Tool

Core Web Vitals Budget Calculator

Calculate frontend byte budget from LCP, TTFB and throughput values.

Inputs

Calculate frontend byte budget from LCP, TTFB and throughput values.

Target LCP (sec)

TTFB (ms)

Throughput (Mbps)

Estimated Result

Total Frontend Budget

1,709 KB

JS Budget

598 KB

CSS Budget

256 KB

Image Budget

684 KB

Details

Font Budget171 KB

LCP Window2

Throughput10 Mbps

Formula Note

budget = (LCP - TTFB) * throughput * efficiency

Assumptions

• Results are estimates based on your inputs.

• Outputs are for decision support and not a final commercial quote.

Frequently Asked Questions

Does this tool fetch live data?

No. It runs fully in-browser with your own inputs.

How should I use this output?

Use it as a baseline during architecture and budget planning.

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