Dashes show a relationship. Generally, en dashes for spans are less accessible for users than a phrase. Use spaced en dashes to set off non-essential information in sentences.
Use the correct symbols for en dash and minus sign
En dashes are half the width of the font height. Use them as a type of punctuation.
Don’t use an en dash instead of a minus sign. Screen readers will read dashes as dashes, not as the minus sign.
In Unicode, the en dash is U+2013.
To make sure screen readers read the minus sign, use the mathematical symbol for minus. In Unicode, this is U+2212.
Don’t confuse the dash or the minus symbol for a hyphen.