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DWPD, TBW, PBW, GB/day Calculator (beta)

This tool performs conversion between SSD endurance parameters - DWPD, TBW, PBW, GB/day.

SSD specification:

SSD #1: Capacity (GB): 
Endurance: 
Warranty (yr.): 
SSD #2: Capacity (GB): 
Endurance: 
Warranty (yr.): 
SSD #3: Capacity (GB): 
Endurance: 
Warranty (yr.): 

SSD #1SSD #2SSD #3
Capacity (GB)480480
Warranty (yr.)55
DWPD0.1461.079
TBW128945
PBW0.1280.945
GB/day70517.808
Time periodAverage host-side write data rate (MB/s) needed for reaching DWPD value within specified time period
8 hr.2.4317.98
12 hr.1.6211.99
24 hr.0.815.99

DWPD or DW/D - Drive Writes Per Day.

GB/day - Gigabytes written per day.

TBW - Terabytes Written.

PBW - Petabytes Written.

Given S - disk capacity in GB and T - warranty / useful life period in years, conversion between different SSD endurance specifications can be performed as follows: DWPD = GB/day ÷ S DWPD = (TBW * 1000) ÷ (S * T * 365) GB/day = DWPD * S GB/day = (TBW * 1000) ÷ (T * 365) TBW = (DWPD * S * T * 365) ÷ 1000 TBW = (GB/day * T * 365) ÷ 1000 PBW = TBW ÷ 1000

Notes:
1 PB = 1000 TB and 1 TB = 1000 GB.
1 year = 365 days.
This tool is a beta version and we welcome your feedback.

See also:
SSD RAID Performance Calculator
SSD Useful Life Calculator