Local LLM VRAM Calculator
Check if your GPU can run a local LLM. Select model, quantisation, and GPU — get instant VRAM estimates.
Most popular — best speed/quality
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It fits!
Comfortable fit — room for other applications
Model weights 4.8 GB
KV cache (4,096 ctx) 0.6 GB
Runtime overhead 0.5 GB
Total VRAM needed 5.9 GB
GPU VRAM available 16 GB
0 GB 37% used 16 GB
Formula
VRAM ≈ (params × bits_per_param / 8)
+ KV_cache(ctx_len, params)
+ overhead(~0.5-1.0 GB)🧠
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