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Free tool

Gmail warm-up calculator

Pick your mailbox type, start date and target emails a day to see a day-by-day warm-up schedule and when you reach the target.

Planning.

DayDateEmailsTotal so far

Google's own limits

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Runs in your browser. Nothing you enter is sent anywhere and nothing is stored.

How to use it

  1. Choose the kind of mailbox. A personal Gmail has no company domain reputation of its own, so it stays at 20 a day.
  2. Pick the day you will send your first email, and the number of emails a day you want to reach.
  3. Read the plan. Each row is one sending day. The day you reach your target is at the top.

Weekdays only by default, because cold email sent on a weekend is read less. Tick the box to count weekends.

What good looks like

This is the rule Honest Intros follows when it sends for you: 20 emails on the first sending day, ten more each sending day, and never more than 50 a day. A personal Gmail stays at 20. A mailbox that sends nothing for a while starts low again, because a sudden jump from nothing is what filters notice.

The ramp counts sending days, not calendar days, so a plan that skips weekends takes a little longer on the calendar. Our guide to warming up your own Gmail explains why slow is safe.

This is our own sending rule, not a schedule Google publishes: Google gives limits, not a warm-up plan.

Questions

How many cold emails can I send per day from Gmail?

Google's limits are far higher than a safe cold email rate: about 500 a day for a personal account and 2,000 for Google Workspace. We send at most 50 a day because reputation, not the limit, decides whether you reach the inbox.

How long does it take to warm up a mailbox?

On our rule, three sending days to reach 40 a day and four to reach 50: 20 on the first day, then ten more each sending day, capped at 50. A personal Gmail stays at 20.

Does warming up mean sending to my own addresses?

No. Our ramp is a rising number of real first emails, each written for the person who gets it. Sending to yourself in a loop teaches filters nothing and looks like what it is.

More free tools: Cold email checker · DMARC checker · Subject line checker · Cold email legal checker · Reply classifier. All of them run in your browser; nothing you type is sent to us.

See what it would write for you

Paste your website. Honest Intros learns what you sell and shows who it would write to, and what it would say.

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Read next

  • Warm up the inbox you already useWarming up an existing Gmail or Workspace mailbox for cold email: what Google advises, a day-by-day schedule from 20 to 50 a day, and when to slow down.
  • The 5,000-a-day bulk sender ruleWho Google counts as a bulk sender, what counts toward 5,000, why it is permanent, and the arithmetic for someone sending cold email from their own mailbox.
  • Can cold email get Gmail suspended?When Google pauses or suspends sending from a Gmail or Workspace account, for how long, and the habits that keep a mailbox used for cold email safe. Quoted from Google.
  • AI SDR hallucinated emailsWhy AI sales agents send emails with made-up facts, a catalogue of the failure types with fictional examples, and the checks that catch each one before anything is sent.