What does an hour of downtime actually cost you?

Outages are easy to tolerate in the abstract and hard to ignore once they carry a number. Put your figures in below — nothing is sent anywhere.

Annual revenue

Employees affected

Average annual salary

Downtime hours per year

Revenue loss assumes trading hours of 8×5. Staff cost assumes 2,080 working hours a year.

Cost per hour of downtime—

Revenue lost plus staff time paid for but not productive.

Lost revenue / hour—

Idle staff cost / hour—

Total at your current downtime—

For context

What each SLA tier actually permits.

“Three nines” sounds close to perfect until you write it out as time. This is the allowance the number really buys you.

UptimeDowntime / yearDowntime / monthCost / year

99%3d 15h7h 18m—

99.9%8h 46m43m 50s—

99.95%4h 23m21m 55s—

99.99%52m 36s4m 23s—

More calculators tools

Configuring DNS, TLS and email authentication properly — without breaking live traffic — is part of our cybersecurity and managed services work.