Free tool
If I Had Bought... Crypto Calculator
Pick a coin, a past date, and an amount of money — the calculator pulls the historical close price for that day, computes how many coins your dollars would have bought, and multiplies by today's live price for current value and total return. Useful for retrospective decisions, content posts ("if you'd put $1,000 into BTC five years ago…"), and rough sanity-checks of your own past trades.
The calculator handles dates back to roughly the coin's Binance listing — typically late 2017 for major pairs. Picking a date before that flags a no-data message rather than silently shifting forward to a date that exists in the data and pretending the answer is meaningful. The earliest available date for each coin is surfaced under the date input so you don't have to guess.
Closes from Binance (BTC/USDT). Older than the listing date will flag a no-data result.
Result
No data.
How it's calculated
Coins acquired = USD amount ÷ historical close on the chosen date. Current value = coins acquired × today's live spot price. ROI = (currentValue − amountInvested) ÷ amountInvested × 100. Daily closes come from Binance and go back to roughly the listing date for each coin — older dates than that flag a no-data message rather than silently extrapolating.
The price used is the daily close, so if you'd actually executed on the morning of a green day you would have gotten a better fill than the close suggests; on a red day, worse. For long lookback windows this rounds out; for short ones the daily-close approximation is the right granularity for back-of-envelope work.
Worked example
Invest $1,000 in BTC on January 1, 2022 with a close around $46,300: you'd have ~0.0216 BTC. At a current price of $62,000, that's worth ~$1,339 — a 33.9% total return.
ETH example: $500 invested on January 1, 2023 at a close around $1,200 buys ~0.417 ETH. At a current price of $3,500 that's worth ~$1,458 — a 191.6% return over the same window. The calculator runs the same math live so you can change coin, date, or amount and see the number update.
If I Had Bought Bitcoin Calculator: the classic question
"If I had bought Bitcoin at [some past date], what would it be worth today?" is the most-asked retrospective question in crypto. This if-I-bought-bitcoin calculator answers it directly using actual Binance daily closes — no extrapolation, no guesstimation. Pick the date the most accurate way: from a journalist's article date, your old browser history, a screenshot of an order ticket, or just a year you remember scrolling past a tweet. The earliest available date is surfaced on the form so you can't accidentally pick a date before Bitcoin's BTCUSDT pair started trading.
Crypto Investment Calculator across coins
The same form works for any coin Binance trades against USDT. Pick ETH, SOL, BNB, ADA, DOGE, AVAX or any of the 30+ supported assets and the calculator pulls that coin's price history. Useful for comparing realised opportunity cost — "would I have made more on ETH than on BTC over the last three years?" — and for backtesting altcoin holds where the volatility was extreme enough that headline numbers feel disconnected from reality.
What if Bitcoin had been my whole portfolio
Variant of the same question, useful for asset-allocation what-ifs. Set the USD amount to your full portfolio size from some past date, the coin to BTC (or any other), and read the current value. Compare to your actual portfolio's current value across whatever mix you held. The gap is the realised opportunity cost (or saved blow-up risk, in years where the coin underperformed safer assets). Past performance is not a guide to future returns — but it's a useful reality check for stories you tell yourself about what you should have done.
FAQ
How does the 'if I bought Bitcoin' calculator work?
Choose a coin, a past date and an amount of money. The calculator looks up the historical price on that date, works out how many coins you'd have bought, and multiplies by today's price to show current value and ROI.
What if I had invested $1,000 in Bitcoin?
Enter $1,000 and your start date and the tool shows exactly how many coins that bought back then and what they're worth now, including total return as a percentage.
Is past performance a guide to future returns?
No. This tool is for historical illustration only. Crypto is volatile and past gains don't predict future results — never invest based on backward-looking numbers alone.
Which coins and dates are supported?
Major coins with sufficient price history are supported. The further back your date, the longer the price record needed; the calculator will flag if data isn't available for your selection.
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