Loan against your bitcoin
How much to borrow by LTV, your liquidation price and a stress test if bitcoin drops 30, 50 or 70%.
- 100% free
- No sign-up
- Your numbers stay on your device
- Export to CSV and PDF
Posting bitcoin as collateral lets you keep your BTC, but it adds interest and liquidation risk: if the price falls far enough, the lender sells your collateral. This calculator shows the loan amount, the liquidation price and the drop that triggers it, how much collateral you would need to add in each drop scenario, and how much bitcoin has to rise for borrowing to beat selling. The BTC price is live and you can change it.
How to use the calculator
Your collateral
How much BTC you would post and the starting LTV (the share of its value you borrow).
The terms
Your lender's liquidation LTV (83% by default), annual rate and term.
The risk
Liquidation price, stress test and the cost of borrowing versus selling.
What's included
Liquidation price
The BTC price at which the lender would sell your collateral, and how far it would have to fall.
Stress test
Drops of 30, 50 and 70%: resulting LTV, whether it liquidates and how much BTC to add.
Cost versus selling
Interest over the term and the BTC rise needed for borrowing to beat selling.
Live price
BTC price from mempool.space, editable.
Export
Result as CSV or PDF and a shareable link.
Private
The math runs in your browser; nothing is stored.
What it is for
Miners who don't want to sell
Pay for power or hosting with a loan and keep the mined BTC, knowing the risk.
Comparing lenders
Each has its own liquidation LTV and rate: change the values and compare.
Choosing how much to borrow
See how risk falls when you borrow less: at a low LTV liquidation is much further away.
Compared with the lender's own calculator
Exchange and lender calculators show how much you can borrow; this one mostly shows how much it can cost you.
- Stress test with large drops, not just the amount
- Collateral to add in each scenario
- Cost versus selling: the minimum rise for it to pay off
- Independent: no lender links
Frequently asked questions
How is the liquidation price of a bitcoin loan calculated?
Liquidation price = starting LTV × BTC price ÷ liquidation LTV. For example, with a 30% LTV, liquidation at 83% and BTC at 100,000 USD, you are liquidated if BTC falls to about 36,145 USD, a 64% drop.
What LTV is safe for a BTC-backed loan?
The lower it is, the further away liquidation sits. At an LTV of 25–30% or less, only an extreme drop (around 65% or more with liquidation at 83%) liquidates you; at 50% or more, an ordinary bitcoin drawdown can.
What is a margin call?
It is the lender's warning when your LTV reaches a set level before liquidation: you are asked to add collateral or repay part of the loan. If you know your lender's level, enter it and the calculator gives you the price.
Should I borrow against my BTC or sell it?
Borrowing beats selling only if bitcoin rises more than the loan's interest over the term. The calculator gives you that minimum rise; borrowing also adds liquidation risk.
What if I repay the loan with mining income?
If the BTC price falls, your LTV rises while your mining income in dollars falls: exactly when you need it most there is less to pay with. That is why a low LTV and a cash buffer matter.
Do you store my data?
No. The math runs in your browser; only the BTC price comes from mempool.space.