# Llm Requirements Calculator — MCP tool `findutils:llm_requirements_calculator`

Estimate the VRAM, system RAM, and disk space needed to run an open-weight LLM locally, and which common GPUs and Macs it fits on. Covers Llama, Mistral, Qwen, DeepSeek, Gemma, Phi, Code Llama, Command R, Yi, SmolLM, StableLM, Grok, Falcon, and MiniCPM across FP32 through Q2_K quantization.

- Category: calculators
- MCP server: https://mcp.findutils.com/ (Streamable HTTP, no API keys, 120 req/min per IP)
- REST endpoint: POST https://api.findutils.com/api/tools/llm-requirements-calculator/execute (no API keys, 60 req/min per IP)
- Reference page: https://findutils.com/mcp/llm-requirements-calculator/
- Same tool on the other surface: https://findutils.com/api/llm-requirements-calculator/

## Connect

```bash
claude mcp add findutils --transport http https://mcp.findutils.com/
```

Claude Desktop (`claude_desktop_config.json`):

```json
{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}
```

## Call the tool (verified example)

```bash
curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "llm_requirements_calculator",
      "arguments": {
        "model": "llama-3.1-8b",
        "quantization": "q4_k_m",
        "context_length": 8192
      }
    }
  }'
```

## Input schema

| Argument | Type | Required | Description |
|---|---|---|---|
| `model` | string (llama-3.2-1b \| llama-3.2-3b \| llama-3.1-8b \| llama-3.1-70b \| llama-3.1-405b \| mistral-7b \| mistral-nemo \| mixtral-8x7b \| mixtral-8x22b \| mistral-small-3 \| qwen-2.5-0.5b \| qwen-2.5-1.5b \| qwen-2.5-3b \| qwen-2.5-7b \| qwen-2.5-14b \| qwen-2.5-32b \| qwen-2.5-72b \| qwen-2.5-coder-7b \| qwen-2.5-coder-32b \| qwen-qwq-32b \| deepseek-r1-distill-7b \| deepseek-r1-distill-14b \| deepseek-r1-distill-32b \| deepseek-r1-distill-70b \| deepseek-v3 \| deepseek-r1 \| gemma-2-2b \| gemma-2-9b \| gemma-2-27b \| phi-3-mini \| phi-3-medium \| phi-4 \| codellama-7b \| codellama-13b \| codellama-34b \| codellama-70b \| qwen-3-0.6b \| qwen-3-1.7b \| qwen-3-4b \| qwen-3-8b \| qwen-3-14b \| qwen-3-32b \| qwen-3-235b \| command-r-35b \| command-r-plus \| yi-1.5-6b \| yi-1.5-9b \| yi-1.5-34b \| smollm-2-135m \| smollm-2-360m \| smollm-2-1.7b \| stablelm-2-1.6b \| stablelm-2-12b \| grok-1 \| falcon-3-1b \| falcon-3-3b \| falcon-3-7b \| falcon-3-10b \| minicpm-3-4b) | yes | Model id (or exact display name). One of: llama-3.2-1b, llama-3.2-3b, llama-3.1-8b, llama-3.1-70b, llama-3.1-405b, mistral-7b, mistral-nemo, mixtral-8x7b, mixtral-8x22b, mistral-small-3, qwen-2.5-0.5b, qwen-2.5-1.5b, qwen-2.5-3b, qwen-2.5-7b, qwen-2.5-14b, qwen-2.5-32b, qwen-2.5-72b, qwen-2.5-coder-7b, qwen-2.5-coder-32b, qwen-qwq-32b, deepseek-r1-distill-7b, deepseek-r1-distill-14b, deepseek-r1-distill-32b, deepseek-r1-distill-70b, deepseek-v3, deepseek-r1, gemma-2-2b, gemma-2-9b, gemma-2-27b, phi-3-mini, phi-3-medium, phi-4, codellama-7b, codellama-13b, codellama-34b, codellama-70b, qwen-3-0.6b, qwen-3-1.7b, qwen-3-4b, qwen-3-8b, qwen-3-14b, qwen-3-32b, qwen-3-235b, command-r-35b, command-r-plus, yi-1.5-6b, yi-1.5-9b, yi-1.5-34b, smollm-2-135m, smollm-2-360m, smollm-2-1.7b, stablelm-2-1.6b, stablelm-2-12b, grok-1, falcon-3-1b, falcon-3-3b, falcon-3-7b, falcon-3-10b, minicpm-3-4b. |
| `quantization` | string (fp32 \| fp16 \| q8_0 \| q6_k \| q5_k_m \| q4_k_m \| q3_k_m \| q2_k) | no | Quantization id. Default: "q4_k_m". Default: `"q4_k_m"`. |
| `context_length` | integer | no | Context window in tokens (512-131072). Default: 8192. Default: `8192`. |
| `batch_size` | integer | no | Concurrent sequences (1-64). Default: 1. Default: `1`. |

Example arguments (verified):

```json
{
  "model": "llama-3.1-8b",
  "quantization": "q4_k_m",
  "context_length": 8192
}
```

## Also a REST endpoint

```bash
curl -X POST https://api.findutils.com/api/tools/llm-requirements-calculator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "model": "llama-3.1-8b",
    "quantization": "q4_k_m",
    "context_length": 8192
  }'

# Parameter schema
curl https://api.findutils.com/api/tools/llm-requirements-calculator
```

Full REST reference: https://findutils.com/api/llm-requirements-calculator/ · OpenAPI 3.1 spec: https://findutils.com/api/openapi.json

---
Full catalog: POST https://mcp.findutils.com/ with method `tools/list` · https://findutils.com/mcp/ · https://findutils.com/llms.txt