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Battery Life Calculator

Estimate shot count from a CIPA battery rating, scaled to any battery size.

Introduction

Battery Life Calculator — Estimate shot count from a CIPA battery rating, scaled to any battery size. Enter CIPA Rated Shots, Original Battery Capacity, New Battery Capacity (blank = same) to get an instant, accurate result.

Formula

Average consumption per shot = original battery capacity (mAh) / CIPA-rated shot count. Estimated shots on a different battery = CIPA-rated shots × (new battery capacity / original battery capacity). There is no universal physics formula for battery life — this scales the camera manufacturer's published CIPA standard test rating linearly by battery capacity.

Step-by-step

  1. Enter the CIPA Rated Shots.
  2. Enter the Original Battery Capacity.
  3. Enter the New Battery Capacity (blank = same).
  4. Click Calculate to see your result instantly.

Real-world example

Example: With CIPA Rated Shots = 300, Original Battery Capacity = 1200 mAh, the Battery Life Calculator gives Avg Mah Per Shot: 4, Estimated Shots: 300.

Frequently Asked Questions

What is a CIPA rating?
A standardized shot-count test defined by the Camera & Imaging Products Association, used by manufacturers so battery life can be compared consistently across cameras under a defined shooting pattern (including flash use, zoom, and review time).
Why might my real-world shot count differ from the estimate?
CIPA testing follows a fixed, moderate usage pattern — heavy use of live view, video, Wi-Fi, or cold weather will reduce real-world shots per charge below the rated and scaled estimate.
What inputs does the Battery Life Calculator need?
You'll need to provide: CIPA Rated Shots, Original Battery Capacity, New Battery Capacity (blank = same). 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 Battery Life Calculator?
The Battery Life Calculator applies the formula exactly as calculated — Average consumption per shot = original battery capacity (mAh) / CIPA-rated shot count. Estimated shots on a different battery = CIPA-rated shots × (new battery capacity / original battery capacity). There is no universal physics formula for battery life — this scales the camera manufacturer's published CIPA standard test rating linearly by battery capacity. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Battery Life Calculator free to use?
Yes, the Battery Life Calculator is completely free, requires no signup, and runs instantly in your browser.

About the Battery Life Calculator

The Battery Life Calculator uses a real, verifiable formula — Average consumption per shot = original battery capacity (mAh) / CIPA-rated shot count. Estimated shots on a different battery = CIPA-rated shots × (new battery capacity / original battery capacity). There is no universal physics formula for battery life — this scales the camera manufacturer's published CIPA standard test rating linearly by battery capacity. — so results are accurate every time, not an approximation.