Lux to Foot-candles Converter
Quick answer: To convert lux to foot-candles, multiply by 0.09290304. For example, 10 lx is 0.9290304 fc. One lux equals 0.09290304 fc.
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Use the Lux to Foot-candles Converter
Lux to Foot-candles formula and what each symbol means
fc = lx × 0.09290304
| Symbol | Meaning |
|---|---|
| lx | Lux |
| fc | Foot-candle |
Lux to Foot-candles examples
1 lx
1 lx × 0.09290304 = 0.09290304 fc.
10 lx
10 lx × 0.09290304 = 0.9290304 fc.
100 lx
100 lx × 0.09290304 = 9.290304 fc.
Lux compared with Foot-candles
One fc is 10.76 times as large as one lx, so your number gets smaller when you convert lux to foot-candles and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About lux and foot-candles
Lux (lx): The lux, one lumen per square metre. Foot-candle (fc): The foot-candle, one lumen per square foot, about 10.764 lx.
How to calculate Lux to Foot-candles step by step
- Enter the value in lx (the starting unit).
- Multiply by 0.09290304, because 1 lx = 0.09290304 fc.
- The product is the value in fc. To go back, divide by 0.09290304 or multiply by 10.76391.
Popular illuminance conversions
How to read your Lux to Foot-candles result
Quick estimate: multiply by about 0.093 to get foot-candles from lux; this is within 0.2% of the exact factor. The SI unit is the lux, one lumen per square metre.
| LUX | FOOT-CANDLES |
|---|---|
| 1 | 0.09290304 |
| 2 | 0.1858061 |
| 5 | 0.4645152 |
| 10 | 0.9290304 |
| 20 | 1.858061 |
| 50 | 4.645152 |
| 100 | 9.290304 |
| 1,000 | 92.90304 |
Foot-candles to Lux: quick table
| FOOT-CANDLES | LUX |
|---|---|
| 1 | 10.76391 |
| 5 | 53.81955 |
| 10 | 107.6391 |
| 25 | 269.0978 |
| 50 | 538.1955 |
| 100 | 1,076.391 |
| 250 | 2,690.978 |
| 500 | 5,381.955 |
Common mistakes when calculating Lux to Foot-candles
- Mixing lux and foot-candles: 1 fc is about 10.76 lx.
- Dividing when you should multiply: from lx to fc multiply by 0.09290304; from fc to lx divide by 0.09290304.
Lux to Foot-candles FAQ
How many fc are in 1 lx?
1 lx equals 0.09290304 fc.
How many lx are in 1 fc?
1 fc equals 10.76391 lx.
Is 1 lx = 0.09290304 fc an exact conversion?
The factor is shown rounded to 7 significant figures (0.09290304). The calculator above uses more digits.
What is a lux (lx)?
The lux, one lumen per square metre.
How can I estimate lux to foot-candles in my head?
Quick estimate: multiply by about 0.093 to get foot-candles from lux; this is within 0.2% of the exact factor.
What is 40 lx in foot-candles?
40 lx = 3.716122 fc (since 40 × 0.09290304).
What is 200 lx in foot-candles?
200 lx = 18.58061 fc (since 200 × 0.09290304).
What is 3 lx in foot-candles?
3 lx = 0.2787091 fc (since 3 × 0.09290304).
How many decimals should I keep when converting lx to fc?
Match the precision of your original measurement. For example, 0.9290304 fc rounds to 0.929 fc at 3 significant figures; keep more digits only for engineering or scientific work.
More in Illuminance converters
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the International System of Units (SI)