# rem to percentage

## A converter that calculates the percentage from a rem for given rem size and base size to make the measurement responsive

### Hot Keys

Calculate and copy the result of calculation.

Calculate the result.

Copy the result of calculation.

Reverse the converter to "Percentage to REM".

Focus the "REM" input.

Focus the "REM Size" input.

Focus the "Base Size" input.

### FAQ

#### How to convert REM to Percentage?

To convert rem to percentage, you should know total size of 1 REM, default is 16px, and size of base Then, just apply formula: ((rem * rem size) / base) * 100 For example, with 16px size of 1rem and 1000px of base, 1rem will be converted to: ((1 * 16) / 1000) * 100 = 1.6%

#### What is the REM to Percentage formula?

((rem * rem size) / base) * 100

#### What is rem unit?

REM is defined relative to the font size of the root element. The root element is matched by the :root pseudo-class or the html selector. 1 REM therefore takes on the value which is given to the font-size of the root element. This means that 1 REM keeps the same value throughout your whole CSS code.

#### What is % unit? (Percentage)

Percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign (%). A percentage is a dimensionless number, primarily used for expressing proportions, but percent is nonetheless a unit of measurement in its orthography and usage. In CSS, it is often used to define a size as relative to an element's parent element. For example, if parent element's size is 1000px, then 1% will be equal to 10px, 1% = 10px.

### REM to Percentage Conversion Table if rem size is 16px and base size is 1000px

rem | percentage |
---|---|

1rem | 1.6% |

2rem | 3.2% |

3rem | 4.8% |

4rem | 6.4% |

5rem | 8% |

6rem | 9.6% |

7rem | 11.2% |

8rem | 12.8% |

9rem | 14.4% |

10rem | 16% |

11rem | 17.6% |

12rem | 19.2% |

13rem | 20.8% |

14rem | 22.4% |

15rem | 24% |

16rem | 25.6% |

17rem | 27.2% |

18rem | 28.8% |

19rem | 30.4% |

20rem | 32% |

21rem | 33.6% |

22rem | 35.2% |

23rem | 36.8% |

24rem | 38.4% |

25rem | 40% |