CalculatorCast
数学 金融 健康・フィットネス 日付と時間 単位変換 コンピューター 物理学 化学 建設 工学 統計学 教育 日常生活 生物学 自動車 料理・食品 スポーツ・フィットネス 不動産 写真 電気 農業 旅行 ビジネス
すべての計算機 お気に入り ()
English Español Français Deutsch Português Italiano Nederlands Polski Türkçe 日本語 한국어 Svenska Norsk Dansk Suomi עברית

メモリーカード容量計算機

メモリーカードの撮影可能枚数や動画の録画時間を見積もります。

はじめに

Memory Card Capacity Calculator — Estimate photo count or video recording time for a memory card. Enter Card Capacity, Avg Photo File Size, Video Bitrate, Usable Capacity Factor to get an instant, accurate result.

計算式

Photo count = (card capacity in GB × 1000 × usable-capacity factor) / average file size (MB). Video recording time (minutes) = (card capacity in GB × 8000 × usable-capacity factor) / video bitrate (Mbps), converting bytes of storage to bits of video data. A default usable factor of 0.93 accounts for formatting overhead and manufacturer GB-vs-GiB labeling.

ステップごとの説明

  1. Enter the Card Capacity.
  2. Enter the Avg Photo File Size.
  3. Enter the Video Bitrate.
  4. Enter the Usable Capacity Factor.
  5. Click Calculate to see your result instantly.

実例

Example: With Card Capacity = 128 GB, Avg Photo File Size = 25 MB, Video Bitrate = 100 Mbps, Usable Capacity Factor = 0.93, the Memory Card Capacity Calculator gives Num Photos: 4761.6, Recording Time Minutes: 158.72.

よくある質問

Why isn't the usable capacity 100% of the rated card size?
Card manufacturers label capacity in decimal gigabytes (1 GB = 1,000,000,000 bytes), while formatting and file-system overhead reduce the space actually available — a 0.93 factor approximates this real-world usable capacity.
Can I estimate both photo and video capacity at once?
Yes, enter both an average photo file size and a video bitrate to see results for each side by side.
What inputs does the Memory Card Capacity Calculator need?
You'll need to provide: Card Capacity, Avg Photo File Size, Video Bitrate, Usable Capacity Factor. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Memory Card Capacity Calculator?
The Memory Card Capacity Calculator applies the formula exactly as calculated — Photo count = (card capacity in GB × 1000 × usable-capacity factor) / average file size (MB). Video recording time (minutes) = (card capacity in GB × 8000 × usable-capacity factor) / video bitrate (Mbps), converting bytes of storage to bits of video data. A default usable factor of 0.93 accounts for formatting overhead and manufacturer GB-vs-GiB labeling. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Memory Card Capacity Calculator free to use?
Yes, the Memory Card Capacity Calculator is completely free, requires no signup, and runs instantly in your browser.

メモリーカード容量計算機について

The Memory Card Capacity Calculator uses a real, verifiable formula — Photo count = (card capacity in GB × 1000 × usable-capacity factor) / average file size (MB). Video recording time (minutes) = (card capacity in GB × 8000 × usable-capacity factor) / video bitrate (Mbps), converting bytes of storage to bits of video data. A default usable factor of 0.93 accounts for formatting overhead and manufacturer GB-vs-GiB labeling. — so results are accurate every time, not an approximation.