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MTTR & MTBF Calculator

Enter your downtime events and operating hours. We'll calculate your Mean Time To Repair, Mean Time Between Failures, and uptime availability — instantly, in the browser. Nothing leaves your device.

Your data

Total time the asset was scheduled to be running — usually your planned hours over the period.
hrs
Every unplanned stop that required a repair during the period.
events
Sum of hours the asset was down across all failure events.
hrs
98.0%
World-class manufacturing benchmark is 90% OEE availability. Medical and aviation track higher.
All math runs locally in your browser. Your numbers never leave this page — we don't log them, we don't need to.

Your results

Live
Availability
98.72%
Based on 8,760 planned hours, 24 failures, and 112.0 hours of downtime.
MTTR
4.67hrs
Mean time to repair per event
MTBF
360.3hrs
Mean time between failures
Uptime
8,648hrs
Hours the asset was running
Failure rate
2.74/kh
Failures per 1,000 hours
vs. your target
On target
80%target 98.0%100%
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MTTR

Mean Time To Repair

The average time it takes to diagnose and fix an asset after it goes down. Lower is better — it tells you how fast your team responds.

MTTR = Downtime ÷ Failures
MTBF

Mean Time Between Failures

Average operating hours between breakdowns. Higher is better — it tells you how reliable your asset is over time.

MTBF = Uptime ÷ Failures
Availability

Asset availability %

Share of planned time the asset was actually running. Headline reliability number for every maintenance manager.

A = Uptime ÷ Planned hrs × 100

How does your MTTR compare?

Industry averages vary widely by asset type. Use these benchmarks to understand where your team stands.

Manufacturing
Industry avg: 4–6 hrs
World-class: < 2 hrs
Facilities / HVAC
Industry avg: 2–4 hrs
World-class: < 1.5 hrs
Fleet / Transport
Industry avg: 3–8 hrs
World-class: < 2 hrs
Medical equipment
Industry avg: 1–3 hrs
World-class: < 45 min
👍
Your MTTR: 4.67 hrs
Solid performance, around the industry average for most sectors.
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MTTR & MTBF · FAQ

What is a good MTTR benchmark?+

MTTR benchmarks vary by industry and asset type. Manufacturing typically targets under 4 hours; facilities maintenance often runs 8–24 hours. What matters more than the absolute number is trend — is your MTTR improving month over month?

What is the difference between MTTR and MTBF?+

MTTR (Mean Time To Repair) measures how long it takes to fix a failure. MTBF (Mean Time Between Failures) measures how long equipment runs between failures. Together they determine your overall availability: Availability = MTBF ÷ (MTBF + MTTR).

How can I reduce my MTTR?+

Three proven levers: pre-staged spare parts kits for common failure modes, documented step-by-step repair procedures attached to the work order, and mobile access so technicians can pull asset history on the floor without walking back to the office.

Does MTTR apply to all equipment types?+

Yes — MTTR and MTBF apply to any repairable asset: HVAC units, production machinery, vehicles, electrical panels, lifts, or network infrastructure. The formula is the same; the benchmarks differ by asset class.