Stamp Collection Value Calculator

Estimate stamp collection value based on Scott catalog pricing, condition grade, gum status, and age premiums.

Scott catalog value ($)

Condition grade (10-100)

Number of stamps

Gum condition (0-3)

Certificate (0=No, 1=Yes)

Age bracket (0-3)

Tab to move between fields

Value per stamp ($)

$37.50

≈ 8 cups of coffee

Total collection value ($)$37.50

Condition multiplier0.75

Dealer buy price ($)$18.75

Auction estimate ($)$28.13

How to Use This Calculator

Enter Scott catalog value and condition grade (10–100).
Set number of stamps, gum condition (no gum, hinged, never hinged, or used), certificate status, and age bracket.
Review Value per Stamp, Total Collection Value, Condition Multiplier, and Dealer Buy Price.

How the result changes with Condition grade (10-100)

Scott catalog value ($): Published Scott catalog value for the stamp.
Condition grade (10-100): Condition score from 10 (Poor) to 100 (Superb).
Number of stamps: Number of stamps at this value/condition level.
Gum condition (0-3): 0=No gum, 1=Hinged, 2=Never hinged, 3=Used/canceled.
Certificate (0=No, 1=Yes): 1 if expertized with certificate of authenticity.
Age bracket (0-3): 0=Modern (<50yr), 1=Semi-modern (50-100yr), 2=Classic (100-150yr), 3=Early (150yr+).

Value per stamp ($): Estimated market value per stamp after condition and other adjustments.
Total collection value ($): Total value for all stamps at this value/condition level.
Condition multiplier: Fraction of catalog value based on the condition grade.
Dealer buy price ($): Approximate price a dealer would pay (~50% of retail).
Auction estimate ($): Estimated auction realization (~75% of retail after premiums).

Identify Input Parameters
4 parameters
Scott catalog value ($) = 50, Condition grade (10-100) = 85, Number of stamps = 1, Gum condition (0-3) = 2 = 6 input(s) provided
Calculate Value per stamp
Value per stamp = scottCatalogValue * conditionMultiplier * gumMultiplier
37.5 = $37.5
Calculate Total collection value
Total collection value = perStampValue * numStamps
37.5 = $37.5
Calculate Condition multiplier
Condition multiplier
0.75 = 0.75