Email Size Calculator
Gmail clips messages above 102KB. Outlook stops syncing attachments above 25MB. This tool tells you whether you'll trip either limit.
Sums plain-text body, HTML body, inline-image Base64 expansion (×1.37), attachment Base64 expansion. Flags Gmail clip risk and Outlook attachment limits.
Before sending a large HTML email or one with multiple inline images. Especially before a newsletter send.
FAQ
What does Gmail clipping actually do?+
Truncates the message body and shows a 'View entire message' link. CTA links below the cut still work via that link, but tracking pixels at the bottom of the body don't fire reliably.
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Articles, glossary entries, and other tools on the same topic.
You ran the math. Outsolvi makes it real.
Calculators tell you what the number should be. Outsolvi tells you what your number actually is — confidence-scored opens, real reply sentiment, live deal-level signal across Outlook and Gmail. From $7/user/mo yearly, 14-day free trial.
See it on your own inboxNate built Outsolvi after watching every email-tracking tool he had ever used lie to him about opens. Outsolvi runs Tier 1 to 5 confidence scoring on every open, native in Outlook and Gmail, so the number on the dashboard is one a rep can actually act on.
We update these pages when the underlying mechanics change — new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.