Crypto average price calculator

Before fees, adding two prices and dividing by two is only correct when both purchases contain exactly the same number of units. A new fee changes even that equal-size result. If one buy is larger, its execution price must also carry more weight. The modeled average therefore comes from total cash cost divided by total units.

This distinction matters when averaging down or adding after a rally. A small second order barely moves a large existing position, even if its price is far from the original entry.

The existing average cost is treated as a carried-forward basis that already includes any historical fees. The selected fee rate applies only to the new purchase. It increases cash committed without increasing the entered token count, so the combined break-even price rises.

If your platform deducts fees in tokens, changes the received unit count, or rebates maker orders, calculate from the actual statement instead. The model assumes the entered new units are the units received.

For a quick scenario, two purchase legs are enough. This output is not a tax basis calculation. Tax records may need every fill, disposal, transfer, fee asset, wallet, and identification choice. Keep the exchange export or verified ledger as the source of record.

You can consolidate several earlier fills into the first leg by using their existing total units and weighted average price, then enter a proposed new order as the second leg. That preserves the weighted calculation while making the tool useful for planning the next buy.