Vector Database Storage Calculator
Estimate vector storage from count, dimensions and precision.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Vector Database Storage Calculator
How to use this tool
- Enter the vector count, dimensions and numeric format, plus any index overhead percentage.
- Press Generate. The tool multiplies count x dimensions x bytes per value, adds overhead, and converts the total.
- Use Load sample for 1,000,000 vectors of 1,536 float32 dimensions, or Clear to start again.
Worked example
For 1,000,000 vectors x 1,536 dimensions x 4 bytes (float32) with 0% overhead, the total is 6,144,000,000 bytes, which is 6.14 GB (decimal) or 5.72 GiB (binary).
What this tool does not do / Limits
This estimates raw vector bytes plus the overhead percentage you enter. Real index files also hold metadata, IDs and graph structures that vary by database and settings, so treat the result as a planning estimate, not a quoted disk size.
Frequently asked questions
What is the difference between GB and GiB?
GB divides by 1,000,000,000 (decimal, as disk makers quote) while GiB divides by 1,073,741,824 (binary, as operating systems often show). The same bytes give a smaller GiB number.
Why does float16 halve the size?
float16 stores each number in 2 bytes instead of float32's 4, so the same vectors take half the raw space — at the cost of lower numeric precision.
Related tools
JSON Studio
Format, validate, minify, query and compare JSON in your browser, with precise line-and-column errors.
LiveRegex Tester
Test patterns against sample text with match highlighting, capture groups and a safe one-second timeout.
LiveSecurity Header and DNS Checker
Check HSTS, CSP and other security headers, TLS details, and DNS/email authentication records (SPF, DKIM, DMARC).
Live