单位换算器
Memory Card Video Size and Recording Time Estimates 指南
本指南说明 Use bitrate, file size, and storage capacity together when estimating recording time.
使用流程
Use this guide when a converted number affects cameras, phones, drones, memory cards, video backups, and storage planning. A reliable result keeps the original value, source unit, target unit, conversion factor, and rounding choice visible.
The goal is not to memorize every factor. The goal is to make the calculation traceable enough that someone else can review it later.
检查清单
- Convert Mbps to MB/s before comparing with storage size.
- Leave spare capacity for metadata, thumbnails, and file system overhead.
- Check whether the device uses variable bitrate.
实用事实
Video bitrate controls how quickly storage fills, not just the resolution label.
实用示例
100 Mbps is 12.5 MB/s before overhead.
A 64 GB card stores less than 64 GiB in binary terms.
Recording time = capacity / data rate.
常见问题
What should I check first?
Confirm the source unit and target unit before changing the number.
When should I round?
Round at the end, after formulas and related conversions are complete.
Which calculator should I use next?
Use the related calculators below to check the main values from this guide.
相关计算器
重点
A useful conversion is traceable: it shows the original unit, the target unit, the factor used, and the rounding decision.