Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Cheaper option
Renting is cheaper
Net cost if you buy & resell
$86.00
Total rental cost
$45.00
Savings choosing the cheaper option
-$41.00
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How to use this
- 1Enter rental price for the term ($).
- 2Enter purchase price ($).
- 3Enter expected resale/buyback value ($).
- 4Enter probability you successfully resell (%).
- 5Enter terms you'll use the book.
- 6Read your cheaper option on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Renting a textbook looks cheaper upfront, but buying and reselling at term's end can beat rental cost if resale value holds up, especially for books used across multiple terms. This calculator compares total rental cost against purchase price minus expected resale value, accounting for the chance a resale buyback falls through.
Worked example
Using the values the calculator loads with:
Inputs
- Rental price for the term: 45 $
- Purchase price: 130 $
- Expected resale/buyback value: 55 $
- Probability you successfully resell: 80 %
- Terms you'll use the book: 1
Results
- Cheaper option: Renting is cheaper
- Net cost if you buy & resell: $86.00
- Total rental cost: $45.00
- Savings choosing the cheaper option: -$41.00
What each field means
Inputs
- Rental price for the term ($)
- The rental price for the term used in the calculation, measured in $. Starts at 45 $ so you have a working example on load.
- Purchase price ($)
- The purchase price used in the calculation, measured in $. Starts at 130 $ so you have a working example on load.
- Expected resale/buyback value ($)
- The expected resale/buyback value used in the calculation, measured in $. Starts at 55 $ so you have a working example on load.
- Probability you successfully resell (%)
- The probability you successfully resell used in the calculation, measured in %. Starts at 80 % so you have a working example on load. Accepted range: 0–100 %.
- Terms you'll use the book
- The terms you'll use the book used in the calculation. Starts at 1 so you have a working example on load. Accepted range: 1–4.
Results
- Cheaper option
- Returned as a plain value and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Net cost if you buy & resell
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total rental cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Savings choosing the cheaper option
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Why factor in resale probability instead of assuming full resale?
Buyback prices swing with edition changes and demand; a new edition can drop resale value to near zero right before you sell. Discounting by probability gives a more honest expected cost than assuming a best case.
Does renting have hidden risks?
Yes — highlighting/writing beyond normal wear, late returns, and lost-book fees can turn a $45 rental into a $150+ charge. Buy if you know you write heavily in books.
Is buying better for multi-term use?
Almost always, since the purchase cost is spread across multiple terms while rental cost repeats each term — check the multi-term case with the terms input set above 1.
Do digital rentals change this math?
Digital access codes are usually cheaper than physical rental but have zero resale value and often expire, so they only win on pure lowest-price grounds, not on the buy-and-resell comparison.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Textbook Rental vs Buy Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/textbook-rental-vs-buy
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/textbook-rental-vs-buy" target="_blank" rel="noopener">Textbook Rental vs Buy Calculator — RevenueLab</a> (2026).</p>
Source: [Textbook Rental vs Buy Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/textbook-rental-vs-buy) (2026).