API Rate Limit Calculator
Token Bucket / Leaky Bucket / Sliding Window
Rate (req/s)
Bucket Capacity / Window Size
Burst Requests
Time Window (s)
API Rate Limiting Algorithm Guide
Algorithm Comparison
- Token Bucket — Allows burst traffic, adds tokens at a constant rate
- Leaky Bucket — Smooths output, strictly controls processing rate
- Fixed Window — Simple counter, has boundary burst issues
- Sliding Window — Smooth counting, avoids boundary bursts
Use Cases
- API Gateway rate limiting (Nginx, Kong)
- User-level / IP-level rate limiting
- Third-party API call quota calculation
- Microservice traffic control