How this calculator helps
When a listing updates, you want to know both the dollar change and the relative change. This calculator is ideal for marketplace watchers and deal hunters.
Formuladrop = old − new, percent drop = (drop ÷ old) × 100
How to read the results
If the new price is higher than the old price, the tool will show a negative drop (an increase). Compare that with alerts from your tracker to validate big swings.