Zcash only goes onwards. This calculator goes the other way: one click at a time, what your dumbest purchases would be worth in ZEC today.
Every example uses the same day: 1 Nov 2020.
And no bank, no chain-analysis firm, no ex. Nobody would've ever seen you buy it.
Prices from Binance public market data, with Coinbase and CoinGecko as backup. Daily closing prices are used, and dates before 21 March 2019 may not be available. Past performance says nothing about the future. This is a look backwards for fun, not financial advice. What you type stays in your browser. Only the date you pick is sent, to look up that day's price.