Exponential Decay Table: Final value by Initial value
Reference table of final value for Exponential Decay across a range of initial value values — exact, engine-computed figures you can read off at a glance.
Exponential Decay Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Final value
598.74
- Total decrease
- 401.26
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Exponential Decay Calculator
The Exponential Decay Calculator works out your final value, along with 1 related figure in an instant. Enter initial value, decay rate per period and number of periods and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the initial value.
- Enter the decay rate per period.
- Enter the number of periods.
- Read off your final value, together with total decrease — the calculator updates automatically, with no button to press.
Formula
The Exponential Decay Calculator uses the formula:
Final value = Initial value × (1 - Decay rate per period ÷ 100)^(Number of periods)
Worked example
For example, with initial value of 1,000, decay rate per period of 5% and number of periods of 10, the final value is 598.74.
| Initial value | 1,000 |
|---|---|
| Decay rate per period | 5% |
| Number of periods | 10 |
| Final value | 598.74 |
|---|---|
| Total decrease | 401.26 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
A quantity decreasing by the same percentage each period, so it falls quickly at first and slowly later. 1000 decaying 5% for 10 periods becomes about 599.
Final = initial × (1 − rate)^periods, with the rate written as a decimal.
Radioactive decay, depreciation, drug concentration in the body and cooling all follow exponential decay.
Half-life is the time for the value to halve. A higher decay rate means a shorter half-life.
Enter the initial value. Enter the decay rate per period. Enter the number of periods. Read off your final value, together with total decrease — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Exponential Decay: Formula, Steps & Examples
Learn how to calculate Exponential Decay — the formula explained step by step, with worked examples and a free calculator to check your answer.