Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Foot-candles to Nox
Convert fc to nx instantly, then review the formula, assumptions, and rounding guidance.
Light & sound unitsInstant result
Decimals
Formula result = input × 10.7639104167 ÷ 0.001. 1 fc = 10,763.9104 nx
Common examples
One value, several units
Lux10.7639 lx
Phot0.0011 ph
Nox10,763.9104 nx
Conversion table
| fc | nx |
|---|---|
| 1 fc | 10,763.9104 nx |
| 2 fc | 21,527.8208 nx |
| 5 fc | 53,819.5521 nx |
| 10 fc | 107,639.1042 nx |
| 25 fc | 269,097.7604 nx |
| 50 fc | 538,195.5208 nx |
| 100 fc | 1,076,391.0417 nx |
Conversion chart
1 fc10,763.9104 nx
5 fc53,819.5521 nx
10 fc107,639.1042 nx
25 fc269,097.7604 nx
50 fc538,195.5208 nx
Worked example
1 foot-candle equals approximately 10.7639 lux.
Unit definition
Foot-candles (fc) One foot-candles equals 10.7639104167 lux.
Unit history
Foot-candles is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert fc to lux.
3. Convert the base value to nx and apply your display precision.
Understand the result before using it
Foot-candles to Nox converts a value measured in Foot-candles (fc) into the equivalent value in Nox (nx). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 10.7639104167 ÷ 0.001
Assumptions
- Foot-candles and Nox represent the same illuminance quantity.
- The input is expressed in fc; the output is expressed in nx.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 fc = 10,763.9104167 nx. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a fc measurement in a document that expects nx.
- Compare a foot-candles value with a value reported in nox.
- Check the fc-to-nx arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Decibel sound-pressure level is logarithmic and depends on the stated reference pressure.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Foot-candles to Nox?
result = input × 10.7639104167 ÷ 0.001 Using the displayed relationship, 1 fc equals 10,763.9104167 nx.
How many Nox are in one Foot-candles?
One Foot-candles is 10,763.9104167 Nox. The displayed digits may be rounded.
Can I reverse the fc to nx conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts nx back to fc.
Is the Foot-candles to Nox result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.