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Memory Card Calculator

Last reviewed: June 24, 2026 · Formula version: MEMORY_CARD-1.0 · Formula-backed planning calculator

Estimate photo and video card capacity

Estimate how many photos or how much video a memory card can hold using card size, average file size, video bitrate, and codec assumptions.

Server-rendered example result

Example: Input: 128 GB card, 25 MB photos, 100 Mbps video. Output: about 5,120 photos or about 170 minutes of video before buffer.

The interactive result cards update this example when JavaScript runs, but this default snapshot is crawlable and printable.

Quick answer

A 128 GB card with 25 MB photos holds roughly 5,120 photos before real-world formatting and camera reserves. At 100 Mbps video, it holds about 2.8 hours before reserves.

Best for: comparing realistic scenarios before acting. Not for: final professional approval, emergency decisions, or replacing product labels and local requirements.

How to use the calculator

  1. Enter the measurements, quantities, costs, or target values requested above.
  2. Adjust optional assumptions such as waste, overhead, product strength, retention days, or multipliers.
  3. Read both the main result cards and any warning notes. The warnings are part of the answer, not fine print.
  4. Use the share, copy, or print/PDF controls when you want to save the scenario.

What the results mean

The first result card is the primary decision number. Supporting cards explain capacity, cost, efficiency, safety margin, input assumptions, or the next value to check. When the page returns a range, treat it as a planning envelope rather than a guaranteed price.

Formula / methodology

Photo count = card MB ÷ average file MB. Video time = card bits ÷ bitrate. Use a buffer because cards may not provide their full labeled capacity.

Assumptions and limitations

  • Inputs are assumed to be measured accurately and entered in the units shown.
  • Rounding is intentional so the result is easier to use in real decisions.
  • Vendor-specific behavior, local code, product labels, and regional pricing can override a generic calculator.
  • High-risk medical, legal, tax, and emergency calculators are intentionally not published without expert review.

Example calculation

Input: 128 GB card, 25 MB photos, 100 Mbps video. Output: about 5,120 photos or about 170 minutes of video before buffer.

Server-rendered example result

Example: Input: 128 GB card, 25 MB photos, 100 Mbps video. Output: about 5,120 photos or about 170 minutes of video before buffer.

The interactive result cards update this example when JavaScript runs, but this default snapshot is crawlable and printable.

Common mistakes

  • Assuming every photo has the same file size.
  • Ignoring codec and bitrate for video.
  • Forgetting that formatted capacity is lower than the label.
  • Planning a shoot without spare cards.

FAQ

What formula does this page use?

Photo count = card MB ÷ average file MB. Video time = card bits ÷ bitrate. Use a buffer because cards may not provide their full labeled capacity.

What changes the result the most?

The most important inputs are the size, count, rate, target, or unit assumptions shown in the calculator.

Is this a final professional answer?

No. Treat it as a planning result and verify important decisions against product documentation, labels, quotes, local code, or professional guidance.

Why does this page show warnings?

Warnings call out assumptions that can materially change the result or create safety, cost, or reliability problems.

Can I share this scenario?

Yes. The share button copies a URL with the current inputs, while the canonical page remains the base calculator URL.

Last reviewed

Last reviewed: June 24, 2026. Formula version: MEMORY_CARD-1.0. Index status: indexable.