Last updated 3 September 2026
How it's worked out
Quantity purchased is the amount invested divided by the buy price. Current value is that quantity multiplied by the sell price. Profit or loss is simply the difference between the two — and the percentage is that difference relative to what you put in, the standard way returns are measured.
What this figure leaves out
This works out the difference between what you paid and what a position is worth. Two things it does not account for can move the real number a long way.
Fees are the first. Exchanges charge on the way in and on the way out, spreads widen the gap further, and network fees apply on top when you move coins between wallets. On frequent small trades these can eat a gain that looks healthy on paper.
Tax is the second, and it is not a minor adjustment. Most countries treat crypto disposals as taxable events, with rules that vary widely on how gains are calculated, what counts as a disposal, and how long you held. Swapping one coin for another is often taxable even though no ordinary money changed hands. What you owe depends on your jurisdiction and your own circumstances, so treat the output here as a starting figure and get proper advice for anything of size — this is a calculator, not financial or tax advice.
Position sizing and the arithmetic of recovery
The number that matters more than the profit figure is what a loss requires to undo. Losses and gains are not symmetrical: a 20% fall needs a 25% rise to break even, a 50% fall needs 100%, and an 80% fall needs 400%. That asymmetry is why position size is the variable experienced traders control most tightly — a total loss on 5% of a portfolio is recoverable, and the same loss on 50% of it usually is not.
It also puts the profit figure in context. A calculated gain assumes you sold, which means it exists only after the sale is executed and the fees are paid. Unrealised gains on a volatile asset are an estimate of what someone would pay right now, not money you hold.
Assumptions and limitations
What the maths does. It is arithmetic on the buy price, sell price and amount you type in. No live price is fetched, no market data is used, and nothing is predicted — if you enter a hypothetical sell price, the result is equally hypothetical.
What is not included. Exchange trading fees, spread, network or gas fees, withdrawal fees, and slippage on larger orders. On small trades these can be a significant share of the result and can turn a nominal gain into a loss.
Tax is not modelled. Crypto disposals are taxable events in many countries, and how gains are calculated — along with the record-keeping expected of you — varies considerably. Check the rules where you live, or ask a tax professional.
This tool is not an argument for trading. Nothing here suggests any trade is a good idea. Crypto assets are highly volatile, are not covered by the deposit or investor protection schemes that apply to bank accounts in most countries, and losing the full amount invested is a realistic outcome. A calculated profit figure is a piece of arithmetic, not a forecast and not a recommendation.
Assumptions that apply to every finance calculator here
Currency is a display choice only. Changing the currency symbol relabels the output; it does not convert anything and no exchange rate is used anywhere in this tool.
Tax and lending rules vary by country. Nothing here is adjusted for the rules where you live — income tax, capital gains tax, stamp duty, lending caps, affordability tests and consumer-credit regulation all differ, and several of them can change the real answer materially.
Rates and returns are not guaranteed. Any rate you enter is treated as fixed for the whole period. Real interest rates move, real investment returns vary year to year and can be negative, and past performance does not predict future results.
This is an estimate, not advice. The result is arithmetic on the numbers you typed. It is not an offer, a quote, an approval, an investment recommendation or financial advice. Before committing to anything, get figures from the actual lender, provider or a qualified adviser in your country.
Common questions
Why do I have to enter the prices myself?
This tool runs entirely in your browser with no server and no live data feed, so it has no way to fetch a current price — and never sends what you type anywhere. Enter your own buy and sell prices from your exchange or wallet.
Does this account for trading fees?
No — it's a straightforward calculation from price and amount. Most exchanges charge a fee on each trade, which would reduce the actual profit shown here, so build that in yourself if you want a fully accurate figure.
How is the quantity calculated?
Quantity is simply the amount invested divided by the buy price — how many coins or tokens that investment purchased, before any fees.