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Precision Tool

VRAM Calculator

Estimate memory footprint by model size, precision, sequence length, and batch configuration before you commit to a deployment or local setup.

Weights + KV cache + overheadUseful for local inference and server planningBest used before renting GPUs or scaling prompts

How to use this calculator

  1. 1. Search for the model you actually plan to run, not a nearby family member.
  2. 2. Test multiple precisions because FP16, INT8, and INT4 can change feasibility completely.
  3. 3. Increase sequence length and batch size to reflect real usage, not just demo prompts.
  4. 4. Leave headroom for runtime overhead instead of targeting a perfect 100% GPU fill.

What teams often miss

Weight size alone is not the whole story. Longer context windows, KV cache growth, framework overhead, and concurrency can turn a model that “fits” on paper into one that fails in real usage.

If you need a hardware recommendation after this estimate, continue to the GPU picker.

Precision Tool

Best next check

Compare the winning estimate against real GPU options so you can see whether the fit is consumer, workstation, or server-class.

Use this before buying

This tool is most valuable before hardware purchase, cloud reservation, or self-hosting commitments. It helps avoid choosing a model that quietly exceeds your real memory budget.