1. What is Measurement Uncertainty?

Measurement uncertainty quantifies the doubt about the measurement result. It represents the range within which the true value is believed to lie with a given confidence level.

2. How Uncertainty is Calculated

The calculator uses the range method formula:

Where:

• Max Value — The highest measurement in the range
• Min Value — The lowest measurement in the range

Explanation: This simple method estimates uncertainty from the spread of repeated measurements. The uncertainty represents half the range of observed values.

3. Importance of Uncertainty Calculation

Details: Understanding measurement uncertainty is essential for quality control, scientific reporting, and making informed decisions based on measurements. It helps determine if differences between measurements are significant or within expected variation.

4. Using the Calculator

Tips: Enter the maximum and minimum values from your measurement series. The calculator will determine the uncertainty. Both values must be valid (Max > Min).

5. Frequently Asked Questions (FAQ)

Q1: What units does this calculator use?
A: The calculator works with any consistent units (mm, g, V, etc.). The result will be in the same units as your input values.

Q2: When should I use this method?
A: This range method is best for quick estimates with small numbers of repeated measurements (typically 3-10 observations).

Q3: What's the difference between uncertainty and error?
A: Error is the difference between measured and true values, while uncertainty quantifies the doubt about the measurement result.

Q4: Are there more precise methods?
A: For more rigorous analysis, use standard deviation methods or consider all uncertainty components (Type A and B evaluations).

Q5: How should I report uncertainty?
A: Typically report as: Measurement ± Uncertainty (units), with a coverage factor (often k=2 for 95% confidence).