API Rate Limit & Cost Calculator

Model your real LLM API cost and whether your rate limit survives peak traffic.

As LLM-API-backed features scale from prototype to production traffic, two separate risks emerge together: cost growing faster than expected as usage scales, and a rate limit set for average traffic silently throttling users during real-world peaks — which tend to run several times higher than daily average, not a flat multiple most teams provision for by default. This calculator runs the actual arithmetic on both: a genuine monthly/annual cost projection from your real token volume and pricing, and a capacity check comparing your estimated peak requests-per-minute against your current limit, with a specific recommended limit that includes headroom.

• →Computes real cost from your actual request volume, token size, and blended per-token pricing
• →Projects estimated peak traffic from your average volume and peak multiplier, not just averages
• →Flags whether your current rate limit will actually throttle requests at that peak
• →Recommends a specific rate limit with 20% headroom above estimated peak, not a vague suggestion
• →Watermarked by Cikal Studio Labs · Works on any device, no install required