Style for numbers and measurements supports accessibility and readability for users.
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Choosing numerals or words
Numbers as numerals are generally easier for people to scan. Numbers as words remain a convention that people expect in some types of content.
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Currency
Use the correct numbers, words and symbols for currency so people are clear about the amount.
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Dates and time
Dates and times need to be readable. Write, abbreviate and punctuate dates and times consistently so people can understand your content.
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Fractions and decimals
Decimals are useful when people need a precise value. Fractions are useful when an exact value is not important.
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Mathematical relationships
Words can express mathematical relationships in most content. Code mathematical expressions in specialist content so it’s accessible.
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Measurement and units
Standard units of measurement support readability and accuracy. Express precise values for users by combining numerals with the correct unit symbol.
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Ordinal numbers
Ordinal numbers, such as ‘first’, ‘second’ and ‘third’, show the order, position or importance of things in a list or sequence.
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Percentages
Percentages help people compare things and understand proportions. Use numerals with the percentage sign. Be concise when you write about percentages.
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Telephone numbers
Write telephone numbers so people can read and use them easily. There are rules for grouping the numbers, using spacing and creating links.