How much time does AI actually save developers?
Independent studies (GitHub, McKinsey, Stack Overflow) put real-world savings between 20% and 55% of coding time depending on task type and AI tool depth. Refactors, boilerplate, and test writing show the largest gains; novel architecture and debugging show the smallest. Heavy agentic users (Claude Code, Cursor agent) typically report 10-20 hours per week saved.
Is Claude Code worth the subscription cost?
If you save more than 1-2 hours per week with Claude Code, the subscription pays for itself many times over at typical developer hourly rates. Plug your numbers into this calculator at the Heavy assistance level and compare the dollar savings against the monthly cost - the break-even point is usually under an hour of saved work per month.
How is hours saved calculated in this tool?
The calculator multiplies each weekly input (lines of code, refactors, tests, bugs) by a baseline minutes-saved-per-unit value tied to your AI assistance level: Light (autocomplete only), Moderate (chat plus autocomplete), or Heavy (agentic coding). Totals are converted to hours per week, scaled to 50 working weeks per year, multiplied by your hourly rate for dollars saved, and divided by 8 for equivalent extra workdays.
Does this calculator work for any AI coding tool (Cursor, Copilot, Claude Code, Cody)?
Yes. The calculator is tool-agnostic. Pick the assistance level that matches how you actually use AI: Light fits basic Copilot autocomplete, Moderate fits Copilot Chat or Cursor inline edits, and Heavy fits agentic tools like Claude Code, Cursor agent mode, Aider, or Codex CLI. The math is the same; the per-unit time savings just scale up with deeper assistance.
How can I track my real AI coding stats over time?
This calculator gives you an estimate. To see your actual numbers, install Code Card with one command: npx code-card. It parses your local Claude Code, Codex, and OpenClaw sessions and publishes a public profile with prompt counts, token breakdowns, model usage, contribution heatmaps, and badges. Free, no email required.