Micro Sign µ vs Greek Mu μ: What’s the Difference?
µ and μ often look identical, but they are different Unicode characters. The SI prefix micro uses the same mu-shaped symbol, so encoding and measurement rules need to…
Read more →Category
Symbol Comparisons
µm vs um: Is “um” the Same as the Micrometre Symbol?
µm and μm use mu-shaped Unicode characters; um is a plain-ASCII fallback. They may mean micrometre in context, but they are not the same text.
Read more →Ohm Sign Ω vs Greek Omega Ω: Which Character Should You Use?
Ω has the historical Unicode name OHM SIGN, but modern ohm notation uses Ω, the ordinary Greek capital omega. Unicode treats the two as canonically equivalent.
Read more →Angstrom Sign Å vs Å: Why They Look the Same
Å and Å can look identical because Unicode treats them as canonically equivalent. For the angstrom unit, modern text should use the ordinary Å character.
Read more →Kelvin Sign K vs Letter K: Why Unicode Treats Them as Equivalent
K is a legacy Unicode character that normalizes to ordinary K. The modern SI symbol for kelvin is simply the capital Latin letter K.
Read more →Percent % vs Per Mille ‰ vs Per Ten Thousand ‱: What’s the Difference?
Percent, per mille, and per ten thousand use different denominators. Changing %, ‰, or ‱ without changing the number changes the value.
Read more →Arcminute ′ vs Minute min: Same Word, Different Quantity
“Minute” can mean an angular subdivision or a unit of time. Arcminutes use the prime sign ′; time minutes use min.
Read more →Arcsecond ″ vs Second s: How to Tell Angle from Time
Arcseconds use the double prime ″; seconds of time use s. The same ″ character can also mean inches, so context matters.
Read more →Litre L vs l vs ℓ vs 1: Which Symbol Is Correct?
Both L and l are accepted litre symbols. Script ℓ is a related historical character, and uppercase L is often preferred because it is harder to confuse with…
Read more →k vs K in Measurement: Kilo Prefix vs Kelvin Unit
Lowercase k is the kilo prefix; uppercase K is the kelvin unit symbol. In SI notation, case is part of the meaning, not a styling choice.
Read more →