Work out stock split adjustment instantly with clear inputs, formula shown and shareable results.
A split multiplies the share count and divides the price by the same ratio, leaving the value of your holding unchanged. The cost basis per share must be divided too, so that any eventual capital gain is measured correctly.
Split adjustment
New shares = old × ratio; new price = old price / ratio; basis divided by the ratio
Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.
No. It only changes the units. Any price reaction is about signalling and improved liquidity, not economics.
So charts and return calculations remain comparable across the split date.