💰 AI API Budget Planner
How many API calls your monthly budget covers
About this calculator
The AI API Budget Planner turns usage forecasts into a monthly dollar figure. Enter expected requests per day, average input and output tokens per request, and your model's pricing — it projects monthly spend, flags the daily run-rate, and shows what happens if usage doubles.
Monthly cost equals requests per day × 30 × (input tokens × input price + output tokens × output price). The planner layers in a safety margin because real usage always exceeds the estimate once a feature ships.
Tip: Set billing alerts at 50, 80, and 100 percent of budget on day one — API bills spike silently, and a runaway loop can burn a month's budget overnight.