Almost every missed deadline comes from the same sum done wrong: people divide the work by their best week rather than their average one, and then add nothing for the weeks that disappear. Two small errors compound into a date that was never possible.
Free, no sign-up. Worked out in your browser, nothing sent anywhere, and the result imports into EvyOS.
20 weeks of work, stretched by the 2 weeks a quarter you lose. That difference is 3.6 weeks, and it is the part almost every estimate leaves out.
To hit 6 December 2026 you would need 3.7 units a week rather than 2. Either the scope comes down or the date moves — and picking now is much cheaper than finding out in the last fortnight.
This result contains something worth keeping.
Send it to EvyOS →Nothing has left this device. The link carries the result in the part of a URL browsers never send to a server, and you will see exactly what it is going to create before anything is saved.
Not your best one. Look at the last month and take the middle, not the peak — that peak is why the estimate was wrong last time.
Most people lose two or three a quarter to illness, travel, work and life. Nought is not a real answer.
The gap is the finding. Either the scope comes down or the date moves, and choosing now is far cheaper than discovering it later.
This does the arithmetic properly. You give it the amount left, the rate you genuinely manage, and how many weeks a quarter you lose to illness, travel and everything else. It gives you a date, and the honest gap between that and the date you were hoping for.
The uncomfortable version is usually the useful one. A finish date you can defend is worth more than one that keeps you calm until October.
This works something out and then forgets it. It cannot tell you whether the number moved, because it has no memory of the last time you ran it and no idea what you did in between. Every calculator on the internet has that limit, and if it has never bothered you then this one is yours for free for good.
EvyOS is the same structure with the work recorded against it. Send the result across and it becomes real goals, tasks or habits with their dates — then the next answer is computed from what actually happened rather than from what you remember typing.
Goals, projects, tasks, habits and skills in one system, with the work logged against what it belonged to.
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