Reading Time Calculator
If you're thinking "how long will it take me to read this book?"  you'll find the answer in this reading time calculator.
And not just that you can also find the value of any of the variables used in the time to read calculator. You may want to know how much time a day you should allocate to finish a textbook before the deadline. Or maybe you want to assess how many books you should borrow from the library for a 2week holiday? You can use the reading time calculator in many ways, which we'll describe in the text.
Choose a book, grab a coffee or tea and let's see what the calculator can do.
The questions this reading time calculator can answer
Depending on which values you input into the reading time calculator, you can find out:

How much time per day you should allocate to finish in x days;

How long it will take to read this book (how many days);

What the total reading time will be (in hours);

How many pages you'll be able to read in a given time; and

How fast you should read to finish this book on time.
How to use the time to read calculator? How long will it take to read this book?
Depending on your problem, fill in the fields for which you know answers, and leave the one you want to calculate empty. You can also prevent some variables from changing values by clicking the grey area to the right of the variable and choosing "lock".
If you're wondering "how long will it take me to read this book?":

Choose your reading speed. If you want the result to be accurate, measure your reading speed and input the number of pages you can read per minute into the second field of the calculator. You can also change the unit and enter the pages per hour. If you don't have time to test your reading speed, decide whether you're a slow, average or quick reader, and choose the adequate description in the first field.

Enter the book's length into the third field of the reading time calculator.

The total reading time will appear. You can display it in hours, minutes, or hours and minutes.

To assess how many days it will take to read the book, decide on your daily reading time.

The last field will tell you in what time you'll finish the book. The time to read calculator lets you display the number in different units.
Calculating reading time  an example
Another reallife example  you're going to have a major test in three months, and you want to work a textbook (300 pages) over before the deadline. How long will it take to read this book? How much time should you allocate to studying each day?
How to solve this problem using the reading time calculator:

Check how long it takes you to finish one page. Let's say the book is quite heavy and it takes you ~3 minutes to go through one page. Then divide 1 by the number of minutes to get the reading speed (turn a fraction into a decimal):
1/3 ≈ 0.33
.0.33 pages/min, let's input the number into the second field of the time to read calculator.

In the third field, enter the book's length  300 pages.

You can see it will take you about 15 h 9 min to finish the book.

How many days will you devote to studying the book? Let's say you want to finish it in 2 months and then brush up on the material. You study for five days a week. There are around four full working weeks in a month, so there are
2 * 4 * 5 = 40
days in total. Let's say you want to complete the book in 40 days  type in "40" in the last field of the time reading calculator. 
That's it, in the "daily reading time" section you'll see you should spend around 22 minutes per day reading. The time reading calculator will also tell you that you should read 7.5 pages a day.