In this article I will show you how to convert 691 lux into foot-candles. Throughout the explanation below I might also call it 691 lx to ft-cd. They are the same thing!

## How to Convert Lux to Foot-candles

A lux is smaller than a foot-candle. I know that a lx is smaller than a ft-cd because of something called conversion factors.

Put very simply, a conversion factor is a number that can be used to change one set of units to another, by multiplying or dividing it. So when we need to convert 691 lux into foot-candles, we use a conversion factor to get the answer.

The conversion factor for lx to ft-cd is:

Now that we know what the conversion factor is, we can easily calculate the conversion of 691 lx to ft-cd by multiplying `0.092903129906447`

by the number of lux we have, which is 691.

**So, the answer to the question "what is 691 lux in foot-candles?" is 64.196062765355 ft-cd.**

## Lux to Foot-candles Conversion Table

Below is a sample conversion table for lx to ft-cd:

Lux (lx) | Foot-candles (ft-cd) |
---|---|

0.01 | 0 |

0.1 | 0.01 |

1 | 0.09 |

2 | 0.19 |

3 | 0.28 |

5 | 0.46 |

10 | 0.93 |

20 | 1.86 |

50 | 4.65 |

100 | 9.29 |

1000 | 92.9 |

## Best Conversion Unit for 691 lx

Sometimes when you work with conversions from one unit to another, the numbers can get a little confusing. Especially when dealing with really large numbers.

I've also calculated what the best unit of measurement is for 691 lx.

To determine which unit is best, I decided to define that as being the unit of measurement which is as low as possible, without going below 1. Smaller numbers are more easily understood and can make it easier for you to understand the measurement.

**The best unit of measurement I have found for 691 lx is foot-candles and the amount is 64.196062765355 ft-cd.**