Science

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Percentages, Fractions, and Decimal Values

# How do you calculate total percentage error?

###### Wiki User

###### August 22, 2015 3:32PM

It is 100*(Calculated Value - True Value)/True Value

## Related Questions

###### Asked in Chemistry, Statistics

### How do you calculate percentage error for equipment?

Look on the equipment for where it says the plus or minus figure
for accuracy (for a burette it is usually + and _ 0.1cm3) divide
this by the amount you measured , times 100 to make it a
percentage. ---- ---- Percentage Error = Maximum Error /
Measured Value X 100 For example.
Maximum Error for the following apparatus are:
Balance = +/- 0.01
Pippette = +/- 0.1 And the Measured value for each
are:
Balance = 0.15
Pippette = 25 Then...the percentage error is:
Balance percentage error = 0.01 / 0.15 X 100 = 66.66%
Pippette percentage error = 0.1 / 25 X 100 = 0.3% You can
now also work out your maximum total error.
Maximum total Percentage error = Balance Percentage error +
Pippette Percentage error
Maximum total percentage error = 66.66 + 0.4 = 67.06%

###### Asked in Science

### Calculate percentage recovery?

###### Asked in Percentages, Fractions, and Decimal Values

### What is the percent error of 4cm?

A percent error depends on the size of the measurement as well
as the error itself. It's very intuitive to think about: If you're
measuring a piece of paper and you're off by 4 cm, you'll have
problems; if you're measuring the moon, that's nothing. A bigger
percent error is a bigger deal to an engineer. You can calculate it
the same way as any percentage: Divide the error by the total
length of the measurement, then multiply by 100 to convert it from
a proportion to a percentage.