Home / Speed-to-Lead Calculator
Free tool · Live calculations

Your leads are calling someone else
while you get back to them.

Studies show the first 5 minutes after a lead submits a form is the difference between a customer and a missed opportunity. Plug in your numbers below to see how much revenue your slow follow-up time is costing you every month.

more likely to qualify a lead when you respond within 5 minutes vs. just 30 minutes. Most companies wait over 47 hours on average. Source: Harvard Business Review · Lead Connect
Your numbers

Tell us about
your lead flow.

Monthly leads Form fills, calls, demo requests
/ MO
Average customer value Lifetime value or first sale
$
Your current close rate Leads → customers
%
How fast do you respond? Average time to first contact
Under 5 min
5–30 min
30 min – 1 hour
📅 Same day
📆 Next day or later
The cost of slow follow-up

You’re losing this much every month.

At your current speed: 30 min – 1 hour vs under 5 min
Monthly revenue lost to slow response
$0
/ month
That’s a yearly loss of:
$0
Where the money goes
Leads per month 100
Effective conversion (current speed) 9.3%
Customers / month (current) 9
Customers / month (under 5 min) 15
Lost customers / month 6

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The research

This isn’t an opinion.
The data is brutal.

21×

The 5-minute window

You’re 21x more likely to qualify a lead when you contact them within 5 minutes vs. 30 minutes. After that, conversion rates fall off a cliff.

MIT Lead Response Study
78%

The first responder wins

78% of customers buy from the first company that responds to their inquiry. If you’re second, you’re basically last.

Lead Connect Study
47hr

The industry average

The average B2B company takes 47 hours to respond to a lead. Most never get back to them at all. There’s a reason most marketing money gets wasted.

Harvard Business Review
A note on these numbers

This calculator estimates revenue lost from slow lead response based on widely-cited studies (HBR, MIT, Lead Connect, InsideSales) showing how much conversion rates drop as response time increases. Your actual results will vary based on your industry, lead source, sales process, and offer strength. The point isn’t to predict your exact loss — it’s to show you the order of magnitude. If you’re responding in hours instead of minutes, the difference compounds quickly.

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