If you want to know how to calculate percent error easily, you should watch this video. Error is the amount of deviation from accurate values. Error calculation is not possible, unless you make a quantitative measurement of the various quantities involved in your experiment. Measurement can help us in calculating errors and knowing how right we are in our theoretical models. In calculating percent error, We need to get the experimental value and the value which you are aiming at, which is the actual value first. Subtract the experimental value from the actual value and take its absolute value. Divide the raw error by the actual value and multiply the relative error by 100 to get the percent error. You're done.
 Hot
 Latest

How To: Remember "greater than" & "less than" symbols

How To: Find extra points for a parabola (quadractic equation)

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the lowest common multiple/LCM with a factor tree

How To: Calculate Faster Than a Calculator

How To: Find a number given Its percent

How To: Find the Percent Given Two Numbers

How To: Find and sketch the domain of a multivariable function

How To: Write a logarithm as a sum or difference of logarithms

How To: Find the 100th term in a sequence

How To: Convert fractions to decimals quickly and easily

How To: Quickly find the area of a trapezoid

How To: Find the opposite and absolute value of a number

How To: Draw a perpendicular line from a point on a line

How To: Do long division without a calculator

How To: Divide small numbers by big numbers

How To: Find the area of a parallelogram using geometry

How To: Convert Fahrenheit to Celsius with a formula

How To: Find a missing coordinate given: coordinate & equation

How To: Do normal probability calculations on a calculator

How To: Remember "greater than" & "less than" symbols

How To: Find extra points for a parabola (quadractic equation)

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the lowest common multiple/LCM with a factor tree

How To: Calculate Faster Than a Calculator

How To: Find a number given Its percent

How To: Find the Percent Given Two Numbers

How To: Find and sketch the domain of a multivariable function

How To: Write a logarithm as a sum or difference of logarithms

How To: Find the 100th term in a sequence

How To: Convert fractions to decimals quickly and easily

How To: Quickly find the area of a trapezoid

How To: Find the opposite and absolute value of a number

How To: Draw a perpendicular line from a point on a line

How To: Do long division without a calculator

How To: Divide small numbers by big numbers

How To: Find the area of a parallelogram using geometry

How To: Convert Fahrenheit to Celsius with a formula

How To: Find a missing coordinate given: coordinate & equation

How To: Do normal probability calculations on a calculator
1 Comment
I do not believe this to be accurate; it is a very common mistake. To begin with, error is calculated as: experimental value  actual value. The formula is set up so larger values are positive and lesser values are negative. Then divide the absolute value of the error by the absolute value of the actual value and multiply be 100 to get the percent. To demonstrate the importance of using the absolute value of the denominator, take the case of an actual value of 4 and an experimental value of 3. Plugging into your formula would give a percent error of 25% when in reality it is 25%.
Share Your Thoughts