Six calculators, one purpose: know the number before you sign anything.
1031ExchangeCalc started as one spreadsheet built to answer a single question before a property sale closed: what does deferring versus paying actually save. It grew into six calculators covering deferred gain, boot, depreciation recapture, straight capital gains, and the 45 and 180-day exchange deadlines, plus a set of state-by-state pages once it became clear the federal number alone wasn't the whole picture.
Every calculator on this site executes in your browser, not on a server. Type a sale price or a basis figure into any tool and that number never leaves your device. There's no account to create and nothing to lose if you close the tab halfway through. The state capital gains pages plug the same client-side math into a different state rate; the mechanics don't change, only the input.
Priya Raman writes the tax and policy content, tying each figure back to IRS guidance and published state rates. Chris Terry founded the site and is responsible for the accuracy of the calculators themselves. Read more about both on the authors page, and see how figures get sourced and updated on the editorial standards page.
None of this is tax or legal advice, and a 1031 exchange has enough failure points that a spreadsheet alone shouldn't be the last word. A qualified intermediary and a tax professional need to sign off before you structure anything real.