The question “what is a satoshi?” comes up in almost every beginner conversation about Bitcoin, and the answer matters more in Canada than most people expect. A satoshi is the smallest unit a bitcoin can be split into on the Bitcoin blockchain: one hundred millionth of a coin, written as 0.00000001 BTC. At a price near $90,690 CAD, a single satoshi is worth roughly nine hundredths of a cent. That sounds like trivia until you buy $25 of bitcoin, check a cash machine receipt, or wonder why your wallet shows 27,480 instead of a fraction with eight decimals. This guide covers the unit, the math, and where satoshis change what you receive.
Table of Contents
- What Is a Satoshi, Exactly?
- How Many Satoshis Are in a Bitcoin?
- Why Sats Matter When You Buy Small Amounts
- Satoshis at a Bitcoin ATM in Canada
- Sats, Fees, and Dust: What to Watch
- Keeping Satoshi Records for the CRA
- Frequently Asked Questions
What Is a Satoshi, Exactly?
A satoshi is the base unit of Bitcoin. Every wallet balance, every amount recorded on the blockchain, and every fee paid to a miner is a whole number of satoshis underneath. The protocol does not track fractions of a coin. It tracks integer satoshis, and one bitcoin is 100,000,000 of them under a familiar name.
The Bitcoin Wiki defines it plainly: the satoshi is the smallest unit of bitcoin recorded on the blockchain, at one hundred millionth of a single bitcoin (Bitcoin Wiki, Satoshi unit). The unit honours Satoshi Nakamoto, the pseudonymous author of the 2008 whitepaper, but a satoshi is not a separate coin, token, or network. It is bitcoin counted in smaller numbers, the same way a dollar contains one hundred cents.
The eight-decimal rule
Bitcoin Core, the reference implementation that most nodes run, defines a constant called COIN with a value of 100,000,000 in its consensus amount header (Bitcoin Core source, amount.h). That one line is why every bitcoin amount in software carries eight decimal places, and why 0.00000001 is the smallest value you can send on-chain. The eight-decimal format is a display convention wrapped around an integer. When a wallet shows 0.00055000 BTC, it is telling you 55,000 satoshis.
Why the name sounds like a person
Because it is one. Satoshi Nakamoto has never been publicly identified, and the name has stuck to the unit since the project’s earliest days. The code comments in that same header file still carry the original 2009 copyright line. When someone says they are “stacking sats,” they mean accumulating bitcoin in whole satoshi units, not buying a different asset.
How Many Satoshis Are in a Bitcoin?
One bitcoin equals 100,000,000 satoshis. With a supply cap of 21 million bitcoin, the total number of satoshis that will ever exist is 2.1 quadrillion, fixed by the protocol rather than by any central bank.
| Bitcoin amount | Satoshis | Approx. CAD value |
|---|---|---|
| 0.00000001 BTC | 1 sat | $0.0009 |
| 0.00001 BTC | 1,000 sats | $0.91 |
| 0.0001 BTC | 10,000 sats | $9.07 |
| 0.001 BTC | 100,000 sats | $90.69 |
| 0.01 BTC | 1,000,000 sats | $906.90 |
| 1 BTC | 100,000,000 sats | $90,690 |
Those Canadian figures come from a bitcoin price of about $90,690 at the time of writing. Bitcoin is quoted in US dollars on most venues, so the Canadian number is a currency conversion on top of the asset price. The Bank of Canada publishes daily reference rates that explain the USD/CAD side (Bank of Canada daily exchange rates). For a current snapshot rather than a fixed number, see our guide to the bitcoin price in Canadian dollars.
A shortcut for mental math
At roughly $90,690 CAD per bitcoin, one Canadian dollar buys about 1,103 satoshis: $20 is near 22,053 sats, $50 near 55,133, and $100 near 110,266 before fees. Divide the satoshi figure by 1,103 to go back. Treat it as a sanity check rather than an accounting method, since the multiplier drifts with the price and every machine applies its own spread.
Why Sats Matter When You Buy Small Amounts
Unit bias is the real reason satoshis matter for anyone buying small amounts. A number like 0.00055 is hard to hold in your head. Fifty-five thousand sats sitting next to a $50 receipt is easy. Wallets that show sats make it obvious whether a purchase delivered the amount you paid for, and they make fee comparisons honest, because a fee quoted as 1,200 sats lines up against your balance instead of hiding six decimal places down.
Unit bias in practice
Two providers can sell you the same $100 of bitcoin and present it as 0.00110266 BTC and as 110,266 sats. The first invites you to skip the arithmetic; the second makes the gap between quoted and executed price visible at a glance. Neither is dishonest, but only one is easy to check against the rate on the machine in front of you.
Sats also make dollar-cost averaging legible. If you buy $25 a week, the first few purchases look like rounding errors in bitcoin terms and like a growing stack in satoshi terms. That visibility matters more than the notation, because it keeps the target measurable. If that approach fits how you want to start, our walkthrough on how to buy a small amount of Bitcoin covers minimums, timing, and what to check before you confirm.
Where satoshis show up in everyday Bitcoin
Lightning wallets, tipping apps, and several Canadian bitcoin machines display amounts in sats. Lightning routing accounts in millisatoshis internally, one thousandth of a satoshi, which is the only place smaller-than-a-satoshi numbers exist. Settlement and on-chain balances are always whole satoshis, so anything you withdraw to your own wallet arrives as an integer count.
Satoshis at a Bitcoin ATM in Canada
At a bitcoin ATM, the machine quotes a Canadian dollar price, takes your cash, and sends bitcoin to the wallet address you scan. What lands in that wallet is a number of satoshis. The receipt typically lists the cash inserted, the machine fee, the network fee, the exchange rate used, and the bitcoin amount delivered. Multiply that bitcoin figure by 100,000,000 and you have the exact satoshi count you should see in your wallet balance.
Checking the number before you walk away
Confirm the receiving address on the machine matches the address in your wallet, then check the delivered amount while you are still standing there. If the receipt says 0.00055 BTC and your wallet shows 55,000 sats, the transaction is done. If the balance reads as pending, wait for a confirmation before treating it as final. Our step-by-step guide to using a Bitcoin ATM covers the full flow, including the identity checks Canadian operators must run and the wallet details that cause most first-time problems.
Why your wallet might not show sats at all
Many wallets default to bitcoin with eight decimals and hide the satoshi view in settings, while others show sats on the main screen and bitcoin only in transaction details. Neither is wrong, but knowing which one you are reading prevents a scare when a purchase looks ten thousand times smaller than expected. If a number seems impossible, switch the display unit before assuming the machine shorted you.
Sats, Fees, and Dust: What to Watch
Network fees are quoted in satoshis per virtual byte, written as sat/vB, never in dollars. A simple transaction runs roughly 110 to 140 virtual bytes, so at 10 sat/vB you pay somewhere around 1,100 to 1,400 sats. At 50 sat/vB the same transaction costs five times that. The dollar equivalent moves with the price, but the satoshi cost of block space does not care what bitcoin is worth that day.
Why a small satoshi balance can be unspendable
Bitcoin nodes refuse to relay outputs below a dust threshold, because an output worth less than the fee required to spend it only bloats the set of unspent outputs every node has to track. The threshold depends on the output type: 546 sats for a legacy pay-to-public-key-hash output, 294 sats for pay-to-script-hash, and 330 sats for native segwit and taproot outputs. At a price near $90,690, 546 sats is about 50 cents, so that limit is a technical rule rather than a meaningful amount of money.
The practical takeaway: tiny balances in older address types can cost more to move than they are worth. If a wallet holds a few hundred sats in a legacy address, check the fee estimate before consolidating. Sometimes the cheapest move is to leave it and use a newer address type next time.
Keeping Satoshi Records for the CRA
The Canada Revenue Agency treats crypto-assets as a commodity, so disposing of bitcoin, whether by selling, trading, spending, or gifting it, generally produces a capital gain or loss, or business income if you are trading as a business (CRA crypto-asset tax guidance). The CRA expects the fair market value in Canadian dollars at the time of each transaction, which means the CAD figure matters more than the satoshi count for the tax calculation itself.
Record both anyway. For every purchase and sale, keep the CAD amount, the bitcoin or satoshi amount, the fee, the timestamp, the wallet address, and the transaction ID. The satoshi figure lets you match a receipt to one specific on-chain transaction; the CAD figure supports the cost base you report. A photo of the machine receipt plus the wallet entry covers both with almost no effort.
Frequently Asked Questions
What are sats, and are they a separate coin?
No. Sats and satoshis are the same thing: the smallest unit of bitcoin, at 0.00000001 BTC. There is no separate satoshi network, token, or blockchain. Anything marketed as a distinct “Satoshi coin” is a different asset using the name, not bitcoin divided into smaller pieces.
How many sats should I buy each month?
There is no correct number, and anyone who gives you one without asking about your income, savings, and debts is guessing. A common approach is a fixed Canadian dollar amount on a fixed schedule, so the satoshi count rises when the price drops and falls when it climbs. Keep it small enough that a 50 percent drawdown would not change your plans, and never fund it with borrowed money or a card balance you cannot clear.
Why isn’t the Bitcoin price shown in sats?
Mostly habit and unit size. Quoting a whole bitcoin in dollars matches how people compare other assets, and a satoshi price would be a long decimal that changes constantly. At $90,690 CAD per bitcoin, 1,000 sats costs about 91 cents, which is a perfectly usable number for small purchases. Some wallets already flip the display, and a few quote “dollars per million sats” for this reason.
How do I convert satoshis to bitcoin?
Divide by 100,000,000. So 250,000 sats is 0.0025 BTC, and 55,000 sats is 0.00055 BTC. Most wallets let you switch the display unit in settings, and block explorers show both. On a receipt, multiply the BTC figure by 100,000,000 and compare it against your wallet balance.
How many satoshis will the average person own?
Divide the 2.1 quadrillion total supply by roughly 8 billion people and you get about 262,500 sats each. That is an arithmetic exercise, not a forecast. Coins are unevenly distributed, some are lost forever, and plenty of people will hold none. It is still a useful way to picture the supply: split across everyone alive, the whole asset is a fraction of a coin each.
A satoshi is a unit of measurement, not an investment thesis. It exists so a fixed supply of 21 million coins can be divided into amounts small enough to buy with cash, split between wallets, and priced against a paycheque. The next time a receipt throws a long string of digits at you, multiply or divide by 100,000,000 and the number becomes something you can check. To see what a cash purchase delivers, find a machine near you on our Bitcoin ATM locations page and read the rate and fee on screen before inserting notes.