Convert between US Dollars and Bitcoin Satoshis in real time. 1 Bitcoin = 100,000,000 sats.
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A satoshi (sat) is the smallest unit of Bitcoin, equal to 0.00000001 BTC. There are 100 million satoshis in one Bitcoin. Named after Bitcoin's pseudonymous creator Satoshi Nakamoto, sats are the standard unit for Lightning Network payments, tipping on Nostr, and micropayments.
As Bitcoin's price has grown, thinking in sats has become more practical than thinking in whole BTC. Instead of saying "I own 0.00042 Bitcoin," you'd say "I own 42,000 sats." It's cleaner, more intuitive, and it's how the Lightning ecosystem works natively.
Stacking sats is the practice of regularly accumulating small amounts of Bitcoin over time. When you dollar-cost average into Bitcoin, you're stacking sats. When you earn SatsBack rewards on Speed Wallet, you're stacking sats. When someone zaps you on Nostr, you're receiving sats.
The sat standard removes the psychological barrier of Bitcoin's high per-coin price. You don't need to buy a whole Bitcoin. You can start with 1,000 sats and build from there. Check our Stacking Sats Guide for proven methods.