When you pick up a dumbbell, are dumbbells the weight on each side? This is a very common point of confusion for beginners. The simple answer is no. A single dumbbell represents the total weight for that implement, not a weight to be added per side.
Understanding this is fundamental to your safety and progress. Using the wrong weight can lead to ineffective workouts or even injury. This guide will clear up all the confusion and explain exactly how dumbbell weights work.
We will cover how to read dumbbell labels, the difference between fixed and adjustable types, and how to choose the right weight for your goals. Let’s get started.
Are Dumbbells The Weight On Each Side
This question is so frequent it deserves its own clear section. The weight stamped or labeled on a dumbbell is its total weight. A 20-pound dumbbell weighs 20 pounds in total. The weight is not per side or per end.
This total weight includes the entire unit: the bar or handle and the weight plates or fixed ends attached to it. When you perform a bicep curl with a 20-pound dumbbell, you are curling 20 pounds, not 40.
Confusion often arises from comparing dumbbells to barbells. With a barbell, you add plates to each side of a central bar. The total weight is the bar plus all plates. Dumbbells are a complete, self-contained unit.
How To Read Dumbbell Weight Markings
Manufacturers mark the total weight on the dumbbell itself. You can usually find the number engraved, stamped, or printed on the end of the weight or along the handle.
- Look for a number followed by “lb” for pounds or “kg” for kilograms.
- On hex dumbbells, the weight is often on the flat end of the hexagon.
- On adjustable dumbbells, the selector dial or display will show the total weight you have set.
- If no marking is visible, the weight may be cast into the iron in raised numbers.
If you are ever unsure, you can always use a scale. Place the dumbbell on a bathroom or luggage scale to confirm its total weight. This is a good practice for old or unmarked equipment.
Common Misconceptions About Dumbbell Weight
Many new lifters make assumptions that can throw off their training. Let’s correct a few.
- Myth: A pair of 15lb dumbbells means you’re lifting 30lbs total per exercise. Truth: If you are doing a two-arm exercise, like a goblet squat with one 15lb dumbbell, you are lifting 15lbs. If you are doing bicep curls with a 15lb dumbbell in each hand, you are lifting 15lbs per arm, but the implement itself is still 15lbs total.
- Myth: The weight listed online is per side. Truth: Retailers always list the total weight of the single dumbbell. A product titled “25lb Dumbbell” is one dumbbell weighing 25 pounds.
- Myth: Adjustable dumbbell plates add their weight per side. Truth: If you add two 10lb plates to an adjustable dumbbell handle, the total weight is the handle’s weight plus 20lbs (10lbs on each side). The total is still for the single unit.
Types Of Dumbbells And How Their Weight Works
Not all dumbbells are created equal. The way the weight is configured can vary, but the principle remains: the number is the total.
Fixed Weight Dumbbells
These are the classic, solid dumbbells you see in most gyms. They are a single piece of cast iron or coated concrete with a handle in the middle.
- Examples: Hex dumbbells, round vinyl dumbbells, pro-style chrome dumbbells.
- Weight Clarity: The weight is fixed and permanently attached. A 30lb hex dumbbell is always 30lbs total.
- Advantage: Very durable and quick to grab and use.
Adjustable Dumbbells
These consist of a bar or handle where you can add or remove weight plates. They are space-efficient for home gyms.
- A standard adjustable dumbbell has a central handle, collars, and separate plates.
- You add plates to both ends to balance the dumbbell.
- The total weight is the weight of the handle plus the weight of all plates on both ends.
- For example, a 5lb handle with two 10lb plates (one on each side) creates a 25lb total dumbbell (5 + 10 + 10).
Selectorized Adjustable Dumbbells
These are high-tech versions like Bowflex or NordicTrack. You turn a dial to select a weight, and internal mechanisms lock the appropriate amount of weight plates to the handle.
- The number you select on the dial (e.g., 25) is the total weight of that single dumbbell.
- It is not 25 pounds per side; it’s 25 pounds for the entire assembly you pick up.
- This is the most common source of the “per side” confusion, but the rule still applies.
Loadable Dumbbell Handles
These are like mini-barbells. You use standard Olympic-sized weight plates (the same as for a barbell) on a short handle.
Here, you must calculate the total. The handle has a certain weight (often 5-10lbs). You then add plates to each side. A 5lb handle with one 25lb plate on each side gives a total of 55lbs (5 + 25 + 25). Always remember to include the handle’s weight in your total.
How To Choose The Correct Dumbbell Weight For Your Workout
Now that you know how the weight is measured, how do you pick the right one? Choosing correctly is key for muscle growth and safety.
Determining Your Starting Weight
If you are new to strength training, you need to find a weight that challenges you but allows good form.
- Test with Light Weight: Start with a very light dumbbell (5-10lbs for most, 15-20lbs for lower body) to warm up and practice the movement.
- Perform Your Target Reps: Try to complete your desired number of repetitions (e.g., 10-12). If the last 2-3 reps are extremely easy, the weight is too light.
- Assess the Challenge: The ideal weight is one where the last 2-3 reps of your set feel challenging but you can still maintain perfect form. If you cannot complete the reps with good form, the weight is to heavy.
- Write It Down: Note the successful weight for each exercise. This becomes your baseline.
Weight Selection For Different Goals
Your training goal dictates the weight and rep range you should use.
- For Muscle Building (Hypertrophy): Choose a weight that causes muscle fatigue in the 8-12 rep range. You should be near failure by the last rep.
- For Strength: Focus on heavier weights for lower reps, typically 4-6. The weight should be very challenging, requiring full recovery between sets.
- For Muscular Endurance: Use lighter weights for higher reps, typically 15-20 or more. The focus is on sustaining effort over time.
When To Increase Your Dumbbell Weight
Progressive overload—gradually increasing demand on your muscles—is how you get stronger. Increase the weight when your current weight becomes to easy.
- You can complete 2-3 more reps than your target on the last set for two consecutive workouts.
- The weight feels light and you have no muscle soreness after your workout.
- Your form remains impeccable with the higher weight—never sacrifice form for more pounds.
For most dumbbell exercises, increase in small increments, like 5 pounds total (moving from a 20lb to a 25lb dumbbell).
Practical Examples: Calculating Weight In Common Exercises
Let’s apply this knowledge to real workouts. This will solidify your understanding of total weight versus per-side thinking.
Single Dumbbell Exercises
Exercises where you use one dumbbell are straightforward. The weight you lift is the total on the dumbbell.
- Goblet Squat: You hold one 30lb dumbbell vertically against your chest. You are squatting with 30lbs of load.
- Single-Arm Row: You place one hand on a bench and row a 40lb dumbbell with the other. Your back muscles are working against 40lbs.
- Overhead Tricep Extension: Holding one 20lb dumbbell with both hands overhead, you lower it behind your head. Your triceps are moving 20lbs.
Two Dumbbell Exercises (One In Each Hand)
Here, each limb works independently with its own total weight. You are not adding the weights together for a single lift.
- Bicep Curls: With a 15lb dumbbell in each hand, your right bicep curls 15lbs and your left bicep curls 15lbs. You are not curling 30lbs with one muscle group.
- Dumbbell Bench Press: Lying on a bench with a 50lb dumbbell in each hand, you press them up. Each side of your chest and each arm is independently pressing 50lbs. The total load on your body is 100lbs, but it is distributed across two separate implements.
- Walking Lunges: Holding a 25lb dumbbell in each hand, you are adding 50lbs of total load to your body during the lunge movement.
Safety Tips Based On Understanding Dumbbell Weight
Using the correct weight is a major part of gym safety. Misunderstanding can lead to accidents.
Start Lighter Than You Think
It is always better to underestimate your strength for a first set. You can always move up in weight next set. Starting too heavy can cause you to drop the weight or strain a muscle immediately.
Secure Adjustable Dumbbells Properly
If you use plate-loaded adjustable dumbbells, always ensure the collars or locks are fastened tightly. A loose plate can slide off during an exercise, causing serious injury.
- Check that the collar screw is tightened all the way against the plate.
- Give the dumbbell a light shake before lifting to listen for any rattling.
- Never skip using the collar, even for a light set.
Know When To Use Spotters
For very heavy dumbbell exercises, like heavy dumbbell bench presses or heavy goblet squats, having a spotter is wise. They can help you get the weight into position and assist if you fail a rep. They understand you are handling a single, total weight and can assist accordingly.
FAQ: Frequently Asked Questions
If A Dumbbell Is 20Lbs, Is That The Weight For One Hand?
Yes, exactly. A 20lb dumbbell is an implement for one hand that weighs 20 pounds in total. If an exercise calls for one dumbbell, you use one 20lb dumbbell. If it calls for two, you use two separate 20lb dumbbells, one in each hand.
How Do I Calculate The Weight On An Adjustable Dumbbell?
Add the weight of all components. For a standard handle with plates: [Handle Weight] + [Weight of Plate on Side A] + [Weight of Plate on Side B] = Total Dumbbell Weight. For selectorized models, the dial shows the total.
Do Olympic Dumbbell Handles Weigh 5Lbs Each?
This varies by brand. An Olympic loadable dumbbell handle typically weighs between 5 and 10 pounds. You must check the product specifications. Never assume; always include the handle’s weight in your total calculation.
Why Is There So Much Confusion About Dumbbell Weight?
The confusion usually comes from barbell training, where you add multiple plates to a single bar. People new to fitness often apply that logic to dumbbells. Also, marketing for selectorized dumbbells isn’t always perfectly clear, leading to the “per side” assumption.
Should I Buy Dumbbells In Pairs Or Singles?
For most training, you will need pairs (two dumbbells of the same weight). They are almost always sold in pairs for this reason. However, for some specialized exercises or if you are on a strict budget, you might start with a single adjustable dumbbell, which allows you to work one side at a time.
Understanding that a dumbbell’s marked weight is its total weight is a fundamental piece of fitness knowledge. It ensures you train with the correct intensity, track your progress accurately, and most importantly, stay safe. Next time you pick up a dumbbell, you’ll know exactly what that number means and how to use it effectively to reach your goals.