Prompt Engineering Cost Calculator
Calculate the true cost of iterative prompt development including API tokens and engineer labor time.
Inputs
Results
Total development cost ($)
$125.12
API cost ($)$0.12
Labor cost ($)$125
Total engineer hours1.67
Total tokens consumed16,000
API cost share (%)0.1%
Production cost per call ($)$0.01
Break-even production calls20,854
Labor Cost (%)99.9%
How to Use This Calculator
- Enter the typical Prompt Tokens and Completion Tokens for your task to set the per-iteration token cost.
- Set Development Iterations — the number of prompt variations you test (typical projects run 10–50 iterations).
- Enter Input Price and Output Price per 1M tokens from your LLM provider's pricing page.
- Set Engineer Hourly Rate (fully loaded) and Minutes per Iteration to capture the labor cost alongside API spend.
- Review Total Development Cost, API vs. Labor cost split, and Break-Even Production Calls to justify prompt optimization investment.
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