Original Before Decrease Calculator - Find Original Amount Before Percentage Decrease
Help
Calculate the original value before a percentage decrease, given the new value and percentage decrease.
Practical Uses
- Budget (Pre-Cut):
What was the original renovation budget [Original] before a 25% [Decrease] cut made it $3,750 [New]?
$5,000 - Investment (Pre-Loss):
What was the original stock portfolio [Original] before a 12% [Decrease] loss made it worth $1,760 [New]?
$2,000 - Expense Before Cut:
What were the original subscription costs [Original] before a 7% [Decrease] cut made them $930 [New]?
$1,000 - Salary Before Cut:
What was the original freelance income [Original] before an 8% [Decrease] drop made it $46,000 [New]?
$50,000 - Pre-Decline Population:
What was the original population of Detroit [Original] before a 3% [Decrease] decline left it at 97,000 [New] people?
100,000 - Price Before Discount:
What was the original price [Original] before a 5% [Decrease] Target Circle discount made it $95 [New]?
$100
How to Use
- Type the percentage dropped in the first box.
- Enter the final (lower) number in the second box.
- We'll instantly calculate what the value was before the decrease.
- Use the "Round" checkbox for a cleaner 2-decimal result.
- Save it to Memos with Enter or the "Add to Memos" button.
How It Works
The Original Before Decrease calculator uses this formula:
For example, to find the original value when the new value is $950 after a 5% decrease, the calculator computes:
So the original value was $1,000.
Important Note
When the decrease percentage is 100%, the calculation is undefined because you cannot divide by zero. The calculator will show an error message in this case.
Need more percentage tools?
- Basic Percentage Calculator
For discounts or taxes. - Part-to-Whole Percentage
Find what % one number is of another. - Original Value Calculator
Reverse a percentage to the original amount. - Percentage Change Calculator
Work out increases or decreases. - Increased Value Calculator
Calculate value after percentage increase. - Decreased Value Calculator
Calculate value after percentage decrease. - Original Before Increase Calculator
Find original amount before percentage increase. - Specialized Calculators (63+)
Practical everyday calculations for real-life scenarios.
Requirements and Important Information
- No installation required – works directly in your browser.
- Compatible with all modern browsers (Chrome, Firefox, Safari, Edge).
- Calculations are performed locally – no data is sent to any server.
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Your calculation memos is stored only on your device.
Each calculator stores up to 20 most recent calculations, automatically removing the oldest entries when this limit is reached. - Works offline after the initial page load.
- Supports both desktop and mobile devices.
- No account or login required.
Helpful Calculator Features
- Real-time calculations that update as you type.
- Copy results to clipboard with a single click.
- Calculation memos that persists between sessions.
- Option to round results for cleaner numbers.
- Clear visual formulas to understand the math.
- Mobile-friendly interface that works on all devices.
- Dark mode support for comfortable viewing.
- Keyboard shortcuts for faster calculations.
Tips for Accurate Calculations
- Verify Inputs: A small typo can make a big difference.
- Use Decimals: For precision, always use decimal points (e.g., 10.5).
- Instant Updates: Results appear immediately—no waiting.
- Rounding: Check "Round" to tidy up your results to 2 decimal places.