What is this conversion rates calculator?
A free, browser-based calculator that turns your sales-funnel stage counts — leads, inquiries, opportunities, and wins — into the rates B2B sales teams report on: the opportunity rate (商談化率, inquiry → opportunity), the win rate (受注率, opportunity → win), the overall lead → win rate, and each adjacent stage rate. Enter only the counts you have and the rates are computed live, with the exact formula shown beside each one and a funnel chart visualizing the drop-off. Everything runs locally in your browser, so your numbers are never uploaded.
The formulas
- Opportunity rate (商談化率) = Opportunities ÷ Inquiries.
- Win rate (受注率) = Wins ÷ Opportunities.
- Overall (lead → win) = Wins ÷ Leads.
- Inquiry rate (lead → inquiry) = Inquiries ÷ Leads.
How to use it
- Enter the count at each funnel stage — leads, inquiries, opportunities, wins — on the left.
- Read the computed rates on the right — each shows the formula used.
- Check the funnel chart to see where the biggest drop-off happens.
Common use cases
- Diagnosing whether a weak pipeline is a marketing problem (商談化率) or a closing problem (受注率).
- Reporting funnel conversion rates in a monthly sales review.
- Setting stage-by-stage targets to hit a revenue goal.