SSD TBW / DWPD Calculator
Relate an SSD TBW rating to capacity and an intended usage period.
DWPD is a theoretical ratio based on TBW, capacity and period; it does not predict real SSD lifespan on its own.
What this tool does
TBW and DWPD describe the write endurance specified for an SSD. This calculator converts those ratings into an approximate daily or lifetime write budget to compare workloads; it cannot predict an individual drive’s failure date or replace the manufacturer warranty terms.
How to use it
Enter the values requested by the calculator and check the result together with the notes shown below it.
Practical example
Use a realistic example from your own setup to compare scenarios. The result is a reference, not a replacement for manufacturer specifications.
How to interpret the result
Treat the result as an estimate whenever real-world factors are not available to the browser. For hardware, network or safety decisions, verify the relevant technical specifications.
Frequently asked questions
What does TBW mean?
Terabytes written: the total amount of data the manufacturer guarantees can be written to the SSD over its lifetime.
How much do I actually write per day?
In home use it is usually low, a few GB a day. You can check it in the manufacturer’s software or the drive’s SMART data.