Cold email send-time calculator

What the calculator gives you back

Choose one of the nine recipient regions and one of four audience profiles, and the panel returns two send windows with the reasoning behind each, the weekdays worth prioritising, a touch cadence with the day numbers written out, and the periods to stay away from. A copy button puts that whole recommendation on your clipboard as plain text, ready for a campaign brief.

This is a heuristic drawn from the shape of a working day for each of those groups. It is not the output of a study, and dressing it up as one would make it less useful, not more. The region you select labels the recommendation rather than shifting it, because the hours are already expressed in the reader's own clock — picking Sydney or Berlin changes whose morning you are aiming at, not which part of the morning.

Why every hour here is the reader's, never yours

A send window only means something on the clock of the person receiving it. Nine in the morning where you sit is the small hours for one part of your list and mid-afternoon for another, so a single scheduled hour scatters an international list across every part of their day. That is why the tool never asks where you are.

Two things follow. A list spread over several regions needs several scheduled sends rather than one, which is arithmetic you either automate or do by hand. And the recipient's timezone is a data-quality problem before it is a scheduling problem: if the field is blank, or guessed from a country code that spans four zones, the schedule inherits that error silently. Getting that field right pays more than tuning the window by half an hour.

How the four audience profiles differ

Switching audience moves both the hours and the number of touches, because the rhythm of a working day is not the same for a founder and a staff engineer. Every profile steers toward the middle of the week and away from the Monday backlog and the Friday wind-down.

Executives and VPs

Two narrow windows at the outer edges of the day, on the reasoning that the middle is already booked. It also carries the shortest cadence on offer, three touches inside roughly ten days, with each message kept deliberately brief.

SMB owners

Early, before the day takes the decision out of their hands, plus a slot once lunch is over. Four touches across about a fortnight, opening with a concrete outcome rather than an introduction.

Developers and technical buyers

Later than everyone else, and pointedly not first thing: mid-morning once the day is under way, then mid-afternoon at a natural context switch. Three touches over roughly twelve days.

General business

The broad default. A morning window while inboxes are being cleared, a dependable one after lunch, four touches over about two weeks and a different angle on each.

How much timing can actually move

Timing is a tie-breaker rather than a lever. It decides where in the queue you sit when somebody opens their inbox, which helps a relevant message and does nothing at all for an irrelevant one. Sort the list and the opening line first, then take the window as the free improvement on top.

Consistency also beats precision. Sending at a similar hour on a regular pattern is easier for your own team to sustain and reads as more ordinary behaviour than chasing an optimum that moves every quarter. Treat these windows as a starting hypothesis for your market, and the moment you have enough replies of your own to compare against, trust your own numbers over any general recommendation, this one included.