Power Calculators

📉 Exponential Decay Calculator

Calculate repeated percentage decay.

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Enter details

Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

📘 About the Exponential Decay

Use for repeated proportional decrease.

🧮 Formula

Where

  • Remaining = P(1-r)^n
For standard decay use 0% to 100%.

✏️ Worked example

100 declining 5% for 10 periods

You enter
Initial Value100
Decay Rate per Period5%
Number of Periods10
You get
Remaining Value59.8737
Amount Decreased40.1263

The remaining value is about 59.8737.

Try this example →

🧭 How to use this calculator

What you enter

  • Initial Value
  • Decay Rate per Period (%)
  • Number of Periods

What you get

  • Remaining Value
  • Amount Decreased

💡 Common uses

  • School mathematics and algebra
  • Scientific calculations
  • Engineering and measurement

❓ Frequently asked questions

What is exponential decay?

It is repeated proportional decrease based on the current value.