The what-if investment calculator
Every number here is historical fact. Pick an asset, an amount, and a year, and the calculator looks up the real closing prices and tells you exactly what that money would be worth today. It isn't a projection, a forecast, or a compound-interest calculator that assumes some fixed annual return — nothing here guesses the future. It only reports what already happened.
You'd have
$3,318
from $1,000 invested — up 232%.
What you can calculate
Eleven assets, each with its own earliest year of data. Open any one to run every start year we hold for it.
Three (and a bit) worked examples
The same $1,000, invested once, held to today. Not every what-if is a triumph — that's the point of showing the real numbers.
What this doesn't account for
These figures track price alone. They leave out dividends, so income-paying holdings like the S&P 500 look a little worse here than a real total-return investor would have done, and gold or silver — which pay nothing — are unaffected.
They also ignore fees — commissions, spreads, fund expenses — and any tax you'd owe on the gains when you sold. Both quietly shave real-world returns below the clean numbers on screen.
Finally, the roster is a survivor's list. It's built from assets still worth talking about today, which flatters the average — survivorship bias means the companies that went to zero never make the menu. Treat every result as a single history, not a promise.
Where the numbers come from
Prices are sourced from Twelve Data. The inflation adjustment — the “in today's dollars” figure — uses the U.S. Consumer Price Index published by FRED, the Federal Reserve Bank of St. Louis. Data is refreshed on a regular cadence, and each asset carries its own coverage window, shown in the table above.
Read the full methodology for the exact sources, the per-asset coverage detail, and the precise math behind every result.
Questions people ask
Is this a “what if I had invested” calculator?
That is exactly what it is. Rather than projecting future growth, it answers the retrospective question — what if I had invested a set amount years ago? For instance, $1,000 put into the S&P 500 at the end of 2010 would be worth about $5,899 today, a 5.90× return. Change the asset, amount, or year and the answer updates instantly.
Can I use it as a “what if” stock calculator?
Yes. Pick any individual stock we cover — Apple, Nvidia, Tesla, Microsoft, or Amazon — choose the year you wish you'd bought in, and the what-if stock calculator works out the shares your money would have bought and what they'd be worth now. Indexes, gold, silver, and crypto all behave the same way.
What makes this a “what if” investment calculator rather than a forecast?
Every figure is drawn from real historical closing prices, so this what-if investment calculator reports fact, not a prediction. A forward-looking tool assumes a fixed annual return and guesses ahead; this one only looks backward at what markets actually did — including the years they fell hard.
What does the “what if” in this stock calculator actually compute?
The stock calculator's what-if is a plain, honest sum: your money buys a number of shares at the real price on your start date, and those same shares are valued at the most recent price. A vivid case — $1,000 in Bitcoin at the end of 2015 would be about $149,611, a 150× return — though plenty of other entry points went sideways or lost money.