FreeByte

Repair or replace calculator

Is the old car still worth keeping?

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18
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$
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Repair it

$346.67/mo difference

Repair cost per month

$133.33

With these inputs, repair it comes to $346.67/mo difference over 18 months. Repair cost per month works out to $133.33.

Repair vs value
46%
Replacement cost over the same period
$8,640

Over time · by months the repair buys

What moves the number · Repair it

Input−10%Now+10%
Repair cost$360/mo difference$346.67/mo difference$333.33/mo difference
Payment on a replacement$298.67/mo difference$346.67/mo difference$394.67/mo difference
Months the repair buys$331.85/mo difference$346.67/mo difference$358.79/mo difference

Solve for an input

Whatmakesequal

Compare scenarios

Save this set of inputs, change something, then save again to compare the outcomes side by side.

Is the old car still worth keeping?

A worked example

Starting figures

Repair cost
$2,400
Car value
$5,200
Payment on a replacement
$480
Months the repair buys
18

What it returns

Repair it
$346.67/mo difference
Repair cost per month
$133.33
Repair vs value
46%
Replacement cost over the same period
$8,640

How to read the results

With the defaults above, repair it works out at $346.67/mo difference.

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