Title: Lead Response Time Calculator | Keres AI URL: https://www.keresai.com/tools/lead-response-time-calculator Updated: 2026-10-11 Description: Free lead response time calculator. See how much revenue you can recover by responding to inbound leads in under five minutes instead of hours. Source: https://www.keresai.com/tools/lead-response-time-calculator (HTML). This is a Markdown copy of the page's main content for AI agents and LLM tools. --- # What is slow response costing you? Speed to lead decides the job. See the estimated revenue you can recover by responding to every inbound lead in under five minutes. **Speed to lead** matters: in the Lead Response Management study (15,000 web leads across six companies), the odds of qualifying a lead were 21 times higher when it was contacted within five minutes than at 30 minutes. With the default inputs (200 leads a month, a $700 average deal and a 30-minute response), this calculator estimates **$22,750 a month** recoverable. Its conversion steps are Keres AI assumptions. You can recover $22,750 /mo ≈ $273,000 / year Illustrative model: relative conversion vs. a sub-5-minute response is stepped (≤5 min = 100%, ≤10 = 60%, ≤30 = 35%, ≤60 = 20%, >60 = 10%) against a 25% base close rate. The steps and the base rate are Keres AI assumptions. Treat the result as directional, not exact. ## What does a typical example look like? A business that gets 200 leads a month, closes 25% of them when it responds within five minutes, and averages $700 a deal could close 50 deals worth $35,000. Responding in about 30 minutes, the calculator applies a 35% relative-conversion factor, so it captures about $12,250 now and shows **$22,750 a month** recoverable, or **$273,000 a year**. ## How is the number calculated? Potential revenue = monthly leads × 25% base close rate × average deal value. Current capture = potential revenue × the relative-conversion factor for your response time. Recoverable revenue = potential revenue − current capture. The yearly figure is the monthly figure × 12. ## What assumptions are behind the number? - Faster response raises the odds of qualifying a lead: contacted within five minutes, the odds were 21 times higher than at 30 minutes in this study. *Source: [Oldroyd & InsideSales.com, Lead Response Management Study (15,000 leads, six companies)](https://www.mortech.com/hs-fs/hub/25649/file-13535879-pdf/docs/mit_study.pdf)* - Firms that tried to contact a lead within an hour were nearly seven times as likely to qualify it as firms that tried an hour later. *Source: [Oldroyd, McElheran & Elkington, “The Short Life of Online Sales Leads,” Harvard Business Review (2011)](https://scholarsarchive.byu.edu/facpub/9711)* - The relative-conversion steps (≤5 min = 100%, ≤10 = 60%, ≤30 = 35%, ≤60 = 20%, over 60 = 10%) are a simplified curve that follows the direction of that research. They are not values taken from it. *Keres AI assumption.* - A 25% base close rate for leads answered within five minutes, and the default inputs (200 leads, $700 deal, 30 minutes), are example values. *Keres AI assumption.* ## What should you do with this number? - **Measure your real response time.** For calls, a missed call’s response time is however long the callback takes. For web forms, compare the form timestamp with your first reply. - **Fix the slowest channel first.** After-hours calls and weekend forms usually wait longest. - **Compare the gap with the cost of closing it.** See [how much an AI receptionist costs](https://www.keresai.com/ai-receptionist-cost) and [Keres AI pricing](https://www.keresai.com/pricing). ## Calculator FAQ ### Why does lead response time matter? In the Lead Response Management study of 15,000 web leads, the odds of qualifying a lead were 21 times higher when it was contacted within five minutes than at 30 minutes. See [lead response time](https://www.keresai.com/glossary/lead-response-time). ### How is the recoverable revenue calculated? The calculator takes the deals you would close responding within five minutes (leads × 25% × deal value), applies a stepped factor for your current response time, and subtracts what you capture now. The steps and the 25% base are Keres AI assumptions, so treat the result as directional. ### How do I measure my current lead response time? For calls, it is the time until a person or system answers; for a missed call, it is how long the callback takes. For web forms, compare the form timestamp with your first reply, and use the average over a normal month. ## Keep going [Lead response time](https://www.keresai.com/glossary/lead-response-time) · [Missed-call statistics](https://www.keresai.com/missed-call-statistics) · [AI receptionist](https://www.keresai.com/agents/inbound) · [All free tools](https://www.keresai.com/tools) Last updated October 11, 2026 · [Reviewed by the Keres AI team](https://www.keresai.com/editorial-policy)