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Domain portfolio STR calculator
Compute your annualised sell-through rate. Three numbers — sold, listed, average portfolio age — and you'll see where you land against industry benchmarks.
Formula
In the period you're measuring
Total inventory at start of period
Mean days each domain has been held
How to use this
Fill the three fields above — STR is annualised automatically.
01
Domains sold
How many names you sold in the period. If you're measuring the past year, count last 12 months.
02
Domains listed
The size of your active portfolio at the start of the period (or its rolling average if it grew steadily).
03
Avg portfolio age
Mean age of every domain in days. The annualisation factor lets short-window numbers be compared to industry annual rates.
Industry benchmark: 1–3% is acceptable, 3–5% good, 5%+excellent. We'll show where you land as you type.
Frequently asked
What is sell-through rate (STR) for a domain portfolio?+
STR is the percentage of your portfolio that sells in a given period, annualised so it can be compared across portfolios of different ages. The formula is (Sold ÷ Listed) × (365 ÷ Average Portfolio Age in days).
What's a good STR for a domain investor?+
1-3% is acceptable for established portfolios, 3-5% is good, 5-10% is excellent, and 10%+ is outstanding — usually only seen on tightly curated niche-focused portfolios.
Why annualise instead of just using sold ÷ listed?+
Raw STR depends on how long you've held inventory. Annualising by (365 ÷ avg age) lets a 6-month-old portfolio be compared fairly to a 5-year-old one. Industry benchmarks are always quoted annualised.
Where do I get the 'average portfolio age'?+
Take the date each domain was acquired, subtract from today, average across the whole portfolio. Most registrar exports include acquisition date. If your portfolio grew steadily, half of (today minus the oldest acq date) is a fast approximation.