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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 operating hours

Total time the asset was scheduled to be running — usually your planned hours over the period.

hrs

Number of failures / breakdowns

Every unplanned stop that required a repair during the period.

events

Total downtime (unplanned)

Sum of hours the asset was down across all failure events.

hrs

Target availability98.0%

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.

Stop calculating. Start measuring.

AssetOS tracks MTTR, MTBF, and availability automatically across every asset — so your next board meeting shows live numbers, not spreadsheet guesses.

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