What is the Antminer S19?
Definition · Antminer S19
A range of air-cooled SHA-256 Bitcoin mining machines from Bitmain, first shipped in 2020. Every model is the same shape of box with a built-in power supply; later versions got more hashrate out of each watt.
5
Models on this page
manufacturer-rated, September 2026
21.5 to 34
J/TH range
lower is better
95 to 141
TH/s range
per machine
$0.0454
Per TH/s per day
live hashprice
The S19 was Bitmain’s main line from 2020 until the S21 arrived in late 2023, which is why so many are still running and for sale used. New to mining machines? Start with what a mining machine is.
How do the S19 models compare?
| Model | Shipped | TH/s | Watts | J/TH |
|---|---|---|---|---|
| S19 | 2020 | 95 | 3,250 | 34 |
| S19 Pro | 2020 | 110 | 3,250 | 29.5 |
| S19j Pro | 2021 | 104 | 3,068 | 29.5 |
| S19 XP | 2022 | 141 | 3,032 | 21.5 |
| S19k Pro | 2023 | 120 | 2,760 | 23 |
The S19 also came in 90 TH/s versions, and the S19j Pro in a 100 TH/s version, at about the same J/TH. Liquid-cooled S19 variants exist too; they’re left out here because we list only models whose spec sheets we’ve checked. Specs, not a purchase recommendation. The hardware comparison covers today’s machines from every maker.
How does the S19 compare with the S21?
Every machine earns the same per TH/s. What separates them is how much electricity each TH/s costs, measured in joules per terahash (J/TH).
Energy per terahash, S19 generation vs S21
To match the 141 TH/s of an S19 XP, an S21 XP needs about 1,904 W instead of 3,032 W. Against the original S19 the gap is wider: 60% less energy for the same work. The full S21 line-up, including hydro and immersion models, is on the Antminer S21 page.
What electricity price does an S19 break even at?
Break-even electricity price, at live hashprice
Below its break-even price a machine mines more than its electricity costs. Above it, every hour runs at a loss. Hashprice moves with the BTC price, the network’s hashrate and fees; the hashprice guide explains each one, and what it costs to mine a bitcoin puts the same maths in dollars per coin.
Does an S19 still make sense after the 2024 halving?
In April 2024 the block subsidy halved from 6.25 to 3.125 BTC. Overnight, every TH/s mined about half as much bitcoin, while an S19’s power bill stayed exactly the same. Switch between the eras to see what that did to each model.
Break-even electricity price in each halving era
1 TH/s mines about $0.0454 a day in this era
The honest answer: an S19 still makes sense for some people, but a narrow group. It needs power well under the break-even line, a machine bought cheaply enough to pay back before the next halving in 2028, and a place where noise and heat don’t matter.
Can still work if
- Your all-in power is well under 9¢ per kWh (XP) or 6¢ (S19)
- You can use the heat, for a workshop, greenhouse or water tank
- You already own one, so the machine’s price is behind you
- You want to learn how mining works on real hardware
Hard to justify if
- You pay a typical household electricity price
- You’re counting on the BTC price to rise to make it pay
- The machine would sit in a living space
- The seller can’t show it hashing on a pool
What should you check before buying a used S19?
Bitmain now sells the S21 generation, so most S19s change hands used, often after years of nonstop running in a farm. We don’t list prices: used prices move with hashprice and the unit’s condition, and there’s no source we’d trust to quote.
- 1
Work out your break-even first
Use the calculator at the top with your real all-in tariff. If the number is negative at your price, no purchase price fixes it.
- 2
See it hashing
Ask for the machine’s dashboard and a pool worker page showing all three hashboards at the rated hashrate, rather than a photo.
- 3
Check the parts that wear
Fans, the power supply and the hashboards fail first. Ask about repairs, and expect any factory warranty to be long over.
- 4
Match the model to its sheet
Sellers sometimes mix up versions. The model on the label should match Bitmain’s sheet for the hashrate and power you’re promised.
- 5
Plan the supply
Every S19 sheet asks for 200 to 240 V on two AC inputs, 10 A each. A normal 120 V socket won’t do.
How much power, heat and noise does an S19 put out?
3.25 kW
S19 and S19 Pro draw
rated, nonstop
78 kWh
Per day
running nonstop
11,089
BTU per hour of heat
all of the power ends up as heat
200 to 240 V
Supply
two AC inputs, per Bitmain’s sheets
Nearly every watt an S19 draws comes out as heat, about the same as two electric space heaters on full. Bitmain’s S19 sheets don’t give a noise figure. It’s an air-cooled box with high-speed fans, like the air-cooled S21s that Bitmain rates at 76 dBA, so plan for a garage, a shed or a data centre. The mining at home guide covers wiring, noise and using the heat.
What does the estimate leave out?
The machine’s price
Plus shipping, import duty and any repairs to a used unit.
Pool fees
Usually a few percent of what the machine mines.
Hosting or ventilation
A hosting rate, or ducting and fans to move the heat out.
Downtime and repairs
Worn fans, failed hashboards, heat waves and curtailment.
Network growth
Hashrate tends to rise, so each TH/s mines a little less over time.
The 2028 halving
The subsidy halves again, and so does most of the gross.
For the full picture read is Bitcoin mining profitable.
Can you mine without buying a machine?
Yes. In the CloudMineCrypto app you mine for free with the free plan, ads, games, offers and daily check-ins, and your estimated BTC ticks up while your plans run. No machine, no fans, no power bill, and you withdraw to your own wallet, Lightning included. Paid plans are an optional boost for more speed; they usually mine less than they cost.
Good to know: rewards are estimates, move with the network and aren’t guaranteed. A plan doesn’t give you ownership of, or a share in, any specific hardware or pool. Terms apply.
Frequently asked questions
What is the hashrate of the Antminer S19?
Bitmain rates the S19 at up to 95 TH/s on 3,250 W (34 J/TH). The S19 Pro is rated at 110 TH/s and the S19 XP, the fastest air-cooled S19 on this page, at 141 TH/s.
Is the Antminer S19 still profitable?
It depends on your electricity price and changes daily. At today’s live hashprice an S19 covers its power only below about 5.6¢ per kWh, and an S19 XP below about 8.8¢. That’s before the machine’s price, pool fees and downtime.
What is the difference between the S19, S19 Pro, S19j Pro and S19 XP?
On Bitmain’s sheets they’re air-cooled boxes of about the same size and weight. The differences are hashrate and power: the Pro and j Pro get more hashrate from similar power, the k Pro draws less, and the XP is the most efficient S19 on this page.
How much electricity does an S19 use?
Bitmain rates the S19 and S19 Pro at 3,250 W, about 78 kWh a day running nonstop. It needs a 200 to 240 V supply, not a standard 120 V US outlet.
Should I buy an S19 or an S21?
An S21 XP uses about 60% less energy per TH than the original S19, so it covers its power at much higher electricity prices. An S19 only makes sense with very cheap power, and even then the price you pay for it matters most. This page compares specs; it isn’t a purchase recommendation.
Can I run an Antminer S19 at home?
Technically yes, with a 200 to 240 V circuit, strong ventilation and somewhere the noise won’t bother anyone, like a garage or shed. At typical household electricity prices it costs more to run than it mines.
Sources and further reading
- Antminer S19 specifications · Bitmain support (manufacturer)
- Antminer S19 Pro specifications · Bitmain support (manufacturer)
- Antminer S19j Pro specifications · Bitmain support (manufacturer)
- Antminer S19 XP specifications · Bitmain support (manufacturer)
- Antminer S19k Pro specifications · Bitmain support (manufacturer)
- Antminer S21 XP specifications (current generation) · Bitmain (manufacturer)
- Controlled supply: the halving schedule · Bitcoin Wiki
- Mining dashboard: network hashrate and difficulty · mempool.space
Live figures on this page come from the CloudMineCrypto API or from the public blockchain data services named next to them, refresh on a schedule, and are labelled where they appear. This guide is educational and not financial advice. CloudMineCrypto is not an investment product; rewards in the app are estimates and aren’t guaranteed.
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