Proportional To Symbol
∝ means “proportional to,” indicating that one quantity changes in proportion to another.
U+221D
The symbol ∝, pronounced “proportional to,” is commonly used in math and science writing. It tells readers that two quantities are related by a constant factor. You can copy it directly or use its Unicode and escape forms in documents and code.
Proportional To Symbol Meaning
∝ (PROPORTIONAL TO, U+221D) expresses a proportional relationship between two quantities. When you write A ∝ B, it means A changes in the same way as B, differing only by a constant multiplier (for example, A = kB for some constant k). The symbol is widely used when the exact constant is unknown or irrelevant to the discussion. It can appear in equations for scaling laws, rate relationships, and simplified forms of formulas. In writing, ∝ helps summarize dependence without committing to a specific coefficient.
Common uses
- •Mathematics to show proportional relationships like A ∝ B
- •Science and physics notes to express scaling or law-of-proportion statements
- •Engineering and data summaries to indicate trends without fixed constants
- •Infographics and diagrams to label “proportional to” axes or factors
- •Technical documentation to simplify formulas when constants aren’t needed
Examples
∝ Proportional to Symbol (U+221D)
- ∝Force ∝ acceleration (for constant mass).
- ∝Distance ∝ time in uniform motion.
- ∝Heat loss ∝ temperature difference.
- ∝The amount needed is ∝ the number of items.
- ∝Error decreases ∝ 1 over sample size.
Variations
Ready to copy
Technical codes
| Unicode | U+221D | |
| HTML Entity | ∝ | |
| HTML Code | ∝ | |
| CSS | \221D |
FAQ
What does ∝ mean?
∝ means “proportional to,” indicating that one quantity varies in proportion to another (A = kB for some constant k).
How do I copy the symbol ∝?
Copy the character directly from this page, or use the HTML entity ∝ / CSS escape \\221D / JavaScript escape \\u{221D}.
Is ∝ the same as = (equals)?
No. = states exact equality, while ∝ states proportional relationship with a constant factor that may differ from 1.
Where is ∝ commonly used?
It’s common in math, science, engineering notes, and design/labeling where you want to describe dependence without specifying the exact constant.