About this site

Capital Gains Tax Calculator answers one question well: federal + state capital gains, computed together.

It is deliberately narrow. A single-purpose tool can carry the statutory detail a general-purpose calculator has to average away, and that detail is usually the whole answer.

No sign-up, no data collection

The calculator runs entirely in your browser. Nothing you enter is transmitted or stored, and there is no account to create.

How it is funded

display + tax-software affiliate. Advertising never sits above the tool, never sits beside an input where a mis-tap is likely, and never reflows the page.