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Outbound calculator

Move the sliders. The calculator sizes the sending infrastructure a cold email program needs and estimates the meetings it should produce, using the same rules we use to plan client programs: 25 to 50 emails per inbox a day, two or three inboxes per domain, and the reply-rate bands from the 2026 benchmark reports.

Your program

How many new people enter the sequence each month.
Touches in the email sequence. Four to seven touches across email and LinkedIn is the range the data supports.

Your infrastructure

We run 25 to 50. Past 50, reply rates and placement start to fall.

Your results

3.4% was the 2025 average in Instantly's report. Top quartile 5.5%, top 10% over 10%.
Meetings a month, estimated00 meetings per 1,000 emails
Emails a month0
Emails a day0
Inboxes needed0
Sending domains0
Replies a month0
Positive replies0

Each box is a sending domain. Each bar inside it is an inbox.

Rough infrastructure cost a month$0At about $3 an inbox and $1.20 a domain. Tools, data and people are separate.
Want this built for you?Programs from $2,000 a monthBook a 30-minute call

Estimates. Replies and bounces remove people from the sequence, so real send counts run 15% to 25% under these figures. Every market is different, and we'll give you a range for yours on a call.

How the math works

The rules behind the numbers, with sources.

Why 25 to 50 emails per inbox?

Hunter's 2025 data found inboxes sending 20 to 49 emails a day replied 27% above average, while volumes over 100 a day hurt deliverability. Our programs run 25 to 50 per inbox with warmup on top. Read how many cold emails to send per day.

Why two or three inboxes per domain?

Domain reputation is shared by every inbox on it. Keeping each domain at 100 to 150 cold emails a day limits the damage if one has a bad week, and stays far below Gmail's 5,000-a-day bulk sender line.

Where do the reply and meeting rates come from?

Instantly's 2026 benchmark report puts the average reply rate at 3.43% of emails sent, with the top quartile above 5.5%. Across our programs about a third of replies are positive and about half of those become held meetings. See the cold email benchmarks guide.

What isn't in the cost?

Data, verification, the sending platform, warmup, copy and the people running it. The infrastructure line is only domains and inboxes, so you can see how cheap the plumbing is compared with the work.

Tell us who you want to meet.

Thirty minutes with the founder. You'll leave with a clear picture of your market, what a campaign would look like and what it would cost.

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