API Rate Limit Calculator
Calculate optimal rate limit settings from expected traffic, peak multipliers, and SLA requirements.
Inputs
%
Results
Peak RPS
300
Rate limit / window
21,600
Per-user limit / window108
Throttle threshold (RPS)360
Daily requests (avg)8,640,000
Daily requests (peak)25,920,000
Est. throttled % at 1.5x peak20
How to Use This Calculator
- Enter your Average Requests per Second and Peak Traffic Multiplier (e.g., 3x for traffic spikes).
- Set the Burst Window (seconds) and Safety Margin % to add headroom.
- Enter Max Concurrent Users and Average Requests per User per Minute.
- Review Peak RPS, Rate Limit per Window, and Per-User Rate Limit.
- Use the Throttle Threshold RPS to configure your API gateway or load balancer limits.
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