AI video looks cheap until the render queue starts. A short clip can cost more than a long one if it is high resolution, high frame rate, or generated in many takes.
The way to estimate it honestly is per second, not per video. Start with how many seconds of finished video you need, then multiply by the cost per second for the resolution and model tier you actually plan to use. That gives the base render cost.
Then add the retakes. Most projects need several generations per usable second, so multiply the base by a realistic takes factor — two or three is a planning starting point, not a promise.
Then add the extras people forget: upscaling, longer cuts that get trimmed, and the minutes spent generating versions that never ship. Those extras are still billed time.
Run the estimate for a short case, a typical case, and a heavy case, the same way you would for an API bill. If the heavy case breaks your budget, shorten the clip, lower the resolution for drafts, or cut the takes before you render, not after.
You can test those three cases quickly with this AI video cost calculator, and it also links back to AI Calculators for the rest of the AI cost tools. Use it as a planning check, not as an invoice, because model rates change.
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