joulemath

The economics of turning energy into compute

Live data and calculators for Bitcoin mining and AI GPUs, from $40k to MW scale.

Run the numbersSee today's data
Mining pays today...per TH/s a day (hashprice), live
H100 rental$2.69/hrper GPU hour, RunPod
Mining breaks even at...hosting price if you sell as you mine, how
4-year BTC holds in profit100%since 2010, not a guarantee, data

What you can do here

Compare mining vs AISame budget, hosted or self-runPrice an ASICProfit per machine at your power priceCheck your real fleetBTC payout addresses & Vast.ai IDsLearn the basicsGuides on mining and GPU economics

Mine Bitcoin or rent to AI?

Pick your size. We show what each choice earns.

how
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What if:
What each one changes
Change assumptions
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Operation
Hosted vs self-run
Hardware
How buy vs rent works
Currency
Bitcoin mining
Where these defaults come from
GPU rental
Where these defaults come from · H100 prices and specs · Live GPU prices on Vast.ai (affiliate)
Taxes (optional)
Depreciation
How taxes work here. Not tax advice.

Already Running Hardware? Check Your Fleet

View 4-unit demo fleet →

Paste a Bitcoin payout address, a Vast.ai machine ID, or both to see 90-day output and a 3-year projection.

🔒 Browser-only (localStorage). Nothing is sent to a database; BTC lookups go straight to mempool.space. Open source on GitHub.

Where to run this

Providers for each side, with prices we checked and cited. Not a ranking.

Bitcoin mining: hosting and machines

  • Simple MiningHosting, all-in $0.08/kWh under 500 kW, down to $0.065 at Enterprise+. Power, cooling and ops included.
  • Compass MiningHosting, $0.07/kWh S21 XP promo with a 1-unit minimum (Aug 2026, may have ended).
  • bitmainshop.usReseller, Antminer S21 XP at $4,267.88 ($15.81/TH).
  • Endless MiningLowest S21 XP listing $3,428 ($12.70/TH).

Prices read Oct 2026. Sources and context on methodology. Is mining worth it at your power price? See is Bitcoin mining profitable in 2026, with the cost to mine 1 BTC.

Already mining? Track real per-site payouts, power bills, depreciation, and QuickBooks sync. See Flash for miners

AI GPUs: what renters pay for an H100

  • Vast.ai (affiliate)Marketplace, H100 SXM $1.93 low, $3.20 median, $9.10 high per GPU-hour (4 offers, Oct 26).
  • RunPodH100 SXM $2.69/hr Community Cloud, $3.99 Secure Cloud.
  • LambdaH100 SXM $4.29/hr for 1 GPU, $3.99/GPU-hr on 8x, plus tax.

Prices read Oct 26, 2026. These are renter prices, so they are also the rate your own GPUs compete with. More on the H100 page.

Holding BTC

100%of 4-year holds made money
+32%worst 4-year hold
+1,359%median 4-year hold

CoinMetrics daily prices, 2010 to 2026. Past performance is not a guarantee. Details

Who can actually do this
  • GPU rental: a data-center grade site, fiber, serious cooling, and customers who expect uptime SLAs. You only earn when someone books.
  • Mining: power and ventilation. No customers to find. The network pays a reward every block (about every 10 minutes), and you can switch off when power gets pricey.
More on what each takes

Explore the numbers

AI GPUs

Bitcoin ASICs

Power prices

Guides and blog

Already mining?

Reconcile Bitcoin pool payouts, site power bills, and hardware depreciation with 1-click QuickBooks sync.

See Flash for miners

Run GPUs for AI?

Flash handles the books and payments for GPU and AI compute providers, including Vast.ai accounting.

See Flash for compute providers