Count the initial view separately
The calculator multiplies image count by average file size and adds your other page assets. Its budget is your assumption, not a universal threshold. Count images fetched on first load here; inspect lazy-loaded galleries separately. Test the final artwork at the actual display size and connection conditions.
From a worksheet to a decision
Use the result with the people responsible for the project. Keep assumptions separate from verified facts, assign the next action and revise the document when the scope changes. The contents of these tools stay in your browser unless you choose to include them in a project inquiry.
Work through it here.
Your entries are processed in this browser. No account or email is required to download.