@untemps/read-per-minute

Class to parse a long text and return an estimated reading time based on a lang rate.

Installation

yarn add @untemps/read-per-minute

Usage

Import the functions:

import { parse, isLangExist, rates } from '@untemps/read-per-minute'

Call parse with a string and a lang (see Override the value for a one-time parsing for an alternative usage):

parse('Long text', 'en')

The parse function returns an object with the following properties:

Property	Description
time	The estimated reading time in minutes
words	The number of words in the text
rate	The rate value used to calculate the reading time

Default Rates

Default rate values come from "How many words do we read per minute? A review and meta-analysis of reading rate" by Marc Brysbaert - Department of Experimental Psychology Ghent University

Lang	Rate
default	200
ar	181
zh	260
nl	228
en	236
fi	195
fr	214
de	260
he	224
it	285
ko	226
es	278
sv	218

If the lang is not listed or is undefined, the default value will be used instead.

Custom Rates

Override all the values

You can specify an entire custom rates object as the third parameter of parse or isLangExist:

const customRates = {
	default: 220,
	ar: 191,
	zh: 255,
	nl: 234,
	en: 244,
}
parse('Long text', 'en', customRates)
isLangExist('en', customRates)

NOTE: Set a default property in the object if you want the parsing to fallback to a specific value. Otherwise, the static value will be used (rates.default).

Override the value for a one-time parsing

Simply pass the desired custom reading rate in words per minute instead of a language code:

// For very fast readers: 425 words per minute.
parse('Long text', 425)

NOTE: The custom reading rate must be greater than zero or the default value will be used.