Compare repair and replacement with the assumptions in plain sight
Decision tools and practical guides for comparing repair cost, replacement cost, remaining life, repeat failures, downtime, efficiency savings, warranty exposure and total value.
Useful structure, not false certainty.
The familiar “repair if it is cheap” shortcut can fail when reliability, support, downtime, efficiency, warranty and remaining useful life point in different directions.
Start with a calculator
Use assumptions that match your own operation, project or item.
Repair Cost Percentage Calculator
Compare a repair quote with the price of a suitable replacement as a simple first-pass ratio.
Annualized Replacement Cost Calculator
Spread a replacement purchase price over an expected useful-life assumption for comparison purposes.
Repair Cost per Added Year Calculator
Compare a repair cost with the number of additional useful years you reasonably expect it to provide.
Break-Even Added Life Calculator
Estimate how many added years a repair would need to match the annualized purchase cost of a replacement.
Downtime Cost Scenario Calculator
Estimate an operational downtime cost from hours unavailable and a user-supplied cost per hour.
Repair History Cost Calculator
Summarize recent repair spending and calculate an annualized rate over the period you choose.
Define
Set scope and units.
Estimate
Use visible assumptions.
Compare
Compare equivalent options.
Review
Learn from actual results.
Go beyond the tool
Repair or Replace Framework
Use safety, cost, remaining life, reliability and support as separate decision inputs.
Why the 50% Rule Is Not a Rule
Understand why “repair if under half the replacement price” can be a useful prompt but a poor universal decision policy.
Estimating Remaining Useful Life
Use condition, service history and support availability without pretending lifespan is predictable.
Repeat Failures and Sunk Cost
Separate money already spent from the cost and risk of the next choice.
Parts and Support Availability
Include parts availability, software support and service access in replacement timing.
Downtime in Repair Decisions
Make business downtime visible when waiting for repair or replacement materially affects operations.
Safety, legal and professional boundaries
This site does not diagnose faults or provide repair instructions. Stop using items that may be unsafe, recalled, electrically hazardous, fire-damaged, structurally compromised, leaking dangerous substances or otherwise safety-critical, and follow manufacturer, recall-authority and qualified service-professional guidance.
Read the full disclaimer →Why user-supplied inputs matter
A transparent assumption is usually more useful than a universal number that ignores location, equipment, contracts or operating conditions.