How to calculate GPU memory requirements for AI models?

GPU memory requirements depend on model parameters, precision (FP16/INT8/INT4), batch size, sequence length, and KV cache. Our calculator considers all these factors to provide accurate estimates.

What AI models are supported?

We support popular models including Qwen, ChatGLM, DeepSeek, Llama, Baichuan, Yi, and custom models. Both language models and multimodal models are supported.

How accurate are the memory calculations?

Our calculations are based on scientific formulas considering model weights, KV cache, intermediate activations, and system overhead. The accuracy is typically within 5-10% of actual usage.

GPU Memory Calculator - AI Model VRAM Requirements

Scenario Parameter Configuration

Please fill in your AI inference scenario parameters. The system will automatically calculate memory requirements and recommend suitable server configurations.

Inference Model Configuration

Model Name #1

Model Type

Select Preset Model

Model Name

Parameter Size (B)

Hidden Dimension

Layers

Model Precision

Auxiliary Model Configuration

Enable Embedding Model

Enable Rerank Model

Enable OCR Model

Business Load Configuration

Batch Size

Sequence Length

Concurrent Users

Queries Per Second (QPS)

System Configuration

KV Cache Ratio (%)

Memory reservation ratio for caching key-value pairs

System Overhead Ratio (%)

CUDA runtime, drivers and other system components usage

💡 Calculation Logic Explanation

System Overhead Calculation:

System Overhead = (Model Weights + KV Cache + Intermediate Activations + Auxiliary Models) × System Overhead Ratio

Total Memory = Base Memory Requirements + System Overhead

Explanation:

• System overhead includes memory usage by CUDA runtime, GPU drivers, inference frameworks, etc.

• Recommended setting is 15-25%, can be increased for complex deployment environments

• This ratio is dynamically calculated based on actual business memory requirements to ensure sufficient buffer

Calculation Results

Memory requirements and server recommendations based on your configuration parameters.

Waiting for Calculation

Please configure scenario parameters and click "Calculate Memory Requirements" button

GPU Memory Calculator for AI Models - Professional VRAM Requirements Tool

Supported AI Models

Key Features