Tarsnap Calculator (really just a Cost Estimator)
This tool estimates Tarsnap backup costs based on the official pricing model: 250 picodollars per byte-month for storage and 250 picodollars per byte for bandwidth. All calculations use the SI definition where 1 Gigabyte (GB) = 109 bytes.
N.B., these are rough estimates provided without any guarantee of perfect accuracy. In particular, if we wanted to be truly accurate, we would actually calculate prices in attodollar-days based on how many days the month has, and that would require you, dear reader, to put in what today's date was, etc., ... it would be a mess. So caveat emptor, even though Dr. Percival's pricing really is quite elegant.
(This humble calculator is not associated with Tarsnap or its creator in any way. Just a fan!)
Custom Amount Calculator
Enter the exact amount of unique encoded data in bytes to see your estimated costs. 1,000,000,000 bytes, our starting value, is 1 GB in the tarsnap model; in many other places 1 GB means something slightly larger, at 2^30 = 1,073,741,824 bytes.
Standard Unit Cost Reference
This table shows the recurring storage costs for standard SI (decimal) units.
| Unit Name | SI Multiplier (bytes) | Cost per Month | Cost per Year |
|---|