Last Updated on November 26, 2025
Forklifts are must-have industry solutions for moving heavy materials like lumber, pallets of product and more. They can improve productivity, provide more safe operations for workers and keep your project running smoothly.
However, each forklift has limitations on the amount of weight it can lift and how high it can carry — or place — a load.
If you’re a forklift operator, you need to have a clear understanding of your machine’s load capacity to prevent costly damage or accidents. With this guide you will learn all about forklift capacity and how it affects your work.
What Is Forklift Capacity?
Forklift capacity is the maximum weight a forklift can safely carry at its load center. Forklift capacity is also known as load capacity.
- Load center is the horizontal distance from the vertical face of the forks to the load’s center of gravity.
A forklift won’t be able to carry as much weight without tipping if a load is not centered correctly. This means the forklift’s capacity is reduced.
For example, a 48-inch by 48-inch pallet’s center of gravity is in the middle of the pallet, or 24 inches from the edge. This means the forklift’s load center is also 24 inches from the face of the forks.
Forklift Load Capacity Chart
Forklifts are often categorized by their load capacity: standard-, mid- and high-capacity. For example, internal combustion forklifts often have the highest load capacity, while many electric forklifts are considered standard-capacity.
Why Is Understanding Load Capacity Important?
As an operator, it’s your responsibility to understand what your machine can and can’t do. If you fail to learn what your machine can do, you risk damaging equipment and — worse yet — harming yourself and others on the jobsite.
- Read More: 3 Things to Know When Renting a Forklift
Every forklift has limitations on how much weight it can carry and how high it can lift a load. Additionally, forklift attachments or unbalanced loads can reduce the load capacity.
If you don’t understand the machine’s load capacity, you run the risk of overloading the machine or trying to move an unbalanced load. This can result in tip overs, spills and other costly and dangerous accidents.
Luckily, all forklifts are required to have a clearly visible data plate to help you understand its capacity.
How Do You Know the Capacity of Your Forklift? Read the Data Plate
Every forklift must have a data plate. The data plate is usually located on the instrument panel near the operating controls, but it may also be on the hood or near the seat.
Look at the data plate to find important information about the forklift, including its load capacity. The plate will tell you how much weight the forklift can safely lift at different mast angles or when the forklift is fitted with an attachment.
Where to Find Load Capacity Information
Every data plate should have forklift diagrams and a capacity chart that tells you about the load capacity at different load centers.
Look at the Forklift Diagrams and Capacity Chart: These diagrams help you understand the function of your rented forklift. The labels on the diagram correspond to the columns of the chart.
- Column A (Horizontal Load Center): Columna A (above on the left) shows how far the center of the load is from the load’s back rest. This distance is listed in Column A of the chart. Column A tells you the load center used in calculating the forklift rated capacity (right column).
- You must have a data plate that matches half the length of the forks. The only exception is if the length is 42 inches or shorter. Use a 24-inch load center for these.
- Label B/Column B (Vertical Load Center): This tells you how high off the forks the load’s center of gravity is.
- Note how pushing the load center out 6 inches (24- to 30-inches) on this machine reduces its overall rated operating capacity by 550 pounds.
- Label C/Column C: This is the maximum fork height of the mast. In this example, it’s 189 inches. This is the height where the load is the least stable.
- Label D/Column D: This tells you the maximum distance forks can be offset. When not square, calculations are made to adjust the rated operating capacity. This adjustment, if applicable, will be noted in Column D for the specific application.
Information That Indicates Reduced (De-Rated) Capacity
Let’s take another look at the example data plate. This is a data plate from a 5,000-pound capacity model. However, on this specific machine, the maximum capacity is only 4,500 pounds. How can that be?
Options — such as the mast type, attachments and tires — can all reduce the forklift’s capacity.
For example, this forklift includes optional features that reduce the overall capacity:
- Mast Type: FSV mast is heavier than standard mast. Other forklifts may have different mast types, including 2-stage (F or FV), 3-stage (FSV) and 4-stage (Quad) that vary depending on specific forklift model.
- Attachments: Attachments affect the forklift rated capacity, making it less stable. The side shifter attachment shown here adds weight and pushes the load backrest further away from the forklift. Plus, side shifting moves the load left and right (off center or balance).
- If an attachment is not called out on a data plate, that attachment cannot be used on the equipment. Forks are the exception. Forks will not be called out in the “Attach” box.
- Tire Size: This area shows the size and type of tires. “Solid” means a solid pneumatic tire. A cushion type tire will indicate “smooth” or “treaded.” Tire size can affect rated operating capacity and is important when calculating ground pressure as solid tires will give less under a heavy load.
Other Important Information
In addition to the forklift’s load capacity, the data plate will also give you information that will help you optimize your operation.
- Model and Serial Numbers: These are important for technician communication, relaying information about repair, technical issues and so on.
- Back Tilt: This number represents how many degrees backward the mast can tilt to help keep loads on the forks securely. In this example, it’s 6 degrees.
- Type (Fuel Type): In this example, the forklift uses gas or liquid propane (G/LP). Other types include (E) electricity, (DS) diesel and (CNG) compressed natural gas.
- Front Tread: The front tread of a forklift is equivalent to its overall width. This helps you understand how much space the forklift will take up on the project site.
- Truck Weight: This is the overall weight of the forklift (without a load). This is important information when transporting the forklift.
5 Forklift Safety Tips for Managing Load Capacity
1. Get Certified and Inspect Your Forklift
In the United States and Canada, all forklift operators must be fully trained and certified. Operator safety training will teach you how to operate the forklift safely to improve the equipment’s efficiency and prevent serious injury or accidents.
- OSHA Forklift eTool: Training Assistance
If renting a forklift, check with the rental company to see if they offer training and certification, or get certified with a Herc Rentals Training Course.
In addition to getting certified, inspect the forklift before each use. Make sure the data plate is visible and accurate. Also, fix any damage before operating the machine.
2. Factor in the Weight of Any Attachment
Always choose a forklift with a larger load capacity than what you need to lift, including the weight of any attachments.
Adding an attachment reduces the lifting capacity of the forklift due to the weight of the attachment itself and because an attachment typically moves the load center forward.
As the center of gravity moves forward, the maximum load weight must decrease to prevent tip overs. That’s why it’s important for forklifts to have rated and de-rated capacities.
- De-rated capacity: A term that describes the decrease in a forklift’s capacity. For example, the data plate above showed a de-rated capacity of 4,500 pounds on a 5,000-pound capacity model.
When you rent a forklift, make sure you know the de-rated capacity of the forklift when an attachment is fitted. Then, speak with your rental provider and check the data plate before adding an attachment.
3. Keep the Load Centered
Refer to the data plate diagrams and capacity chart to find your forklift’s load center. When adding materials onto the forklift, be sure to center the load. If the materials you need to move will exceed the stated load center, then reduce the weight of the load and make multiple trips.
When driving, always drive with the heaviest end upslope. If you need to move materials downhill, you may need to reduce the load or adjust the route to prevent tip overs.
4. Don’t Lift the Maximum Weight Too Often, and Never Exceed It
When choosing a forklift, know how much you need to carry and how often. A forklift’s efficiency is directly linked to how you plan on using its lifting power.
For example, if your load capacity is rated for 4,000 pounds, that is the most you can safely lift. You should never exceed the maximum capacity for the load center.
Additionally, if you’re constantly lifting the maximum weight, you’ll be putting a lot of stress and energy on the machine. It’s best to choose a forklift with a greater load capacity than you’ll need.
5. Adjust the Load to Account for Lift Height
How high you need to lift the load will also affect the load capacity. The higher you lift, the lower the load capacity.
A forklift with a high mast may have greater capacity at lower lift heights. These forklifts may have a dual capacity rating, with lower capacity at the maximum lift height and higher capacity at low heights.
Find the Right Forklift at Herc Rentals
At Herc Rentals, we understand that every project is different. Our knowledgeable team can guide you in choosing the right forklift for your next material-handling project. By partnering with us, you’ll have access to top notch equipment with ample load capacity and the latest technology. Plus, our operator safety training and delivery services will help optimize your operation and maintain a safe workplace.
Browse our wide selection of material handling solutions, including electric forklifts, IC forklifts, rough terrain forklifts and forklift attachments. Or, call 1-800-432-6215 to discuss options with an equipment expert today.
