↩MATH
Reverse Percentage Calculator
Find the original value when you know a final amount and the percentage it represents.
Enter your values
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Privacy-friendly: your inputs are processed locally in your browser.
Formula
Original value = known value ÷ (percentage ÷ 100)
Original value = known value ÷ (percentage ÷ 100)
How it works
1
Enter the values requested.
2
Press Calculate to perform the arithmetic.
3
Review the result and supporting values.
Important notes
This tool is a focused calculation aid. Use the result as an estimate where real-world conditions can affect the final answer.