Work · Utility calculator
Inbox Zero Time Cost Calculator
Find out how much of your working year is actually just spent managing email.
Instant result
Plain-English why
Copyable takeaway
What this means
Calculates how much time email actually consumes annually and expresses it in salary cost and equivalent working weeks.
Formula used
annual_hours = (emails_per_day * time_per_email) * working_days. salary_cost = annual_hours * hourly_rate.
Worked example
80 emails/day at 3 mins each = 940 hours/year. Plus occasional out-of-hours checking = 1,044 hours (26.1 working weeks).
Common questions
Can I use this internationally?
Yes. Currency selectors are display-only unless a tool explicitly says otherwise; no currency conversion is performed.
How exact is the result?
It follows the published Technofatty formula for this tool, but real life can add fees, rules, timing quirks, and context.
Plain-English summary
1,044 hours/year on email. 26.1 working weeks. £24,993 in salary time. 50.0% of your working hours.
This section translates the result into a short, direct takeaway rather than leaving the page at a bare number.
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