Technology
SSD Lifespan Calculator
Estimate how long your SSD will last based on its TBW endurance rating and your daily write workload.
Check your drive's spec sheet for TBW (Terabytes Written)
Enter your SSD specs and click Calculate
How is this calculated?
Lifespan (years) = TBW × 1000 ÷ Daily_Write_GB ÷ 365
Drive Writes Per Day (DWPD) = Daily_Write_GB ÷ Drive_Capacity_GB
Health at Year N = 100% - (N × 365 × Daily_Write_GB ÷ (TBW × 1000)) × 100%
Example:
600 TBW drive, 30 GB/day writes:
Lifespan = 600,000 GB ÷ 30 GB/day ÷ 365 = 54.8 years
At 5 years: Health = 100% - (5×365×30 ÷ 600,000)×100% = 90.9%FAQ
Frequently asked questions about SSD lifespan
What does TBW mean for SSDs?
TBW (Terabytes Written) is the manufacturer's endurance rating — the total amount of data that can be written to the drive before cells wear out. A 600 TBW drive can handle 600TB of total writes over its lifetime.
How do I check my SSD's current health?
Use tools like CrystalDiskInfo (Windows), smartctl (Linux), or the manufacturer's utility. Look for 'Percentage Used' or 'Media Wearout Indicator' in SMART data.
How much data does a typical user write per day?
Light users (web browsing, office): 5-10 GB/day. Moderate users (development, gaming): 20-40 GB/day. Heavy users (video editing, databases): 50-100+ GB/day.
Can an SSD last longer than its TBW rating?
Yes, often significantly. TBW is a conservative warranty guarantee. Many SSDs exceed their rated TBW by 2-5× before failing. However, plan replacements near the rated limit for critical data.
Does drive capacity affect lifespan?
Yes. Larger drives have more NAND cells to spread writes across (wear leveling), so a 2TB drive will generally last longer than a 500GB drive with the same workload, even at the same TBW rating per TB.
When should I replace my SSD?
Replace when SMART health drops below 10%, if you're approaching the TBW limit, or at 5+ years of age. Always keep backups regardless — SSDs can fail suddenly without gradual degradation.