---
title: "Cold Email Infrastructure Calculator: Inboxes, Domains & Cost"
description: "Work out how many inboxes and domains your target send volume needs, and what it costs, for prewarmed or fresh inboxes on Google, Microsoft 365 or Azure."
url: https://warminboxes.com/calculator
breadcrumb: "Home > Calculator"
---
# Calculator

Work out how many inboxes and domains your target send volume needs, and what it costs, for prewarmed or fresh inboxes on Google, Microsoft 365 or Azure.