Downtime Cost Calculator – Revenue Loss per Hour

Calculate the financial cost of server or application downtime.

About This Calculator

Calculate the financial cost of server or application downtime. Use the calculator above for instant results.

Worked Examples

Example 1: $10M revenue, 2080 business hrs, 4hr downtime

  • $10M/2080 = $4,808/hr × 4 hrs = $19,231 lost

Answer: $19,231 cost

Example 2: $100M ecommerce, 8760 hrs, 1hr downtime

  • $100M/8760 = $11,416/hr | $11,416 per hour of downtime

Answer: $11,416/hour

Example 3: $1B company, 1hr downtime

  • $1B/8760 = $114,155/hr | Major outages cost millions

Answer: $114,155/hour

Who Uses This Calculator?

💻
IT Managers

Justify availability investments.

📊
Business Leaders

Understand downtime financial risk.

🔧
SREs

Prioritize reliability improvements.

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DevOps

Make case for redundancy investment.

Common Mistakes to Avoid

❌ Revenue loss is just direct cost

Add indirect costs: customer churn, reputation, SLA penalties, recovery labor, regulatory fines. True cost is typically 3-10× direct loss.

❌ 24/7 businesses use 8760 hours

For always-on services (ecommerce, SaaS), use 8,760 hours/year. For B2B business hours use 2,080.

Frequently Asked Questions

Gartner downtime cost estimate?

Gartner estimates average IT downtime cost at $5,600/minute ($336,000/hour). Varies hugely by business type and time of outage.

High-value downtime windows?

Black Friday, product launches, end-of-month/quarter. Schedule maintenance outside peak revenue windows.

Downtime cost by industry?

Financial services: $1M+/hour. Ecommerce: $100K+/hour. Healthcare: $636K/hour average (Ponemon study).