Parkway Plastics Presents: The Ultimate Volume & Weight Conversion Guide

At Parkway Plastics, we know how crucial accurate volume and weight measurements are for industries using plastic containers, plastic jars, and other packaging solutions. Whether you're filling cosmetic jars, pharmaceutical containers, or organizing storage, our easy-to-use plastic jar size conversion guide helps you convert ounces (oz), grams (g), milliliters (mL), drams, and more - so you can focus on what matters most: quality packaging and efficient shipping.

Why Choose Parkway Plastics Containers for Your Packaging Needs?

Our premium plastic storage containers are engineered for precision, durability, and convenience - perfect for safely storing everything from small electronic parts to essential kitchen ingredients. We offer a wide range of plastic jar sizes with stackable designs that maximize your workspace and streamline organization.

• Plastic jars with secure lids: Keep contents fresh and safe.
• Stackable & space-saving: Maximize your storage.
• Combo packs: Jars neatly packed on lids for easy shipping and cost efficiency.
• Sizes from tiny 2 oz jars to larger containers ideal for any project.

What does a "2 oz jar" really mean?

If you're new to plastic packaging or your industry commonly uses different units like gram weight, milliliters, or drams, our plastic jar size conversion chart will be invaluable. Container sizes labeled in ounces might seem abstract, but with our comprehensive guide, you can easily measure jars by diameter or height and understand exactly how much each container holds.

Visit ParkwayJars.com to explore our full range of plastic jar sizes by diameter (mm) and volume (oz).

Popular sizes include:

1oz Jars - 2oz Jars - 3oz Jars - 4oz Jars - 6oz Jars -8oz Jars

Jar Volume & Weight Conversion Tables

We provide detailed conversion charts for:

• Ounces to grams (oz to g)

• Grams to ounces (g to oz)

• Ounces to milliliters (oz to mL)

• Milliliters to ounces (mL to oz)

• Ounces to drams and more

Trending : Plastic Jars Conversion Chart for easy reference in plastic jar packaging and plastic bottling.

Quick and Accurate volume conversions for Packaging Professionals:

Easily convert between drams, ounces, and milliliters (mL), essential for plastic and glass bottle manufacturing, cosmetic packaging, and pharmaceutical container design.

*Note: Some plastic storage containers listed here are approximated in volume.

Liquid Volume Unit Conversion Table

Equivalent liquid volume values for 1 dram, 1 ounce, 1 mL, 1cc, 1 liter, 1 pint, 1 quart, and 1 gallon (approximated)

This conversion table is indispensable for those managing liquid volumes in plastic jars and bottles.

Convert milliliters and cubic centiliters to ounces and drams:

Approximate equivalent (mL or CC) conversion to oz. Please note that these conversions are approximate. Understanding how to convert milliliters (mL) and cubic centimeters (CC) to ounces and drams can streamline your operations, whether you’re in a laboratory or kitchen. Here's a comprehensive breakdown to help you make these conversions with ease.

Converting Milliliters (mL) and Cubic Centimeters (cc) : Made Simple

Perfect for measuring liquids in plastic jars, bottles, or containers

1) One-to-One Conversion:

• Milliliters (mL) = Cubic Centimeters (cc or cm³)
• No math needed - 1 mL is exactly equal to 1 cc.

✅ Use it when: Whether you're filling a plastic container in a lab or pouring ingredients into a jar at home, this is a direct match.

2) Milliliters or Cubic Centimeters to Ounces (oz):

• Multiply the number of milliliters by 0.033814 to get the equivalent amount in ounces.
• Example: 10 mL x 0.033814 = 0.33814 oz

✅ Use it when: This helps when converting metric volume to ounces for packaging design, especially for plastic jars, cosmetic containers, or sample bottles.

 3) Cubic Centimeters to Ounces:

• The conversion is the same as milliliters since 1 mL = 1 CC.
• Example: 20 CC × 0.033814 = 67628 oz

✅ Use it when: Useful in plastic production where volume needs to be displayed in both metric and imperial units on containers.

 4) Milliliters or Cubic Centimeters to Drams (dr):

• Multiply the number of milliliters by 0.270512 to obtain the equivalent amount in drams.
• Example: 10 mL × 0.270512 = 2.70512 drams

✅ Use it when: Converting liquid volumes for pharmaceutical or cosmetic applications. It is particularly relevant for small glass vials or droppers.

 5) Cubic Centimeters to Drams:

• Since 1 mL equals 1 CC, use the same formula.
• Example: 30 CC × 0.270512 = 8.11536 drams

✅ Use it when: It is important for precise dosing in medical or cosmetic packaging. It will ensure accuracy in product labeling and compliance.

Practical Applications for Parkway Plastics Volume Conversions

Whether you're filling plastic jars, labeling containers for skincare, or prepping medical vials, accurate volume conversion ensures consistency and safety.

Laboratories: For exact chemical or biological mixtures in plastic containers.

Kitchen & DIY: Convert between metric and U.S. volumes easily

Pharmaceutical Packaging: Especially when labeling small plastic containers

Cosmetics: Essential when creating or labeling serums, lotions, or essential oils in plastic jars

✅ Bottom Line:

With these easy formulas and reference tips, you can confidently convert volumes no matter what kind of plastic jar or plastic container you’re working with.

Liquid Volume Conversion chart for Packaging Professionals

Understanding how to convert between different units of liquid volume is crucial in various scenarios, from scientific experiments to packaging design. Below are the conversions for common liquid volume measurements, essential for plastic and glass bottle manufacturing, cosmetic packaging, and pharmaceutical container design.

1. Dram

• Equivalent to:
• 3.7 mL
• 0.125 ounces
• 0.004 liters

✅ Application: Measuring small quantities in vials, ampoules, and sample containers.

2. Ounce (fl. oz.)

• Converts to:
• 30 mL
• 8 drams
• 0.03 liters

✅ Application: Commonly used in beverage bottles, cosmetic containers, and pharmaceutical packaging.

3. Milliliter (mL)

• Converted to:
• 0.271 drams
• 0.0338 ounces
• 0.001 liters

✅ Application: Standard unit for specifying volumes in plastic and glass containers, jars, and bottles.

4. Cubic Centimeter (cc or cm³)

• Equivalent to: 1 mL

✅ Application: Interchangeable with milliliters; used in mold design, fill volume specifications, and container capacity labeling.

5. Liter

• Converts to:
• 1000 mL
• 270.52 drams
• 33.815 ounces

✅ Application: Standard for larger volumes in bulk containers, storage bottles, and industrial packaging.

6. Pint

• Equal to:
• 475 mL
• 16 ounces
• 0.473 liters

✅ Application: Used in food packaging, beverage containers, and household product bottles.

7. Quart

• Converts to:
• 950 mL
• 32 ounces
• 0.946 liters

✅ Application: Suitable for liquid storage, cleaning products, and chemical containers.

8. Gallon

• Equivalent to:
• 3785 mL
• 128 ounces
• 3.785 liters

✅ Application: Common in bulk liquid packaging, industrial containers, and large-scale storage solutions.

Summary Table

These conversions can help you navigate various tasks with ease, ensuring you have the right measurements for your needs.

Understanding the Ounce and Other Units in Packaging

An ounce (oz.) is a unit from the English measurement system. It’s commonly used to express weight or volume, making it a versatile measure in many fields from cooking to bottle filling and packaging design.

Types of Ounces

1. Dry Ounce (Weight Ounce):

   • Used for measuring the weight of solid or dry materials (e.g. flour, sugar, powdered additives).
   • One dry ounce ≈ 28.35 grams.

   ✅ Application: In bottle and jar manufacturing, this is relevant when calculating the weight of plastic resin, glass cullet, or additive materials.

2. Fluid Ounce (fl. oz.):

   • Used to measure liquid volume like beverages, cleaners, oils, etc.
   • One fluid ounce ≈ 29.6 milliliters (≈ 1/8 cup).

   ✅ Application:  In packaging, whether for plastic bottles, glass jars, or cosmetic vials. Fluid ounces help define fill volumes, label specifications, and dose sizes.

Understanding this difference between ounces as weight vs. fluid ounces as volume is key in packaging work. For instance, a bottle’s fill capacity is given in fluid ounces (or mL), while the material weight (plastic, glass wall thickness) is often designed in grams or dry ounces.

What is a Milliliter and Why It Matters for Plastic Containers?

A milliliter (mL) is a metric unit of volume used to measure liquids. It represents one‑thousandth of a liter, making it ideal for small volumes in bottles, jars, vials, and plastic containers.

A milliliter (mL) is a metric unit of liquid volume:

• 1 mL = 1/1000 of a liter.
• Equivalent to 1 cubic centimeter (cc or cm³).

This means a milliliter is exactly the same volume as a tiny cube with 1 cm sides is a useful equivalence when you’re designing molds, specifying fill volumes, or determining container capacity.

What is a Dram and Its Use in Packaging??

A dram (often abbreviated as “fl. Dr.”) comes from the old English apothecary / pharmacy system. It is a unit of liquid volume, historically used for measuring small medicinal doses.

Quick Facts about a Dram:

• Unit of Measurement: Liquid volume
• Equivalent to: 1/8 ounce
• Exact Conversion: Approximately 3.697 milliliters

Although drams are less common today, you might still encounter them in pharmaceutical packaging or perfume sample design. It retains roots in older systems for dispensing medicinal or cosmetic liquids in small vials, ampoules, or dropper bottles.

Understanding the Definition of a Drop - Why it can Vary

A drop is often thought of as a small portion of liquid released one at a time (for example from a dropper or pipette). In industries like cosmetics, pharmaceuticals, or bottle and jar packaging, drop measurements can be practical -but also inconsistent if not standardized.

What Defines a Drop?

• In many pharmaceutical standards, a standard drop is taken as 0.05 milliliters (mL).
• Since 1 mL = 1 cc, that means 1 drop is often assumed to be 0.05 cc (cubic centimeters).
• However, in practice, the size of a drop is not fixed - it depends on many factors.

Factors Influencing Drop Size

1. Thickness of the Liquid: Viscous oils produce larger drops compared to thinner liquids like water.
2. Dropper Size: The dimensions of the dropper's tio can alter the size of the drop. A larger orifice results in larger drops.
3. Application Method: The angle and force used when dispensing can also affect the drop size. 

By accounting for these elements, you can achieve more accurate measurements in your specific context.

Why this matters in Packaging & Containers? 

In plastic or glass bottles, vials, ampoules, cosmetic droppers, or pharmaceutical containers, using drops as a measure can be risky unless your dropper, liquid, and conditions are well controlled. For consistent results, many manufacturers prefer giving exact mL or cc values rather than relying on “drops” or at least calibrating the drop definition for that particular system.

What is a Gram?

The dictionary defines “gram” as: gram / noun - a metric unit of mass equal to one thousandth of a kilogram.

A gram (symbol: g) is a metric unit used to measure mass that is, how much matter is in an object. Originally, one gram was defined as the mass of one cubic centimeter of pure water at about 3.98 °C, but today it is formally defined as 1/1000 of a kilogram.

A milligram (mg) is one‑thousandth of a gram (0.001 g). A gram is about:

• a quarter teaspoon of sugar

• a cubic centimeter (1 cc) of water

• the weight of a paperclip

• the weight of a pen cap

• a thumbtack

• a pinch of salt

• a piece of gum

• the weight of a single U.S. bill

Common conversions involving Grams:

• Ounce to grams: 1 oz ≈ 28.3495 g

• Pound to grams: 1 lb ≈ 453.592 g

• Kilogram to grams: 1 kg = 1,000 g

• Cup to grams (approx): 1 cup ≈ 340 g (varies with substance)

• Tablespoon to grams (approx): 1 tbsp ≈ 14.3 g

• Quarter pound to grams: ≈ 113.3981 g

Plastics & Containers for Storage, Bottling & Packaging

Plastic Containers for Storage

Our durable plastic jars and plastic containers are ideal for storing a wide variety of items - from small electronics and musical parts to screws, nails, office supplies, art supplies, and more. They’re built to last, resist impact, and stay clear for visibility of contents.

Plastic Containers with Lids

We offer combo packs with plastic containers with lids shipped together in a single box. This saves packaging space, protects lids during transit, and improves cost efficiency for your bottling or storage lines.

Our Core Products

Here are the relevant terms and phrases that describe our offerings and domain:

• plastics containers
• plastic containers for storage
• plastic containers with lids
• plastics containers manufacturers
• plastics containers food
• plastics containers for storage
• plastics containers box
• parkway plastics containers 
• easy plastic containers
• stackable plastic containers
• plastic containers or jars
• glass jars
• plastic bottling
• bottles glass
• jars glass
• plastic container
• plastic containers
• plastics jars
• plastic jar
• plastic jars lids
• jars plastic
• plastic jars
• plastic tubs
• plastic jars with lid
• small plastic containers
• plastic jar
• 2 oz jar

Frequently Asked Questions (FAQ)

Q1: How do I convert plastic jar sizes from ounces to milliliters or grams?
A: To convert plastic container sizes, multiply ounces by 29.57 for milliliters, or by 28.35 for grams. Parkway Plastics offers a complete plastic jar size conversion chart to help customers in cosmetic packaging, pharmaceutical packaging, and plastic product manufacturing calculate accurate fill volumes.

Q2: What types of plastic jars does Parkway Plastics manufacture?
A: Parkway Plastics is a U.S.-based plastic packaging manufacturer specializing in custom plastic jars, wide-mouth containers, and stackable plastic jars with lids. We produce containers in sizes from 1 oz to 32 oz, perfect for industries like beauty, medical, and food packaging.

Q3: How do I select the right plastic container for my product line?
A: Start by identifying your product's volume (in mL or oz) and whether you need airtight plastic containers, food-safe jars, or UV-resistant packaging. Parkway Plastics provides a full line of durable plastic packaging containers ideal for lotions, supplements, or dry goods.

Q4: Do your plastic containers come with lids?
A: Yes. Parkway Plastics offers plastic jars with matching lids in both individual and combo pack formats for cost-effective packaging and shipping. All containers are manufactured with precision to ensure proper sealing and freshness.

Q5: What industries commonly use Parkway Plastics containers?
A: Our custom plastic containers are used across industries such as cosmetics, pharmaceuticals, nutraceuticals, cannabis packaging, laboratory supplies, and general storage applications. Whether you're a manufacturer or private label brand, our containers fit your needs.

Q6: Why is it important to use conversion charts in plastic packaging?
A: Accurate volume and weight conversion ensures that your product fits perfectly into the jar or bottle, avoiding overfilling or underfilling. This is critical for regulatory compliance, label accuracy, and cost control in plastic container manufacturing.

Q7: What is a dram and how is it used in plastic packaging?
A: A dram equals about 3.7 mL and is used to measure small quantities in pharmaceutical bottles, essential oil vials, and dropper containers. Parkway Plastics includes dram equivalents in our conversion charts for accurate dose packaging.

Q8: Does Parkway Plastics support bulk or wholesale orders?
A: Yes! We offer bulk plastic jar purchasing, wholesale pricing, and custom manufacturing for large orders. Whether you need thousands of 2 oz plastic jars, 4 oz wide-mouth containers, or custom-colored jars, we can deliver.

Q9: Are Parkway Plastics containers eco-friendly or recyclable?
A: Many of our plastic containers are made from recyclable materials such as PP and PET plastics, suitable for sustainable packaging initiatives. Parkway Plastics supports eco-conscious product lines looking for recyclable plastic jars.