Critical CSS Calculator
Analyze critical vs. deferred CSS to estimate render-blocking savings and inline readiness.
How to Use the Critical CSS Calculator
- Enter total and critical CSS sizes in KB.
- Enter total and above-the-fold CSS rules.
- Set connection speed in Mbps.
- Click Calculate for render savings analysis.
使用例
- •Critical path optimization
- •First paint acceleration
- •CSS delivery strategy planning
計算式
Savings = (Total - Critical) × 8 / (Mbps × 1000) × 1000 ms
よくある質問
How accurate is this calculator?
Results are based on standard industry formulas and are suitable for preliminary estimates.
What units are used?
Standard IT units (requests/sec, ms, %, USD) are used unless otherwise noted.
Is it free?
Yes, all calculators are completely free.