Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Nox to Foot-candles
Convert nx to fc instantly, then review the formula, assumptions, and rounding guidance.
Light & sound unitsInstant result
Decimals
Formula result = input × 0.001 ÷ 10.7639104167. 1 nx = 0.0001 fc
Common examples
One value, several units
Lux0.001 lx
Foot-candles0.0001 fc
Phot0 ph
Conversion table
| nx | fc |
|---|---|
| 1 nx | 0.0001 fc |
| 2 nx | 0.0002 fc |
| 5 nx | 0.0005 fc |
| 10 nx | 0.0009 fc |
| 25 nx | 0.0023 fc |
| 50 nx | 0.0046 fc |
| 100 nx | 0.0093 fc |
Conversion chart
1 nx0.0001 fc
5 nx0.0005 fc
10 nx0.0009 fc
25 nx0.0023 fc
50 nx0.0046 fc
Worked example
1 foot-candle equals approximately 10.7639 lux.
Unit definition
Nox (nx) One nox equals 0.001 lux.
Unit history
Nox 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 nx to lux.
3. Convert the base value to fc and apply your display precision.
Understand the result before using it
Nox to Foot-candles converts a value measured in Nox (nx) into the equivalent value in Foot-candles (fc). 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 × 0.001 ÷ 10.7639104167
Assumptions
- Nox and Foot-candles represent the same illuminance quantity.
- The input is expressed in nx; the output is expressed in fc.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 nx = 0.0000929030400001 fc. 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 nx measurement in a document that expects fc.
- Compare a nox value with a value reported in foot-candles.
- Check the nx-to-fc 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 Nox to Foot-candles?
result = input × 0.001 ÷ 10.7639104167 Using the displayed relationship, 1 nx equals 0.0000929030400001 fc.
How many Foot-candles are in one Nox?
One Nox is 0.0000929030400001 Foot-candles. The displayed digits may be rounded.
Can I reverse the nx to fc conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts fc back to nx.
Is the Nox to Foot-candles 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.