Percent Error Calculator

Measure Experimental Accuracy with Precision

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Basic Percent Error Calculator

Calculate the percent error between experimental and theoretical values.

Percent Error: - %

Absolute Error Calculator

Calculate the absolute difference between experimental and theoretical values.

Absolute Error: -

Relative Error Calculator

Calculate the relative error as a decimal value.

Relative Error: -

Understanding Percent Error

What is Percent Error?

Percent error is a measure of accuracy that expresses the difference between an experimental and theoretical value as a percentage. The formula is:

% Error = |Experimental - Theoretical| / Theoretical × 100%

Types of Error

Common types of error in measurements:

  • Systematic Error
  • Random Error
  • Absolute Error
  • Relative Error

Applications

Percent error is used in:

  • Laboratory measurements
  • Quality control
  • Instrument calibration
  • Research validation

Error Analysis

Important considerations:

  • Precision vs. Accuracy
  • Significant figures
  • Error propagation
  • Measurement uncertainty