Convert Between Units of Mass
Luminous flux measures the total amount of visible light emitted by a source. The standard unit is the lumen (lm). It is commonly used to compare the overall light output of bulbs, fixtures, and lamps. Converting luminous flux units can help when interpreting lighting specifications, product listings, and photometric documentation that use different formats.
About Mass Conversions
Helpful context and notes for converting Mass units.
Luminous flux is often confused with luminous intensity (candela) and illuminance (lux). Lumens describe total light output, candelas describe intensity in a particular direction, and lux describes light arriving on a surface area. A high-lumen light can still have a low spotlight intensity if it spreads light widely. When comparing products, confirm whether the spec you are reading is total lumens, beam intensity, or surface illuminance.
Practical tip: if you are trying to light a workspace, look for lux targets at the working plane, not only lumen totals. If you are comparing bulbs, lumens are a useful first-order metric, especially when paired with wattage to estimate efficacy. When specs look contradictory, it is often because one source is quoting lumens and another is quoting candelas, which are not directly interchangeable without beam geometry.
Frequently Asked Questions
Fun Fact
One mechanical horsepower is about the power of a very determined horse - or about what it takes to justify buying a louder car than you really need.
Supported Units
Common and engineering-specific units supported for this conversion.
- assay_ton (Assay Tons)
- carat (Carats)
- ckg (centikilograms)
- Da (Daltons)
- dakg (decakilograms)
- dkg (decikilograms)
- dr (drams)
- Gkg (gigakilograms)
- grain (Grains)
- g (grams)
- hkg (hectokilograms)
- kg (kilograms)
- kkg (kilokilograms)
- uk_cwt (Long Hundredweights)
- L/T (long tons)
- Mkg (megakilograms)
- metric_ton (Metric Tons)
- μg (micrograms)
- μkg (microkilograms)
- mg (milligrams)
- mkg (millikilograms)
- nkg (nanokilograms)
- oz (ounces)
- pkg (picokilograms)
- lbm (Pounds)
- cwt (Short Hundredweights)
- dwt (Short Pennyweights)
- S/T (short tons)
- slug (slugs)
- st (stones)
- Tkg (terakilograms)
- ton (Tons)
- t (tonnes)
- uk_ton (UK Tons)
Unit Categories
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