Stamp Collection Value Calculator

Work out stamp collection value instantly with clear inputs, formula shown and shareable results.

About Stamp Collection Value Calculator

Catalogue total is stamps times the average catalogue value, and market value applies a realisation percentage that reflects what collections actually sell for. Common material typically realises 10 to 25 percent of catalogue, so a large accumulation is worth far less than its catalogue total suggests.

Formula

Market value

market = stamps x average catalogue value x realisation percentage

Worked example

With the default values below, Stamp Collection Value Calculator returns Realistic market value of $600.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Number of stampsminimum 1: 1,200
Average catalogue value per stampminimum 0.001: 2.5
Typical realisation against catalogueaccepts 0.1–200 %: 20 %

Results

Realistic market value: $600.00
Total catalogue value: $3,000.00
Market value per stamp: $0.5000
Discount to catalogue: 80.00%

Step by step

1Values used
2Market value
3Realistic market value= 600.00
4Total catalogue value= 3,000.00
5Market value per stamp= 0.5000
6Discount to catalogue= 80.00

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 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 Stamp Collection Value figure worked out?

market = stamps x average catalogue value x realisation percentage. Catalogue total is stamps times the average catalogue value, and market value applies a realisation percentage that reflects what collections actually sell for.

Why does this matter?

Common material typically realises 10 to 25 percent of catalogue, so a large accumulation is worth far less than its catalogue total suggests.

What do I need to enter?

Enter number of stamps, average catalogue value per stamp, typical realisation against catalogue. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.