Guide · Nov 2, 2026 · 6 min read
How big and heavy is a bitcoin miner? 13 to 23 kg air-cooled, up to 50 kg as a rack unit
A first-time buyer pictures a computer. A bitcoin miner is a steel-cased block of 13 to 23 kg if air-cooled, drawing 2.6 to 9.4 kW, and the water-cooled rack units reach 50 kg. Here are the sizes in our store, what each weight means for freight and handling, and the three numbers to check before you order.
Most air-cooled miners weigh 13 to 23 kg
Picture the miners most people see online and you are picturing an air-cooled machine: a rectangular metal case with fans on the front and back. Our store lists 67 air-cooled bitcoin miners in stock as of 2 November 2026, and their weights run from 13 kg to 22.9 kg, with a median of 13.5 kg. That is heavier than most people expect for something that looks like a computer.
The weight is mostly metal. Inside the case are the hashboards that do the hashing, each with a heavy heatsink, plus a power supply and a control board; the guide on what is inside a bitcoin miner shows each part. The heatsinks are what carry the heat away, so a machine that makes more heat tends to weigh more.
| Cooling | Models in stock | Lightest | Median | Heaviest |
|---|---|---|---|---|
| Air | 67 | 13 kg | 13.5 kg | 22.9 kg |
| Water (hydro) | 22 | 12.3 kg | 16 kg | 50 kg |
| Immersion | 3 | 14.4 kg | 16 kg | 18 kg |
Two sizes cover almost every air-cooled machine
The air-cooled machines come in two main shapes. The MicroBT Whatsminers measure 430 by 155 by 226 millimetres and make up 55 of the 67 in stock. Most weigh 13.5 kg. The Bitmain Antminers measure 400 by 195 by 290 millimetres, 11 models, and weigh between 14.9 kg and 22.9 kg. One Canaan model has no size in our record, so we leave it out.
Width, height and depth matter for one reason: how many fit on a shelf, and how much room the fans need front and back. A machine that is taller and deeper does not mean it is more powerful. The Antminer S21 XP, at 270 TH/s, weighs 18.7 kg and the Whatsminer M61S at 216 TH/s weighs 13 kg to 13.5 kg, but the S21 XP is the more efficient machine and draws less power per terahash. Size follows the casing, not the hashrate. Read the spec sheet guide to see how the numbers fit together.
Check the weight and the three dimensions on the spec sheet before you decide where the machine will stand.
Water-cooled machines are lighter, or much heavier, depending on the shape
Water-cooled (hydro) machines have no fans. Cold water runs through plates on the hashboards and carries the heat to a cooler outside the building, which is why the case can be smaller: 410 by 170 by 209 millimetres for 15 of the 22 hydro models in stock and 12.3 kg to 16.5 kg across those. The Antminer S19 XP+ Hyd at 12.3 kg is the lightest machine in the whole catalogue of in-stock machines.
The heavy end is different. Four hydro models are rack-mounted units 900 millimetres deep and 482 millimetres wide, the width of a standard 19-inch rack, and 88 or 130 millimetres tall: a '2U' or '3U' machine. They weigh 19.1 kg to 50 kg. The heaviest, the Antminer S21e XP Hyd 3U, is 50 kg. Immersion machines, which run submerged in a tank of oil, weigh 14.4 kg to 18 kg. Our guide to air, hydro or immersion explains how to choose between them.
Weight decides how a miner travels and who can lift it
Freight is charged by weight and volume, so a 22.9 kg machine costs more to ship than a 13 kg one, and a pallet of rack units costs more again. That cost is one line of the landed price, the figure that includes the box, freight, duty and setup, which our guide to the price of a miner is not the price of the box breaks down.
Handling is the second effect. A 13 kg machine can be lifted by one person onto a shelf. At 22.9 kg most people will want a second pair of hands, or a trolley. At 50 kg, as with the largest rack unit, it is a job for two people and a lift or a rack rail. If it is hosted, you never lift it yourself, but it is a reason a home shelf is rarely the right place for the bigger machines.
The power draw is the bigger question than the weight
The air-cooled machines in our store draw between 2,643 and 9,396 watts, with a median of 3,502 W. The water-cooled ones draw 4,785 to 11,180 W. Every watt becomes heat, which the fans or the water have to remove, and the power has to arrive on a circuit sized for it. Our guide to how much electricity a miner uses works this through in money.
Noise is the other thing the case size cannot show. Only 15 of the 92 machines in stock list a noise figure in our records, and the 11 air-cooled ones among them say 75 to 76 decibels. Our piece on how loud a bitcoin miner is covers what that means for a home. At a hosting site, noise, power and handling are the site's job, not yours.
Where to find them, in four steps
Step 1: open the maker's spec sheet for the exact model and hashrate, because one model name can cover several versions with different weights. Step 2: find the lines marked weight and dimensions, usually in kilograms and millimetres, and write them down. Step 3: multiply by the number of machines you plan to buy, so you know what a delivery weighs. Step 4: check the weight against whoever will unload it, and the depth against the shelf or rack that will hold it.
If the sheet gives a weight with and without the packaging, use the packed one for freight and the bare one for the shelf. The two can differ, and a shelf rated for the bare weight of five machines is a different thing from one that must hold the delivery crate.
Three numbers to check before you order
Look at the weight, the dimensions and the noise on the spec sheet first. Weight tells you who can lift it and what freight will cost. Dimensions tell you how many fit on a shelf and whether it fits a rack at all. Noise tells you whether it can live in a building with people in it.
If a store record does not list one of them, ask. Of the models in stock, seven have no dimensions in our record and 77 have no noise figure, so we leave those out rather than guess. A figure that cannot be checked is not a figure, and a machine whose weight nobody will state is one to ask about before you pay.
What it means for a miner
Size and weight are not what makes a machine earn. Efficiency and the power price do that, and neither is visible from the outside of the case. What the weight tells you is how the machine gets to where it will run and whether it can be handled safely when it is there.
If you buy a machine from us and host it with us, you pay one all-in price that covers the machine, freight, duty, setup and a hosting deposit, and we run it at one of our sites. The 13 kg or the 50 kg is then our team's to lift, and your part is to pick the machine and watch it in the owner portal. If you decide to host it yourself, everything on this page is yours to plan for.
Sources and further reading
- Rack unit — Wikipedia, opened 2 Nov 2026
Disclosure
Firsthand Bitcoin sells and hosts mining hardware, including this machine. No manufacturer, distributor or affiliate programme paid for or reviewed this page and we take no commission on the links above. Historical figures are computed from daily bitcoin price and network hashprice, each day valued at its own prices. Nothing here is investment advice.