7 Best Cast Iron Dumbbell Plates (November 2026)
The best cast iron dumbbell plates include the Yes4All 1-inch Cast Iron Weight Plates for 1-inch handles, the Micro Gainz 1.25LB Dumbbell Fractional Weight Plates for small weight increases, and the Unipack Cast Iron 1.14-inch Center Hole Weight for wider standard handles.
On this page (6 sections)
The best cast iron dumbbell plates depend on your handle diameter: choose 1-inch plates for standard handles and 2-inch plates for Olympic handles. For a common standard fit, Yes4All's set includes four 10 lb plates with machined 1-inch holes.
Measure the handle where the plate sits before choosing a set. A small mismatch can leave the plate loose or prevent it from fitting, and a compatible hole still needs enough sleeve space for the collar.
Our picks at a glance
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1
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2
Best for small weight increasesMicro Gainz 1.25LB Dumbbell Fractional Weight Plates
9.6/10 our score
See it on Amazon -
3
Best for wider standard handlesUnipack Cast Iron 1.14-inch Center Hole Weight
9.5/10 our score
See it on Amazon
- 4
Best for a ready-to-use setCheck it - 5
Check itStandard 1 inch Cast Iron Weight plates
Best for broad weight choices - 6
Check itYes4All Old School Adjustable Dumbbell Set
Best for complete adjustable dumbbells - 7
Check itBody-Solid Cast Iron Olympic Single Weight Plate
Best for 2-inch Olympic handles
How we chose cast iron dumbbell plates
We compared hole diameter, stated handle compatibility, plate weights and whether each option is a plate set or a complete adjustable dumbbell set. Our score weighs specs and features against what you're shopping for.
This roundup includes standard plates, a fractional-weight option and a 2-inch Olympic plate. Micro Gainz uses sintered steel rather than cast iron, but its 1.25 lb increments address a useful dumbbell-loading need.
Compare dumbbell plate fit and weight options
Match the hole to your handle first, then compare the plate weights and set format. A complete adjustable set can be a better fit when you don't already own compatible handles.
| Product | Best for | Hole diameter | Included plates | Material | Our score |
|---|---|---|---|---|---|
| Yes4All 1-inch Cast Iron Weight Plates | 1-inch handles | 1 inch | 4 x 10 lb | Cast iron | 9.7 |
| Micro Gainz 1.25LB Dumbbell Fractional Weight Plates | small weight increases | Four | Sintered steel | 9.6 | |
| Unipack Cast Iron 1.14-inch Center Hole Weight | wider standard handles | 1.14 inches | Cast iron | 9.5 | |
| TELK | a ready-to-use set | Cast iron plates | 9.2 | ||
| Standard 1 inch Cast Iron Weight plates | broad weight choices | 1 inch | Cast iron | 8.9 | |
| Yes4All Old School Adjustable Dumbbell Set | complete adjustable dumbbells | Cast iron plates and stainless steel handles | 8.7 | ||
| Body-Solid Cast Iron Olympic Single Weight Plate | 2-inch Olympic handles | 2 inches | Cast iron | 8.4 |
The best cast iron dumbbell plates for each handle
The best choice is the one that fits your handle and loading plan. These picks cover common 1-inch standard setups, a wider standard opening, complete sets and Olympic handles.
Yes4All 1-inch Cast Iron Weight Plates: Best for 1-inch handles
- Machined 1-inch center hole
- Four 10 lb plates
- Semi-gloss black coating
A straightforward match for 1-inch standard dumbbell handles, with four 10 lb plates in the set. Measure the handle before choosing.
Pros
- Machined 1-inch center hole
- Four plates included
- Multiple individual plate weights available
Cons
- Set includes four 10 lb plates
- Not for Olympic handles
Yes4All's 1-inch center hole makes this set the clearest match for standard handles measured at 1 inch. The package contains four 10 lb plates, so it works best when that weight and quantity fit your loading plan.
The machined center hole is designed for a stable fit on 1-inch bars. Yes4All also offers individual plate weights from 5 to 25 lb, which gives you other choices for building a mix of loads.
The semi-gloss black coating is intended to protect the cast iron from moisture. Smooth edges and balanced weight distribution are also listed features, though your handle, collars and loading technique still affect setup security.
Choose this set when you want four 10 lb plates for 1-inch handles. Measure the sleeve and check the handle's capacity before adding them.
Micro Gainz 1.25LB Dumbbell Fractional Weight Plates: Best for small weight increases
- Four 1.25 lb micro plates
- For most dumbbell handles
- Powder coat finish
These small plates are designed for fractional loading, with four 1.25 lb pieces for gradual increases. Confirm their fit with your handle.
Pros
- Small weight increments
- Four plates included
- Powder coat finish
Cons
- Not cast iron
- Specific handle diameter is not given
Micro Gainz is the pick for lifters who want smaller increases than common cast iron plates provide. The set has four 1.25 lb fractional plates made from sintered steel with a powder coat finish.
The plates are described as fitting most dumbbell handles, but a specific hole diameter isn't given. Check the fit with your handle and collar before using them, especially if your handle has a nonstandard shape.
Fractional loading can make a planned increase more gradual. The set is also described for kettlebells and standard barbells, so it may suit a setup that uses several types of equipment.
Choose Micro Gainz when small increments matter more than cast iron construction. It is the only non-cast-iron pick in this roundup.
Unipack Cast Iron 1.14-inch Center Hole Weight: Best for wider standard handles
- 1.14-inch center hole
- Cast iron construction
- Weight choices from 1.25 to 10 lb
The 1.14-inch opening is intended for many 1 to 1.125-inch standard bars and handles. Check your handle's measured diameter and collar fit.
Pros
- Cast iron plates
- Four weight choices
- 1.14-inch center hole
Cons
- Opening may be loose on narrower handles
- Set choice affects included weight
Unipack's 1.14-inch center hole is intended for many 1 to 1.125-inch standard bars and dumbbell handles. It offers plate choices of 1.25, 2.5, 5 and 10 lb, making it a flexible option if your handle matches the opening.
The plate is solid cast iron with a black coating. The set format varies by weight choice, so check the exact quantity and weight combination you need before ordering.
A 1.14-inch hole may have extra play on a narrower handle. Confirm that your collar can secure the plates without movement before lifting.
Choose Unipack when your measured handle is compatible with the wider opening and you want multiple plate weight choices.
TELK: Best for a ready-to-use set
- Adjustable dumbbell set
- 1.15-inch plates and handles
- Cast iron plates
This adjustable set pairs cast iron plates with 1.15-inch handles. It suits buyers who need handles and plates together rather than replacement plates alone.
Pros
- Plates and handles are sized together
- Adjustable set
- Barbell conversion rod included with the 65 lb set
Cons
- Not a replacement plate set alone
- 65 lb set adjusts from 5 to 32.5 lb per dumbbell
TELK is a complete adjustable dumbbell set, rather than a replacement plate bundle. The 65 lb option uses 1.15-inch plates and handles, includes two dumbbells, and comes with a chrome barbell conversion rod.
The set adjusts from 5 to 32.5 lb per dumbbell in 2.5 lb increments. That makes it relevant if you need handles and plates together, but it won't solve a plate-only replacement need.
The stated plate and handle size is 1.15 inches. Check compatibility carefully if you already own 1-inch handles, since the sizes aren't identical.
Choose TELK when you want a matched set with its own handles. For individual plates, compare the standard-size choices above.
Standard 1 inch Cast Iron Weight plates: Best for broad weight choices
- 1-inch center hole
- Cast iron
- Weight range from 1.25 to 50 lb
A wide range of plate weights can help build a set around 1-inch handles. Check whether the selected weight is sold as a pair.
Pros
- Broad range of weights
- Cast iron construction
- For dumbbell handles and 1-inch bars
Cons
- Selected weight may be sold in a pair
- Not for Olympic handles
Iron Crush's 1-inch cast iron plates stand out for their wide stated weight range, from 1.25 to 50 lb. That range gives you options for small increases or heavier loading, provided the weight and plate format fit your handle.
The plates are intended for 1-inch dumbbell handles, barbells and adjustable kettlebell handles. The hammertone finish is described as guarding against rust and corrosion.
Check how the specific weight is sold before building a pair. The selected weight may come as a pair, and heavier plates can take up more sleeve space than lighter ones.
Choose these when you want a broad weight range for a 1-inch setup. Measure sleeve length as well as handle diameter.
Yes4All Old School Adjustable Dumbbell Set: Best for complete adjustable dumbbells
- Two 16-inch, 1-inch handles
- Cast iron plates
- Includes star lock collars
This set combines two 1-inch handles with cast iron plates and collars. Choose it when you need a complete adjustable pair, not extra plates only.
Pros
- Handles, plates and collars included
- 1-inch handles
- Several plate weights
Cons
- Set ships in two packages for the 105 lb option
- Not a plate-only purchase
Yes4All's Old School set is for buyers who need handles, plates and collars together. The 105 lb option includes two 16-inch handles with a 1-inch diameter, plus cast iron plates in 1.25, 2.5 and 5 lb sizes.
The handles are stainless steel, and the set includes star lock collars. That makes it a complete adjustable dumbbell pair, not a source of extra plates for existing handles.
The 105 lb set ships in two packages. Other set sizes are available, so confirm the included weights and pieces for the option you choose.
Choose this set to start a 1-inch adjustable dumbbell setup from scratch. If you already own handles, a plate-only set may be simpler.
Body-Solid Cast Iron Olympic Single Weight Plate: Best for 2-inch Olympic handles
- 2-inch center hole
- Cast iron plate
- Black satin enamel finish
This Olympic plate has a 2-inch center hole for compatible Olympic equipment. Confirm the selected plate weight and handle capacity before buying.
Pros
- 2-inch center hole
- Cast iron construction
- Single plate format
Cons
- Won't fit standard 1-inch handles
- Confirm material and selected weight before ordering
Body-Solid is the Olympic option here, with a 2-inch center hole for compatible Olympic equipment. That size is much wider than a standard dumbbell handle, so it won't fit a typical 1-inch setup securely.
The plate is cast iron with a black satin enamel finish and is sold as a single plate. Confirm the selected weight and that your handle is made for 2-inch Olympic plates before choosing it.
This pick makes sense when your dumbbell handles use Olympic sleeves. If you need standard 1-inch plates, choose one of the standard options instead.
Choose Body-Solid only for a compatible Olympic handle and confirmed plate weight.
How do you match a plate hole to a dumbbell handle?
Measure the handle sleeve at the point where the plate rests, then compare that measurement with the plate's center hole. For example, a 1-inch plate is meant for a 1-inch bar, while a 2-inch Olympic plate needs an Olympic sleeve.
The collar also matters. Check that the plate fits with enough sleeve left for the collar to engage fully, and follow the handle maker's load limit.
For handle options, see our guides to best loadable dumbbell handles and best loadable dumbbell handles olympic. The best adjustable dumbbells for functional trainer guide can help if you're deciding between adding plates and using a complete adjustable setup.
When should you choose standard plates or Olympic plates?
Choose standard plates for a handle designed around roughly 1-inch sleeves, and Olympic plates for a handle with a 2-inch sleeve. These formats aren't interchangeable without a suitable, secure adapter designed for the equipment.
If you're also setting up a functional trainer, compare weight plates for functional trainer and Olympic weight plates for functional trainer to check the equipment's plate format. For a different free-weight choice, our competition kettlebells vs cast iron guide explains how the two styles differ.
Which cast iron dumbbell plates should you choose?
Pick Yes4All if you have 1-inch handles and want four 10 lb plates. Choose Unipack when your handle matches its 1.14-inch hole, Iron Crush for a broad range of standard plate weights, or Body-Solid for a compatible 2-inch Olympic handle.
If you need handles and plates together, compare the TELK or Yes4All adjustable sets. For a block-style adjustable option, see our PowerBlock Elite dumbbells review.
Our top 3 picks at a glance
-
1
-
2
Best for small weight increases
Micro Gainz 1.25LB Dumbbell Fractional Weight Plates
9.6/10 our score
See it on Amazon -
3
Best for wider standard handles
Unipack Cast Iron 1.14-inch Center Hole Weight
9.5/10 our score
See it on Amazon
Frequently asked questions
How do I know which dumbbell plates fit my handles?
Measure the handle diameter where the plate sits, then compare it with the plate's center hole. Standard handles are commonly around 1 inch, while Olympic handles use a 2-inch opening.
Also check the collar and sleeve length.
A plate can fit the diameter and still leave too little room for the collar to secure the load.
Are 1-inch and 1.14-inch dumbbell plates interchangeable?
They may fit some of the same handles, but the fit can differ. Unipack describes its 1.14-inch center hole as fitting many 1 to 1.125-inch standard bars and handles.
Measure your handle and check how the collar holds the plates before loading or lifting.
Can I use Olympic plates on standard dumbbell handles?
No. A 2-inch Olympic plate opening is too wide for a standard 1-inch handle to hold securely.
Match the plate opening to the handle, and use a collar designed for that handle.
Body-Solid's Olympic plate is made for compatible 2-inch equipment.
What should I check before buying replacement plates?
Check the handle diameter, plate hole, collar type, sleeve length and the handle's load limit. Then confirm how many plates are included and whether their weights are sold individually, in pairs or in a set.
For a complete setup, compare loadable dumbbell handles before adding plates.
Are fractional plates useful on dumbbells?
Fractional plates can make smaller weight increases possible when regular plates force jumps that feel too large. Micro Gainz includes four 1.25 lb plates intended for dumbbell handles, kettlebells and standard barbells.
Confirm that the attachment fits your handle and stays clear of the collar.
