PercentError

Calculate percent error from observed and actual values, fast and accurate.

PercentError quickly finds the percent error for any experiment or measurement. Enter your actual and observed values, tap CALCULATE, and you get the percent error instantly. The app ensures input is valid and actual is not zero.
Copy/share result for lab work, homework, or professional assessments, all displayed in a modern result card UI with clear feedback and friendly prompts.
Features:
Input actual and observed, get % error
Quick copy/share/reset
Validates inputs for actual ≠ 0
Helpful, clear interface for all users
Check scientific and real-world error reliably with PercentError!