Open source
CWV Budget Calculator
GitHub: cwv-budget-calculator
Answer first: Clone cwv-budget-calculator, follow the README, and replace branding. We use these kits to accelerate discovery prototypes.
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Assign budgets
Green targets mirror Google’s “good” thresholds. Adjust page count to see total risk budget.
LCP status
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INP status
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CLS status
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Updated Jul 7, 2026
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