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Error Percentage Calculator

This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to give the percentage error from an estimated number value to another that is the actual and concise value. By definition, percentage is a fraction or ratio expressed as part of 100. Error percentage is that action over time, long term, brief or momentary. Error percentage from one number to another number, is determined by dividing the difference of the two numbers by the concise number. Obviously, there are two types of error condition suggestions, increase and decrease; knowing which direction your tendency is could be quite helpful. In your estimation, do you error in excess (overestimate) or tend to be conservative (underestimate)? We present a message telling you that you need to increase or decrease your estimate or estimates.

To determine error percentage, divide the error difference by the concise number. An error in an estimate from 25 to 75 actual is calculated in this manner. The difference is 50. 50/75 = .66667 and you need to increase your estimate. That figure times 100 = 66.667%, or an increase of 66.667%.

Required Data Entry
Estimated Value
Concise Value

Calculated Results
Error Difference
Error Percentage
Version 1.3.6

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