The percent error calculator allows you to find the error percentage between observed or experimental and true values.
The following formula is used:
Percent Error = |Observed - True| ÷ True × 100
The true weight of a package is 15 kg, but the observed weight is 14.6 kg. Find the percent error.
Apply the values in the formula:
= |14.6 - 15| ÷ 15 × 100
= |-0.4| ÷ 15 × 100
= 0.0266 × 100
= 2.67%
The true length of a steel rod is 232 cm, while the observed length is 250 cm.
= |250 - 232| ÷ 232 × 100
= |18| ÷ 232 × 100
= 0.07758 × 100
= 7.76%