Calculate EPR points, tasks, weightage, annual rate, or years from the other four values using Tasks × Weightage × annual growth rate.
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EPR Points Formula
The EPR Points Calculator uses a compound growth formula. You enter any four values, and the calculator solves for the missing value.
To solve for total tasks:
To solve for task weightage:
To solve for annual rate of increase:
To solve for years:
- EPR = total EPR points
- T = total number of tasks completed
- W = weightage of each task
- r = rate of increase per year, as a percent
- Y = total number of years
The calculator can find total EPR points when tasks, weightage, rate, and years are known. It can also rearrange the same formula to find the missing number of tasks, task weightage, annual rate, or years. The rate field uses percent form, so enter 5 for 5%, not 0.05.
EPR Growth Factor Reference
The growth factor is the multiplier applied to the starting task points after compounding for the selected number of years.
| Annual rate | 1 year | 3 years | 5 years | 10 years |
|---|---|---|---|---|
| 0% | 1.0000 | 1.0000 | 1.0000 | 1.0000 |
| 2% | 1.0200 | 1.0612 | 1.1041 | 1.2190 |
| 5% | 1.0500 | 1.1576 | 1.2763 | 1.6289 |
| 10% | 1.1000 | 1.3310 | 1.6105 | 2.5937 |
Input Rules and Common Limits
| Field being calculated | Important condition | Reason |
|---|---|---|
| Tasks | Weightage cannot be 0 | The formula divides by weightage. |
| Weightage | Tasks cannot be 0 | The formula divides by tasks. |
| Rate | Years cannot be 0 | A yearly rate cannot be derived from zero years. |
| Years | Rate cannot be 0 | The logarithm denominator would be zero. |
| Any growth calculation | Rate must be greater than -100% | The growth base must stay positive. |
Example EPR Points Calculations
Example 1: Calculate total EPR points
Suppose you completed 120 tasks, each task has a weightage of 2.5, the annual increase is 5%, and the period is 3 years.
The total EPR points are 347.2875.
Example 2: Calculate the required annual rate
Suppose the total EPR points are 500, tasks are 200, weightage is 2, and the time period is 4 years.
The required annual rate of increase is 5.7371%.
EPR Points Calculator FAQ
What does the rate of increase mean?
The rate of increase is the yearly percentage growth applied to the base task points. The base task points are calculated as tasks multiplied by weightage. For example, a 5% rate for 3 years multiplies the base points by 1.05 raised to the power of 3.
Why do I need to enter exactly four values?
The formula has five variables: tasks, weightage, rate, years, and EPR points. To solve one unknown, the other four values must be known. If more than one value is blank, there is not enough information to get one specific answer.
Can the annual rate be negative?
Yes, the rate can be negative if the EPR points decrease over time. However, the rate must be greater than -100% because the growth base, 1 + rate/100, must remain positive for the calculator to use the formula correctly.
