To measure volume accurately, match the tool to the job. In a lab, a volumetric flask or volumetric pipette gives one exact volume, a burette dispenses variable amounts, and a graduated cylinder is good to about 0.4 to 1 percent. At home, use liquid measuring cups and spoons. For solids, use water displacement.
Simply put, volume is the amount of space something takes up. For liquids, the SI unit you meet most is the liter (L) and its smaller relative, the milliliter (mL). In the US kitchen, however, you will see cups, fluid ounces, tablespoons and teaspoons instead. One milliliter is exactly one cubic centimeter (cc), so lab readings and solid-object volumes share the same scale.
Why Some Tools Measure Volume Better Than Others
Many tools can hold a liquid, but only some are made to measure it. Above all, the difference comes down to calibration. For example, a Class A volumetric flask is made and checked against a published tolerance, while a beaker’s printed lines are only a rough guide. As a result, two containers that both say “100 mL” can disagree by several milliliters.
In short: pick a volumetric flask or pipette when you need one exact amount, a burette when you need to dispense a variable amount precisely, a graduated cylinder for everyday lab work, and cups or spoons in the kitchen.
Fortunately, glassware makers publish their tolerances. For instance, a Kimble Class A 100 mL volumetric flask is listed at plus or minus 0.08 mL and meets the ASTM E288 Class A specification. Similarly, a University of Texas chemistry handout on the accuracy of laboratory glassware lists typical Class A tolerances for pipettes, burettes and graduated cylinders. As a result, those figures appear in the comparison table below.
First, try the converter to switch between lab and kitchen units. After that, you will find each tool explained, an accuracy table, and a step-by-step displacement method for solids.
Convert Units Before You Measure Volume
Enter an amount and pick its unit. The converter then shows the same volume in milliliters, liters, cubic centimeters, US fluid ounces, cups, tablespoons and teaspoons, using the exact US definitions.
Recommended Tools to Measure Volume
Overall, a small kit covers most jobs. For lab or school work, a Class A graduated cylinder set and one volumetric pipette handle nearly everything. In addition, a volumetric flask helps when you mix solutions. For the kitchen, a set of glass liquid measuring cups with clear markings is the best starting point. Because these picks are based on manufacturer specs and buyer reports, check each listing for its class and tolerance before you buy.
As an Amazon Associate, Measuring Expert earns from qualifying purchases.
Key Takeaways
- One milliliter equals one cubic centimeter, so liquid and solid volumes use the same scale.
- Volumetric flasks and volumetric pipettes are the most accurate, but each measures only one volume.
- Burettes dispense variable volumes to about 0.05 mL on a 50 mL Class A model.
- A 100 mL Class A graduated cylinder is typically good to about 0.4 mL.
- Beakers and Erlenmeyer flasks give estimates only; never use them for exact work.
- Kitchen cups and spoons are fine for cooking, though not for lab work or medicine.
- Finally, irregular solids are measured by water displacement in a graduated cylinder.
Lab Glassware That Can Measure Volume Precisely
To begin with, lab glassware comes in two accuracy grades. Class A is the tighter grade and is usually marked “A” on the glass. Class B allows wider errors; the UT Austin handout notes they are typically about twice the Class A values. Also, glassware is marked “TC” (to contain) or “TD” (to deliver). A TC flask holds the stated volume, while a TD pipette delivers it when drained.
Graduated cylinder
A graduated cylinder is a tall, narrow tube with a scale up the side. In fact, it is the everyday workhorse of school and research labs. Because the tube is narrow, a small change in volume moves the liquid level a visible distance, so readings are much better than in a beaker. Typical Class A tolerances are about 0.09 mL for a 10 mL cylinder, 0.25 mL for 50 mL and 0.4 mL for 100 mL. To read one, set it on a flat surface and look at the bottom of the curved surface (the meniscus) at eye level.
Volumetric flask
A volumetric flask has a round body, a long thin neck and a single ring mark. When filled to that ring, it contains one exact volume, such as 100 mL plus or minus 0.08 mL for Class A. Therefore, chemists use it to prepare solutions of known concentration. However, it cannot measure any other amount, so it is a “to contain” tool rather than a general measuring tool.
Volumetric and graduated pipettes
A volumetric (transfer) pipette delivers one fixed volume very accurately. Typical Class A tolerances are about 0.006 mL at 1 mL, 0.02 mL at 10 mL and 0.05 mL at 50 mL. A graduated (measuring) pipette, by contrast, has a scale along its length, so it can deliver different amounts, but with somewhat lower accuracy. Also, always fill pipettes with a bulb or pipette filler, never by mouth.
Burette
A burette is a long graduated tube with a stopcock at the bottom. Because of its stopcock, it lets you release liquid drop by drop and read exactly how much came out. That is why it is the standard tool for titrations. A 50 mL Class A burette is typically good to about 0.05 mL, and you read it to two decimal places by estimating between the 0.1 mL marks.
Beakers and Erlenmeyer flasks
Beakers and Erlenmeyer flasks often have printed volume lines. Even so, those lines are approximate, because the containers are wide and not calibrated to a tight standard. Instead, use them to hold, mix and heat liquids, or to estimate a volume roughly. For any number you plan to record, pour the liquid into a cylinder, pipette or burette instead. Our guide on whether you can measure volume with a beaker explains why.
Accuracy Compared: Which Tool Should You Use to Measure Volume?
Next, this table puts the main tools side by side. Lab tolerances are typical Class A values from the sources above; percentages are the tolerance divided by the capacity.
| Tool | Example size | Typical tolerance | As a percent | Best for |
|---|---|---|---|---|
| Volumetric flask (Class A) | 100 mL | ±0.08 mL | 0.08% | Making solutions of exact concentration |
| Burette (Class A) | 50 mL | ±0.05 mL | 0.1% | Titrations, variable precise delivery |
| Volumetric pipette (Class A) | 10 mL | ±0.02 mL | 0.2% | Transferring one exact volume |
| Graduated cylinder (Class A) | 100 mL | ±0.4 mL | 0.4% | General lab measuring, displacement |
| Graduated cylinder (Class A) | 10 mL | ±0.09 mL | 0.9% | Small volumes |
| Graduated pipette | 1 to 25 mL | Looser than a volumetric pipette | – | Small variable volumes |
| Beaker or Erlenmeyer flask | Any | Printed lines are approximate | Estimate only | Holding, mixing, heating |
| Kitchen measuring cup or spoon | 1 cup = 236.59 mL | Not specified to a lab standard | Estimate only | Cooking and baking |
Kitchen Tools to Measure Volume
Generally, home cooks rely on three tools. First, liquid measuring cups and jugs are clear, have a spout, and are marked below the rim, so you can fill to a line without spilling. Next, dry measuring cups are filled to the brim and leveled with a straight edge. Finally, measuring spoons handle small amounts of both liquids and dry ingredients.
In the US, the sizes are fixed by definition: 1 cup is 236.59 mL, 1 fluid ounce is 29.57 mL, 1 tablespoon is 14.79 mL and 1 teaspoon is 4.93 mL. However, nutrition labels round the spoons to 15 mL and 5 mL. If you need to convert a metric amount, see how much 30 mL is in spoons and ounces.
A kitchen scale does not measure volume; it measures mass. Still, it can stand in for a cup when a recipe gives grams. For water, 1 gram is about 1 mL, so a scale can also check a measuring jug. For flour or sugar, though, the weight of a cup depends on how the ingredient is packed.
How to Measure Volume of a Solid by Displacement
Regular shapes can be measured with a ruler (length x width x height for a box). For irregular objects such as a stone or a key, use water displacement instead. In other words, the method works because the object pushes aside exactly its own volume of water.
- Choose a cylinder. Pick a graduated cylinder wide enough for the object and small enough for good resolution.
- Add water. Fill it about halfway, or enough to cover the object fully.
- Record the first reading. Read the bottom of the meniscus at eye level, for example 50.0 mL.
- Lower the object in gently. Tilt the cylinder and let the object slide down so no water splashes out or cracks the glass.
- Check for bubbles. Tap the side lightly so trapped air escapes, because bubbles add false volume.
- Record the second reading. For example, the level rises to 62.5 mL.
- Subtract. The object’s volume is the difference: 62.5 – 50.0 = 12.5 mL, which is 12.5 cubic centimeters.
For objects too big for a cylinder, use an overflow (Eureka) can and catch the spilled water in a cylinder. Our full guide to measuring volume with the displacement method covers floating and porous objects. Gases need a different approach again, which we explain in how to measure the volume of a gas.
Volume vs Capacity vs Mass
Unfortunately, these three words get mixed up all the time. For clarity, the table below separates them.
| Term | What it means | Typical units | Measured with |
|---|---|---|---|
| Volume | Space an object or liquid takes up | mL, L, cm³, fl oz, cup | Cylinder, pipette, burette, ruler, displacement |
| Capacity | How much a container can hold | mL, L, gal | Filling the container and measuring the liquid |
| Mass | Amount of matter | g, kg, oz, lb | Scale or balance |
So a 250 mL beaker has a capacity of about 250 mL, but the volume of liquid inside it is whatever you poured in. Likewise, density links mass and volume: volume = mass / density.
Do and Don’t
Do
- Read at eye level, at the bottom of the meniscus.
- Pick the smallest tool that fits the sample.
- Use Class A glassware for recorded results.
- Let warm liquids cool to room temperature first.
- Rinse pipettes with the liquid you will measure.
Don’t
- Record beaker readings as exact values.
- Blow out a pipette unless it is marked for it.
- Heat volumetric flasks or pipettes.
- Pipette anything by mouth.
- Swap dry and liquid measuring cups in baking.
Honest Limits
Tolerances describe new, clean glassware used correctly at its calibration temperature, usually 20 degrees C. In practice, your own reading error is often larger than the tolerance. For instance, misreading a 100 mL cylinder by half a division costs more than its 0.4 mL tolerance. In addition, liquids expand as they warm, so hot solutions read high. Meanwhile, kitchen cups and spoons are not made to a lab standard at all, and how you fill and level them matters more than the cup itself. In short, the figures on this page tell you which tool can do the job, not how well a given person will use it.
When to Call a Professional
Of course, some work needs certified results. For example, regulated labs, pharmacies and quality-control teams must use calibrated glassware or pipettes with traceable certificates, and they recheck them on a schedule. If your results must stand up to an audit, send the equipment to an accredited calibration lab rather than checking it yourself. Likewise, for medicine, use the oral syringe or dosing cup that comes with the product and ask a pharmacist if you are unsure.
Measure Volume: Frequently Asked Questions
What tools measure volume most accurately?
Class A volumetric flasks, volumetric pipettes and burettes are the most accurate. A 100 mL Class A flask is good to about 0.08 mL.
What is the best tool to measure volume of a liquid in a lab?
For general work, use a graduated cylinder. If you need one exact volume, use a volumetric pipette or flask. For titrations, use a burette.
Can you measure volume with a beaker?
Only roughly. After all, beaker lines are approximate, so treat them as estimates and use a cylinder or pipette for recorded values.
How do you measure volume of an irregular solid?
Use water displacement. Read the water level in a graduated cylinder, add the object, read again, and subtract the two readings.
Is 1 mL the same as 1 cubic centimeter?
Yes. One milliliter is exactly one cubic centimeter (cc), so displacement results in mL convert directly to cm3.
What kitchen tools measure volume?
Liquid measuring cups and jugs, dry measuring cups, and measuring spoons. A US cup holds about 236.59 mL.
Does a kitchen scale measure volume?
No, a scale measures mass. For water, though, 1 gram is about 1 mL, so a scale can stand in for a jug.
What is the difference between Class A and Class B glassware?
Class A has tighter tolerances and is used for recorded results. Class B tolerances are typically about twice as wide.
Why do you read the bottom of the meniscus?
Because of surface tension, water curves up the glass walls. For this reason, glassware is calibrated to the bottom of that curve, read at eye level.
Which instrument measures a change in volume?
Specifically, a dilatometer tracks volume changes caused by heating or reactions. For simple jobs, a graduated cylinder reading before and after works.
The Bottom Line
To sum up, the right way to measure volume depends on how exact you need to be. Volumetric flasks, pipettes and burettes give the tightest results, while graduated cylinders handle everyday lab work well. Beakers and Erlenmeyer flasks, on the other hand, are for estimates only.
At home, liquid measuring cups and spoons do the job, and water displacement handles odd-shaped solids. Finally, use the converter at the top of this page whenever you need to switch between milliliters, cups and ounces.
6 thoughts on “What Tools Measure Volume? Lab Glassware, Kitchen Tools and Displacement”