In When I Don’t Desire God John Piper demonstrates how much reading you could do in 1 year simply by reading for 15 minutes each day.

Suppose you read slowly like I do–maybe about the same speed that you speak–200 words a minute. If you read fifteen minutes a day for one year (say just before supper, or just before bed), you will read 5,475 minutes in the year. Multiply that by 200 words a minute, and you get 1,095,000 words that you would read in a year. Now an average serious book might have about 360 words per page. So you would have read 3,041 pages in one year. That’s ten very substantial books. All in fifteen minutes a day.

Or, to be specific, my copy of Calvin’s Institutes has 1,521 pages in two volumes, with an average of 400 words per page, which is 608,400 words. That means that even if you took a day off each week, you could read this great biblical vision of God and man in less than nine months (about thirty-three weeks) at fifteen minutes a day.