A repair shop quotes you a number, and the whole decision lands on you in the same breath: is this machine worth fixing, or are you throwing good money after a dying laptop? Most people answer it on a feeling. The feeling is usually wrong, because it is driven by whichever number is scarier that day, the repair bill or the price of something new. The honest way to decide is a little arithmetic that takes the panic out of it. This repair-or-replace calculator runs that math for you, and the rest of this page explains every step so you can trust the answer instead of just taking it.
This is a guide, not a verdict carved in stone. It weighs the repair against how much useful life is left in the machine, using the shop rule that a fix costing more than half a replacement usually is not worth it. Data you cannot lose or software you depend on can tip a close call toward repair regardless of the number.
The tool gives you an answer in seconds. Understanding why it lands where it does is what lets you overrule it when your situation calls for it.
The 50 percent rule, and where it comes from
Repair shops have carried a rough rule for decades: if the fix costs more than half of what a replacement would, lean toward replacing. It survives because it quietly folds in something people forget in the moment. A repair only patches the one part that failed, while the rest of an aging machine keeps marching toward its own failures. Spend three hundred dollars fixing a screen on a laptop worth six hundred, and you have a repaired screen bolted to a four-year-old battery, a four-year-old drive, and a four-year-old everything else. The half-price line is a blunt way of saying that at some point you are pouring money into a body that is running out of road.
Why age changes everything
The same repair quote is a good deal on a one-year-old machine and a bad one on a six-year-old machine, and the price alone will never tell you which you are holding. A laptop tends to have five to seven useful years in it, a desktop six to eight, before the combination of a tired battery, a slowing drive, and software that has outgrown the hardware makes it more trouble than it is worth. What matters is not how old the machine is but how much life is left, which is why the calculator asks for both the age and the expected lifespan and works out the gap. A fix that buys you three more years is a very different purchase from the identical fix that buys you six months.
The number that actually decides it: cost per year
Here is the honest way to compare two prices that buy different things. A repair costs you its quote in exchange for the years left in the machine. A replacement costs you its price in exchange for a full lifespan. Divide each cost by the years it buys and you get a cost per year for both, and now they are finally comparable. If repairing works out cheaper per year than buying new, the repair is earning its keep and the calculator says so outright. If it costs more per year, you are paying extra for fewer years, and the tool holds back at Borderline: replace if you want the runway, repair only if cash is tight this month. This is the calculation most people do by gut and get backwards, because a big new-purchase price frightens them out of the choice that was cheaper all along, or a low repair quote lures them into feeding a machine that is nearly done.
When to repair even if the math says replace
Numbers do not know your life. Fix the machine anyway when it holds data you have not backed up and the repair is the safest route to getting it off, when it runs one piece of software your work depends on that a new machine would fight you over, or when replacing it means a week of setup you genuinely cannot spare right now. A borderline verdict is an invitation to weigh those things, not a command. The point of the calculator is to tell you the size of what you are trading away, so that if you choose to repair a machine that the math would replace, you do it on purpose and not by panic.
When to replace even if the repair is cheap
The trap runs the other way too. A cheap quote on a very old machine is often the most expensive choice you can make, because the failure you can see is rarely the last one coming. If a six-year-old laptop needs a new drive and the fan is already whining and the battery holds twenty minutes, the drive is not the problem, the age is. Before you pay to fix an old machine, it is worth ruling out the cheaper causes of the symptoms first: many slowdowns that feel terminal are fixable for nothing, which is the whole point of the guide on how to fix a slow computer. If the machine still fails after the free fixes, then the repair quote is real, and the calculator above tells you whether to pay it.
Work the cheap checks first
Half the machines people are ready to give up on never needed a shop at all. A laptop that will not power up might be a cable or a port rather than a dead board, which the walkthrough on a laptop that will not charge sorts out from the wall inward. A stop-code crash reads like the end but usually points at one fixable cause, covered in the guide to the blue screen of death. Rule those out, and any repair quote you are left with is honest. Then the decision is simple arithmetic, and you already have the tool for it at the top of this page.