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# Rounding values in Pandas

schedule Aug 12, 2023
Last updated
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PythonPandas
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To round values in Pandas use the DataFrame.round(~) method. The method takes a single parameter which specifies the number of decimals to round to.

# Examples

Consider the following DataFrame:

import pandas as pd
df = pd.DataFrame({"A":[1.05,2.42],"B":[3.45,4.9]})
df
A B
0 1.05 3.45
1 2.42 4.90

## Single column

To round only column "A" to the nearest integer:

df.round({"A":0})
A B
0 1.0 3.45
1 2.0 4.90

To round column "B" to the nearest tenth, supply 1 as the argument:

df.round({"B":1})
A B
0 1.05 3.4
1 2.42 4.9
WARNING

Numbers ending in 5 will be rounded down. Here we see 3.45 in column "B" was rounded down to 3.4 instead of rounding up.

## Entire DataFrame

Consider the following DataFrame:

import pandas as pd
df = pd.DataFrame({"A":[1.05,2.42],"B":[3.45,4.9]})
df
A B
0 1.05 3.45
1 2.42 4.90

To round the entire DataFrame to the nearest integer:

df.round()
A B
0 1.0 3.0
1 2.0 5.0
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