How to use this tool
- Enter free gb, maps gb, days, daily gb, reserve gb.
- Use consistent units shown beside each input. Run the calculation and review the assumptions below.
Try this example
{
"free_gb": 20,
"maps_gb": 3,
"days": 10,
"daily_gb": 1.2,
"reserve_gb": 2
}Accuracy and scope
Decimal GB throughout, with constant daily recording use and a protected reserve. Does not inspect a device, compression settings, filesystem overhead or automatic cloud deletion.
Is my data uploaded?
This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.