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Second Hand Value Calculator

Work out second hand value instantly with clear inputs, formula shown and shareable results.

About Second Hand Value Calculator

Value depreciates geometrically at the annual rate, then a condition multiplier is applied to the resulting book value. Geometric depreciation means the first year loses the most in absolute terms, which is why buying one year old is usually the value sweet spot.

Formulas

Book value

book = original price x (1 - annual depreciation) ^ age in years

Adjusted value

value = book value x condition multiplier

Worked example

With the default values below, Second Hand Value Calculator returns Estimated resale value of $337.50. Change any input above and every figure here is recalculated in your browser.

Inputs used

Original priceminimum 0.01
800
Ageminimum 0.01 years
3 years
Annual depreciationaccepts 0.1–90 %
25 %
Conditionone of As new (110% of book value), Good (100%), Fair (80%), Poor (55%)
Good (100%)

Results

Estimated resale value
$337.50
Value before the condition adjustment
$337.50
Share of the original price retained
42.19%
Average value lost per year
$154.17

Step by step

  1. 1Values used
  2. 2Book value
  3. 3Adjusted value
  4. 4Estimated resale value= 337.50
  5. 5Value before the condition adjustment= 337.50
  6. 6Share of the original price retained= 42.19
  7. 7Average value lost per year= 154.17

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or fees or charges into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Second Hand Value figure worked out?

book = original price x (1 - annual depreciation) ^ age in years. Value depreciates geometrically at the annual rate, then a condition multiplier is applied to the resulting book value.

Why does this matter?

Geometric depreciation means the first year loses the most in absolute terms, which is why buying one year old is usually the value sweet spot.

What do I need to enter?

Enter original price, age, annual depreciation, condition. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.

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