SSD DWPD Calculator: Check your SSD's Daily Writes Per Day

DWPD stands for Drive Writes Per Day. It is a useful SSD metric for high-end users. If you use your drive for heavy read/write operations, knowing DWPD can help you easily determine your drive’s capabilities.

To calculate the Drive Writes per day, we need the drive’s capacity, warranty periods, and TBW (which can be found on the SSD’s webpage). If you are not able to find the Warranty and TBW of your drive, search for your drive in the TechPowerUp SSD database.

Simple DWPD calculator

The simple DWPD calculator is good to use for the new SSDs or if you are planning to buy a new one. If you have used your drive for some time, this tool may not give you precise numbers. For that, you can find the tool below.

DWPD Calculator (New SSD)

Enter SSD Capacity:

Enter Total TBW (Terabytes Written): Enter Warranty Period (Years):

DWPD calculator for used SSDs

You can also find or estimate the DWPD and TBW of the used SSDs. For that, you just have to find how much data has been written in total inside your SSD. Because SSDs have limited program/erase cycles, the SMART data can show you how much of these cycles are used and by subtracting it from the total TBW, we can easily estimate the remaining TBW and the DWPD as well.

Find the remaining TBW first

For used drives, you’ll first have to get the remaining TBW. To check these, you can use the CrystalDiskInfo tool and check for the total host write number. I have explained the complete process of doing so in this article.

Here is the tool to find the remaining TBW of your SSD. If the total host write is in GB, convert it to TB first.

Calculate the remaining DWPD of a Used SSD

Remaining TBW Calculator

Enter Total TBW (Terabytes Written): Enter Total Host Writes (Terabytes):

Remaining DWPD Calculator (Used SSD)

DWPD Calculator (Used SSD)