# Free AI video tools and calculators

Source: https://windflow.online/tools

- [AI video API cost calculator](https://windflow.online/tools/ai-video-cost-calculator): Calculate realtime AI video API cost by model, session duration and concurrent users. Compare published rates with a free browser-based estimator.
- [AI video prompt generator](https://windflow.online/tools/ai-video-prompt-generator): Build a video prompt from a subject, action, camera move, lighting and visual style. Copy the result and explore practical AI video prompt examples.
- [AI video and world model selector](https://windflow.online/tools/ai-video-model-selector): Find a hosted AI video or world model by text, image, camera, movement and audio requirements. Compare supported inputs and published session pricing.
- [Video streaming bandwidth calculator](https://windflow.online/tools/video-bandwidth-calculator): Estimate video streaming data use from bitrate, duration and viewers. Convert Mbps to GB per hour and calculate audience bandwidth in your browser.
- [Video frame count calculator](https://windflow.online/tools/video-frame-calculator): Convert video duration and frame rate into frame count. Estimate generation chunks, playback time and frame budgets with a free browser calculator.
- [Video latency budget calculator](https://windflow.online/tools/video-latency-calculator): Estimate a video latency budget from generation, network, buffering and decoding. See each component's share and plan a measurable response-time target.