Compare a value with the same period one year earlier.
Please do not make financial decisions based on these results.
What is the Year Over Year Growth Calculator?
Compare a value with the same period one year earlier. To use the Year Over Year Growth Calculator, enter current period, same period last year; it returns yoy growth, change, and shows them instantly as you type.
Where the Year Over Year Growth Calculator fits
Compare a value with the same period one year earlier. The main figure it returns is the YoY growth, worked out from the values you enter.
It belongs with the other investment tools. If you are comparing options or checking a result from another angle, try the Week Over Week Calculator, CAGR Calculator (Compound Annual Growth Rate) or the Compound Growth Calculator.
How to use the Year Over Year Growth Calculator
- Enter your numbers. The inputs are Current period ($), Same period last year ($). Use a rate of return you consider realistic; small changes compound into large differences. Fields marked optional can stay at zero.
- Read the result. The highlighted box gives the YoY growth, and the cards below show Change. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the Year Over Year Growth Calculator using the default values shown in the calculator above:
Inputs
| Current period ($) | 1,350,000 |
|---|---|
| Same period last year ($) | 1,200,000 |
Results
| YoY growth | 12.5% |
|---|---|
| Change | $150,000.00 |
With these inputs the calculator returns YoY growth: 12.5%. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Current period ($) from 1,350,000 to 1,620,000 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| YoY growth | 12.5% | 35% | +180% |
| Change | $150,000.00 | $420,000.00 | +180% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the Year Over Year Growth Calculator reports YoY growth and change. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. Investment returns are not guaranteed. The result shows what the numbers you enter would produce, not what the market will do. It is for information, not financial, tax or legal advice.
Frequently asked questions
Why compare year over year?
It removes seasonality, which month-to-month comparisons can’t.
What rate of return should I assume?
There is no guaranteed rate. Test a range of conservative and optimistic rates, and remember that fees and inflation reduce your real return.
Are investment returns guaranteed?
No. Real returns vary. Use these tools to compare scenarios, not to predict results.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
Related investment calculators
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- Expected Utility Calculator
- Opportunity Cost Calculator
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