Loss Percentage Calculator: Easily Determine Financial Setbacks
Use the calculator by entering your monetary loss and the original cost, then press “Calculate”. The tool divides loss by cost and multiplies by 100 to show loss percentage—e.g., a $750 loss on a $2,500 cost equals 30 %. Only 28 % of U.S. small firms track project losses monthly (NFIB, 2022).
Loss Percentage Calculator
Result
★ Add to Home Screen
×
Follow these steps:
Tap the Share button at the bottom of the browser
Scroll down and tap “Add to Home Screen”
Tap “Add” to confirm
Follow these steps:
Tap the menu icon (⋮) in the top right
Tap “Add to Home screen”
Tap “Add” to confirm
Follow these steps:
Click the menu icon (⋮) in the top right
Click “Bookmarks”
Click “Bookmark this tab” or press Ctrl+D (Cmd+D on Mac)
Is this tool helpful?
Thanks for your feedback!
How to use the tool
Total Loss: type the money you lost (e.g., $750 or $120).
Cost Price: enter the original outlay (e.g., $2,500 or $800).
Loss % normalizes performance across different project sizes (Investopedia, 2023).
Many firms set a 10 % loss ceiling before corrective action (PMI Pulse, 2021).
The IRS lets businesses deduct losses against income under Pub 535 (IRS, 2022).
Retail investors saw average 14 % portfolio drawdowns in 2022 (CFA Institute, 2023).
What is loss percentage?
Loss percentage expresses the proportion of money lost relative to initial cost, allowing apples-to-apples comparisons across deals (Investopedia, 2023).
How does the calculator compute it?
The script divides your loss by cost price and multiplies by 100; no rounding errors beyond two decimals.
Why must cost price stay positive?
A zero or negative denominator makes the ratio undefined; accounting rules treat cost as a non-negative base (FASB ASC 830, 2020).
Is the output precise?
The browser uses IEEE-754 double precision, accurate to 15-17 significant digits (IEEE, 2019).
Can I switch currencies?
Yes—results are currency-agnostic because the formula uses relative values, not absolute units.
How can this metric guide investments?
You compare loss percentages across assets to decide reallocations and set stop-loss triggers (SEC Investor.gov, 2022).
What is an acceptable loss benchmark?
Project managers flag losses above 10 % for review (PMI Pulse, 2021); equity funds often allow up to 20 % drawdown.
How often should I update inputs?
Update after every cash-flow event; 28 % of U.S. small businesses review losses monthly (NFIB, 2022).
Important Disclaimer
The calculations, results, and content provided by our tools are not guaranteed to be accurate, complete, or reliable. Users are responsible for verifying and interpreting the results. Our content and tools may contain errors, biases, or inconsistencies. We reserve the right to save inputs and outputs from our tools for the purposes of error debugging, bias identification, and performance improvement. External companies providing AI models used in our tools may also save and process data in accordance with their own policies. By using our tools, you consent to this data collection and processing. We reserve the right to limit the usage of our tools based on current usability factors. By using our tools, you acknowledge that you have read, understood, and agreed to this disclaimer. You accept the inherent risks and limitations associated with the use of our tools and services.
