Five calculators, all of them running entirely in your browser. Nothing is sent to a server, nothing is stored, and none of them ask for an email address before showing you a number. View the page source if you would rather confirm that than take it on trust.
The five calculators
- Domain Portfolio Triage Tool — Answer a short set of questions about one domain and get a recommendation: develop, lease, list, hold or drop. It is a structured way of thinking, not an appraisal.
- Domain Carrying Cost Calculator — Work out what a domain has already cost you, and what it will cost by year five and year ten. Renewal prices are not flat, and the total is usually larger than owners expect.
- Break-Even Domain Sale Price Calculator — Find the sale price that returns what a domain has cost you, and the price that delivers a target return after commission. Then check it against your real sell-through rate.
- Parked vs Developed Domain Calculator — Compare a parked domain against a developed one over ten years. It is a sensitivity check, not a forecast: it shows what would have to be true for development to pay.
- Domain Lease Pricing Calculator — Turn an estimated domain value and a target annual yield into an indicative monthly lease rate and a total across the term. Indicative is the operative word.
Why the assumptions are printed on the page
Every calculator here shows its working. That is not a stylistic choice: in this subject the assumptions are the answer. A domain valuation tool that hides its model is not telling you what your domain is worth, it is telling you what its model thinks, which is a different and much less useful thing. The break-even calculator is the clearest example — change the assumed sell-through rate from two percent to one and the portfolio figure doubles, which means the sell-through assumption matters more than every other input combined. A tool that buried that would be actively misleading.
What each one is for
The carrying cost calculator answers the simplest and most avoided question: what has this domain actually cost you so far, and what will it cost if you keep holding it? Renewal fees compound quietly, and across a portfolio the total is usually larger than owners expect.
The break-even sale price calculator takes that cost and adds commission and time, then tells you the number a sale has to clear before it was worth registering the name. Run at portfolio scale it produces the figure that matters most: what a single sale has to cover, given all the names that will never sell.
The parked versus developed comparison is deliberately framed as a sensitivity check rather than a forecast. The revenue you would earn from a developed site is a guess by definition, so the tool tells you what would have to be true for a build to pay — not whether it will.
The lease pricing calculator exists because no public dataset of domain lease rates does. It applies a practitioner heuristic and says so, and it forces the setup cost into view, which is the thing that quietly makes most small leases uneconomic.
The portfolio triage tool is a structured way of thinking about one domain at a time. It is not an appraisal and does not pretend to be. Its scoring is printed so you can disagree with it, and its most heavily weighted input is inbound inquiry history, because that is the one signal that reliably predicts an end-user sale.
What none of them can tell you
No calculator on this site knows what your domain is worth to the specific buyer who wants it, and that is the only valuation that ever actually matters. These tools model cost, commission, time and opportunity — the parts of the problem that are arithmetic. The rest of it is judgement, and the strategy pages are where that gets discussed.
A note on how they are built
These are plain HTML pages with a small amount of JavaScript. There is no account, no session, no analytics on the inputs, and no request made when you type a number. They also work with JavaScript disabled in the sense that matters: the explanation below each tool is the substance of the page, and it renders regardless.