AI Token Cost Calculator — calculate ai token cost for tech projects. Formula, specs, and practical notes.
Cost per request = (Input tokens × Input $/1M + Output tokens × Output $/1M) ÷ 1,000,000. Pricing is per million tokens; both input and output are billed separately at different rates.
Monthly cost = Cost per request × Requests per day × 30. Scale to your actual daily call volume and multiply by 30 days.
Worked example: 1,000 input tokens + 500 output tokens with GPT-4o ($2.50 input / $10.00 output per 1M). Cost/request = (1,000 × 2.50 + 500 × 10.00) ÷ 1,000,000 = ($2.50 + $5.00) ÷ 1,000,000 = $0.0000075. At 100 requests/day: daily = $0.00075. Monthly = $0.0225. Very cheap — but at 100,000 requests/day, monthly cost becomes $22.50, and GPT-4 at the same volume costs $330/month.