What Zcash is worth as a share of Bitcoin, two ways. Fully diluted value (FDV) is price times the supply cap: both chains cap at 21,000,000 coins, so ZEC's FDV as a share of BTC's is exactly the ZEC/BTC price ratio as a percentage.
Market cap is price times the coins mined so far. Bitcoin has issued about 95% of its cap and Zcash about 81%, so by market cap ZEC is a smaller share. The gap between the lines is the supply Zcash has yet to emit, relative to Bitcoin.
ZEC supply is the node's consensus chainSupply; BTC supply follows its deterministic halving schedule. Prices are daily closes. Log scale when the window spans a wide range.
ZEC FDV % of BTC was 1.54% on 2026-10-02, the last full day of data. That is 19.9% higher than 28 days ago, when it was 1.29%.
🔗 permalink ⇆ compareFully diluted value (FDV) prices every coin that will ever exist: today’s price × the supply cap. Zcash and Bitcoin both cap at 21,000,000 coins, so ZEC’s FDV as a share of BTC’s is exactly the ZEC/BTC price ratio, read as a percentage. The same cap is what makes the comparison fair: neither side is flattered by a bigger or smaller coin count.
The market-cap line counts only coins mined so far. Bitcoin has issued about 95% of its cap; Zcash about 81%, because it launched seven years later. So by market cap ZEC is a smaller share of Bitcoin than by FDV, and the gap between the two lines is the supply Zcash has still to emit relative to Bitcoin. It narrows with every block, on a schedule the halvings fix in advance.
Neither line is a forecast. FDV assumes today’s price holds for coins that arrive over the next century. It is a way to compare two assets on the same footing, not a valuation of either. For what ZEC itself is worth by coins already mined, see market cap.