Reliability Engineering Workspace

Know your MTBF, MTTR, and availability in seconds

Free calculators, the 7 basic quality tools, and engineering converters — running entirely in your browser. No signup, no spreadsheets.

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calculators: 16; calculators
quality tools: 7; quality tools
converters: 3; converters
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Try it: Availability

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MTBF (hours)MTTR (hours)

Availability

99.206%

Expected downtime

2.9 days/year

Open the full availability calculator

Browse by Category

Start from a category page and jump straight to the tool you need.

16 tools

Calculators

MTTR, MTBF, availability, OEE, Weibull, FMEA, and more — every reliability and statistics calculator in one place.

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7 tools

Quality Tools

The 7 basic quality tools — Pareto, fishbone, histogram, control chart, and more — fully interactive.

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3 tools

Converters

Fast engineering unit conversions for MTBF, FIT, failure rate, PPM, DPMO, and time units.

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Popular Tools

The calculators engineers reach for most.

MTTR Calculator

Mean time to repair

MTBF Calculator

Mean time between failures

OEE Calculator

Overall equipment effectiveness

Weibull Analysis

Failure distribution fitting

Process Capability

Cp / Cpk analysis

Downtime Cost

Financial impact of outages

Learn the Methods

The formulas, worked examples, and field cases behind every calculator.

Formulas

Reference equations used by the calculators.

Examples

Practical scenarios and worked outputs.

Guides

Step-by-step reliability workflows.

Case Studies

Real-world reliability applications.