounce has Ancient Roman origins but evolved into a distinct unit over hundreds of years. The modern avoirdupois ounce derives from a medieval London standard that became widely adopted in England and then the U.S.

## Converting Ounces to Grams

Metric units like grams offer key advantages of being far easier to convert between units. While complex conversion factors are needed to go between ounces and pounds, metric conversions are simplified by the consistent base-10 system.

To convert ounces to grams:

• 1 oz = 28.35 g
• 2 oz = 56.7 g
• 3 oz = 85.05 g

The conversion factor is simple to apply. Just multiply the number of ounces by 28.35 to get the equivalent number of grams.

Going the other direction, divide the number of grams by 28.35 to convert to ounces. For example:

• 28.35 g = 1 oz
• 56.7 g = 2 oz
• 85.05 g = 3 oz

This straightforward mathematical conversion allows seamless transition between the two units. The consistent 28.35 factor makes conversions easy.

## Converting Ounces to Grams in Cooking

In cooking, ounces and grams provide two distinct ways to measure ingredients. Many American recipes use ounces for volumes of liquids and weights of dry ingredients. European recipes predominantly use grams and other metric units.

Knowing ounce-gram conversions is essential for adapting recipes between the two systems. For example:

• 1 oz butter = 28 g butter
• 4 oz flour = 113 g flour
• 8 oz milk = 227 g milk

With the 28.35 conversion factor, cooks can seamlessly double recipes moving between ounces and grams. The weights translate accurately between the systems.

For simplicity, the rounded number of 28 g per ounce makes a good rule of thumb. The small 0.35 g difference has minimal effect in most recipes. Cooks can use 28 g and 30 g interchangeably with 1 oz for approximate conversions.

### Measuring Weights Accurately

Kitchen scales designed specifically for weighing food provide the greatest accuracy in grams. Many digital food scales switch easily between ounces and grams at the touch of a button.

For rough measurements, general bathroom and shipping scales work but may lack precision. Specialty jewelry scales finely calibrated in ounces and grams are also very accurate options.

Weighing ingredients directly provides the most precision compared to volume measures from cups and spoons. Cups can vary in size and how densely ingredients are packed. So grams and ounces provide the truest measurements.

## Pricing by Ounces and Grams

In retail and commerce, ounces and grams appear in product pricing for goods sold by weight. From produce to hardware items to precious metals, prices may be quoted in either or both units.

For example, unit pricing on bulk foods is commonly displayed in both dollars per ounce and dollars per gram. This allows easy cost comparisons between different package sizes. Shoppers can quickly calculate the best values.

For postal services and shipping companies, rates are also often based on weight in both ounces and grams. It is simple to convert between the two units to calculate costs.

Jewelry and precious metals priced by weight universally include both ounces and grams. This is because historically these goods were measured in troy ounces but today gram weights provide more precise jewelry pricing.

### Calculating Shipping Costs

Shipping carriers like USPS, UPS and FedEx base rates on total package weight. On their websites, inputting the weight in either ounces or grams will automatically provide the postage cost.

For example, a 3 oz package weighs 85 grams. A shipper can input “3 oz” or “85 g” when entering the weight and the shipping cost calculation will be the same. This simplifies shipping for both domestic and international orders.

## Switching Between Ounces and Grams in Science

In scientific applications, having weight values in both ounce and gram units available enables checks and balances in critical calculations. Dual reporting provides confirmation of the amounts.

For example, laboratory chemicals can have concentrations reported in percentage weight per ounce and also milligrams per gram. Or medication doses may be described both in ounces and cubic centimeters (cc).

Especially for chemicals measured in tiny amounts, grams provide finer precision than ounces. But having both units available helps catch any weighing or measuring errors.

### Reporting Weight Data

In scientific papers, research reports and academic articles, authors should provide weights in both imperial and metric units. Using ounces and grams together is the best practice for data transparency and clarity.

For example, insect weights could be written as “1.5 oz (42 g)” which confirms the measurement for readers familiar with either system. Similarly, liquid medication dosages could be listed as “0.3 oz (8.5 g).”

## Ounces and Grams in Jewelry

For precious metals and gemstones, jewelry is priced based on total weight, so seamless conversions between ounces and grams are essential. The jewelry industry universally uses:

– Ounces for identifying gold, silver and platinum weights
– Grams for determining stone weights as carat measures

This split approach provides the benefits of both systems. Ounces allow easy pricing per ounce for precious metals. Grams offer more precise measurement of gem weights as carat units down to decimal points.

### Pricing Gold and Silver

Gold and silver prices are almost always quoted in dollars per ounce. For example, a gold item weighing 1.5 oz made of 14k gold would be priced based on the current gold spot price x 1.5.

Being able to quickly convert between ounce and gram weights is critical for estimating jewelry values. A 35 g gold bracelet equals approximately 1.2 oz of gold based on the 28 g per ounce conversion.

### Weighing Gemstone Carats

Gemstones are priced per carat, which equals 1/5 gram. So a 1 carat diamond weighs 0.2 g. Jewelers universally use digital gram scales to precisely weigh gemstones down to the hundredth of a carat.

To put carat weights in ounces, divide the gram measurement by 28 then multiply by 5. For example, a 0.75 ct diamond would weigh 0.15 oz (0.75/5 = 0.15).

## Ounces and Grams for Postage and Shipping

For delivering packages and letters by mail or private carriers, postage rates and shipping fees are based on total weight. Ounces and grams provide two alternatives for measuring this weight.

USPS First Class Package rates up to 16 oz can be calculated easily in either ounces or grams at USPS.com. For example, a 5 oz package would be the same as a 140 g package for calculating postage.

FedEx and UPS also accept ounce or gram weights to determine shipping charges on their websites. Whether a customer inputs “3 oz” or “85 g”, the calculated cost is the same.

### International Shipping Calculations

For international mail and packages, grams are preferable since grams are the official postal weight standard worldwide. Ounces can still be used but involving fewer conversions lowers the chance for errors.

Calculating the dimensional weight for irregularly shaped packages should also be done in centimeters and grams for greatest accuracy on international shipments. This avoids discrepancies between inch/ounce and centimeter/gram measures.

## Cooking Conversions Between Ounces and Grams

In cooking, bakers and other recipe creators commonly use ounces for dry ingredient amounts and liquid volumes. Meanwhile grams and liters are standard for cookbook authors outside the U.S.

Having an ability to seamlessly convert between ounces and grams enables cooks to accurately adapt any recipe. A few examples:

– 1 cup flour = 5 oz flour = 140 g flour
– 1⁄2 cup heavy cream = 4 oz cream = 115 g cream
– 1 tbsp butter = 0.5 oz butter = 14 g butter

With the simple gram conversion, doubling or halving a recipe is easy math. Cooking experts should know ounce and gram equivalents by heart for recipe resizing and substituting ingredients.

### Using a Food Scale

For maximum precision in the kitchen, a digital food scale provides the best way to weigh ingredients for recipes. Dual displays allow users to toggle between ounces and grams with the touch of a button.

Gram weights avoid volume inconsistencies from packing densities or slight cup size variations. Food scales also help cleanly portion doughs, batters and meats without need for cups or spoons.

## Ounces and Grams for Diet Tracking

People following diets for health or fitness goals rely on accurately tracking the quantities of foods they eat. Ounces and grams provide two alternatives for measuring food weights.

Apps like MyFitnessPal allow users to log food amounts in either system. For the best precision, using a small diet scale weighs food directly in ounces or grams.

Some examples of weighs for common foods:

• Chicken breast – 4 oz / 115 g
• Apple – 5 oz / 140 g
• Cheese – 1.5 oz / 40 g

Knowing the approximate ounce equivalents for common items also helps when estimating weights. Even visually judging “1 oz cheese” or “3 oz meat” gives reasonable accuracy without a scale.

### Tracking Calories

The calories for any given food are the same whether the weight is measured in ounces or grams. The conversions between units have no effect on nutritional data like calories, protein, carbohydrates and fat.

So dieters tracking nutritional intake get the same calorie counts in apps like MyFitnessPal regardless of using ounces or grams for food weights. Both provide effective alternatives for monitoring diet goals.

## OEM Software Licensing Based on Ounces and Grams

Original equipment manufacturers (OEMs) selling pre-installed software on devices often structure license costs based on the device’s weight. Licensing fees are commonly set at a rate per ounce or gram.

This scales software costs appropriately for a given device’s size. For example, licensing Microsoft Windows for a laptop may cost \$0.40 per ounce. A 6 pound (96 oz) laptop would cost \$38.40 for the Windows license.

Converting between ounces and grams is simple. The fixed 28 g per oz ratio means pricing is identical in either system. A 20 gram smartphone would cost the same \$0.80 whether the rate is specified per ounce or gram.

### Volume Licensing

For large enterprise negotiations, converting between ounces and grams enables software licensing deals covering both imperial and metric units. Setting a single price per ounce and gram accommodates all device weights globally.

Having prices in both systems also provides a double check on proposed license costs. The totals calculated in ounces and grams should match based on the set conversion rate.

## Ordering Coffee and Espresso in Ounces and Grams

Coffeehouse menu boards typically list drink sizes in fluid ounces. However espresso shots are measured in grams. To order properly, baristas and customers must understand conversions between the two units.

A single shot of espresso is generally 25-30 grams. So a “double shot” would be 50-60 grams total. Common espresso drink volumes include:

• Single shot espresso – 30 mL / 1 fl oz
• Double shot espresso – 60 mL / 2 fl oz
• 12 oz latte – 2 shots espresso, 10 oz steamed milk
• 20 oz latte – 3 shots espresso, 17 oz steamed milk

The conversions allow baristas to make espresso drinks following standard recipes. Customers can also order sizes like “20 ounce quadruple shot latte” and receive the correct 4 shots of espresso.

### Weighing Espresso Grounds

To pull consistent espresso shots, baristas carefully weigh out coffee grounds in grams for each shot. Using scales calibrated in 0.1 g increments allows precisely dosing 18-22 grams per shot.

This precision is not possible with volume measures like tablespoons. Exact gram weights of coffee grounds are essential for high-quality espresso.

## Conclusion

In summary, 1 ounce (oz) equals 28.35 grams (g) of weight. This simple conversion allows easy translation between the two units.

Knowing the ounce-gram equivalency is useful in cooking, shipping, jewelry, science and other applications involving weights. Scales can reliably measure in either imperial or metric units.

With the set 28 g per oz ratio, calculations and conversions between ounces and grams are quick and convenient. Both provide valid alternatives for precisely measuring any item’s mass or weight.