Own
Know what your Bitcoin actually cost.
Enter what you paid and the BTC you received. We calculate your effective average cost without asking where you bought it.
Your numbers
Bitcoin cost summary
Break-even price: — per BTC.
Local ledger
Add your purchases.
Enter what you actually paid and the BTC you actually received. Any fees or spread are then reflected automatically.
Clearing browser data removes entries. Export backups regularly. Changing currency relabels entries; it does not convert historical amounts.
Stored only in this browser. Nothing is uploaded.
Worked example
How do I calculate Bitcoin average cost and break-even?
Pay $500 for 0.005 BTC, then $300 for 0.002 BTC: $800 divided by 0.007 BTC gives an average cost of about $114,286 per BTC.
Does break-even include future selling costs?
No. Break-even here equals the recorded average purchase cost. Selling fees raise the actual break-even price. This ledger tracks accumulated purchases, not remaining cost after sales or tax basis.