Compare a later value with its starting value to measure proportional change.
Week Over Week Calculator
Results
Week over week % change
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Table of Contents
1
What is Week Over Week?
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How to Use This Calculator
- Enter or select Value in initial week, Value in following week.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
Change (%) = (final − initial) ÷ initial × 100
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Variables Explained
| Input | What it means |
|---|---|
| Value in initial week | The numeric input for the relationship being evaluated. |
| Value in following week | The numeric input for the relationship being evaluated. |
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Worked Example
Moving from 200 to 230 gives a 15% increase.
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Why Use This Calculator?
Compare consecutive weekly results when the measurement and reporting periods match.
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Common Mistakes
- Negative or zero starting values need care; the usual growth interpretation assumes a positive baseline.
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Frequently Asked Questions
Should I round numbers before calculating?
Keep the original input precision through the calculation and round the final answer to the precision you need. Rounding an intermediate result can change later steps.
Why can a manual calculation differ slightly?
Check the operation, units, signs and rounding first. Equivalent fractions or expressions can look different while representing the same value.
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Sources & References
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