ScopeKit: quote extra website work with a free no-signup calculator

I operate ScopeKit, a tool for freelance web designers handling additions to an existing project.

Here is a fictional example: a client adds an FAQ page. You estimate 3 hours at EUR 60/hour and choose a visible 15% buffer. The proposed fee is EUR 207 before tax; the calculator does not decide the right rate or whether the client owes it.

The free calculator runs in the browser, requires no signup and exports a text estimate:

https://scopekit-web-projects.leo-vlasic.chatgpt.site/free-calculator

After estimating, the useful next step is to write down what the addition includes, what it excludes, and any schedule impact, then ask the client to review it before work starts.

There is also a separate EUR 19 one-time offline toolkit, before applicable tax, for a project brief, change log with approval references, JSON backups and editable client messages. The calculator is free to use independently.

Product and post created with AI assistance; the tool has been functionally tested. It is a workflow aid, not a contract, invoice or verified-signature service.

For designers who quote extra work: which part takes more effort in your current process — estimating the fee, explaining the scope, or keeping track of the client’s decision?