You don't need to buy a whole Bitcoin

One of the most common misconceptions about Bitcoin is that you have to buy an entire coin. You don't. Bitcoin is divisible into 100 million smaller units, and each one is called a satoshi — or "sat" for short.

Named after Bitcoin's pseudonymous creator Satoshi Nakamoto, a satoshi is the smallest unit of Bitcoin that the network can recognize. Think of it the way you think of cents in relation to dollars — except there are a hundred million of them per Bitcoin instead of a hundred.

Hodl says
When people say "I can't afford Bitcoin," they usually mean they can't afford a whole one. But you can buy $5 worth of Bitcoin right now. That's thousands of satoshis. The unit doesn't have to be the whole thing.

The math

One Bitcoin equals exactly 100,000,000 satoshis (one hundred million). The relationship is fixed — it never changes.

📐 Satoshi conversion table

1 BTC = 100,000,000 satoshis

0.01 BTC = 1,000,000 satoshis (1 million sats)

0.001 BTC = 100,000 satoshis (100k sats)

0.00001 BTC = 1,000 satoshis (1k sats)

0.00000001 BTC = 1 satoshi (the smallest unit)

At a Bitcoin price of $100,000, one satoshi is worth exactly $0.001 — one tenth of a cent. At higher prices, each satoshi is worth more; at lower prices, less. But the 100-million-to-one ratio never changes.

Why satoshis matter for everyday transactions

Because Bitcoin is worth tens of thousands of dollars per coin, almost no real-world transaction involves a round number of Bitcoin. A $5 coffee paid in Bitcoin might be 0.00005 BTC — which is 5,000 satoshis. Saying "five thousand sats" is cleaner and more intuitive than saying "zero-point-zero-zero-zero-zero-five Bitcoin."

As Bitcoin has grown, many in the community have started denominating transactions in satoshis rather than fractions of a coin. Some wallets and apps now display balances in sats by default. This trend is likely to continue as adoption grows and the per-coin price rises.

"Stacking sats" — accumulating small amounts of Bitcoin over time — is one of the most common long-term strategies among everyday Bitcoin holders.
A practice that only makes sense once you understand satoshis

For merchants: you receive satoshis, not fractions

When a customer pays you in Bitcoin, what actually moves across the network is a quantity of satoshis. OrangeTill calculates the correct amount automatically — if a customer owes you $12.50, it figures out the satoshi equivalent at the current exchange rate and encodes it in the QR code.

You don't need to think in satoshis on a daily basis. But understanding that Bitcoin is highly divisible helps you understand why very small Bitcoin payments are practical — and why the "I can't afford to pay with Bitcoin" hesitation is usually a misunderstanding.

Are there units smaller than a satoshi?

On Bitcoin's base layer, no — a satoshi is the smallest unit the network processes. However, on the Lightning Network (a payment layer built on top of Bitcoin), there is a theoretical unit called a millisatoshi — one thousandth of a satoshi — used for routing tiny payments. In practice, most users never encounter millisatoshis.

Will the number of satoshis per Bitcoin ever change? ▼
No. The 100-million-satoshi-per-Bitcoin ratio is fixed in Bitcoin's code. It cannot be changed by any government, company, or developer. The total supply cap of 21 million Bitcoin also means the total supply of satoshis is capped at 2.1 quadrillion — a fixed, finite amount.
Do other cryptocurrencies have their own sub-units? ▼
Yes. Ethereum's smallest unit is called a "wei" (10^-18 ETH). Solana's is a "lamport" (10^-9 SOL). Each cryptocurrency defines its own divisibility independently. Bitcoin's satoshi is simply the most widely known.
Can I price products in satoshis instead of dollars? ▼
Technically, yes. Some Bitcoin-native businesses in places with high Bitcoin adoption price goods directly in satoshis. In the US, most merchants price in dollars and let the app convert. OrangeTill handles this automatically — you enter a dollar amount, and it calculates the correct satoshi quantity for the customer's wallet.

Accept any amount — from one satoshi up.

OrangeTill handles all the conversion math. You set a dollar price; your customer pays the right amount in sats.

See pricing →