Unused versus Used Value Ratio Comparator
Compare caller same-edition, same-currency unused/used values without treating catalogue ratios as sale prices. Caller independently verifies observations, reference edition, units and applicability; not a grading-service certificate, authentication, conservation treatment, actual market price or legal/insurance entitlement.
Description
Unused and used examples of the same stamp can have different reference values.
Unused and used examples of the same stamp can have different reference values.1
This calculator expresses a supplied unused value as a multiple of a supplied used value, keeping the comparison basis explicit.
When to use Unused versus Used Value Ratio Comparator
Use this tool when you need to summarize the supplied collecting records or matched observations. Prepare independently verified observations, reference edition/context, and matching units or currency basis.
How to use Unused versus Used Value Ratio Comparator and understand its results
- Prepare independently verified observations, reference edition/context, and matching units or currency basis.
- Enter unusedValueMinor, usedValueMinor, following the field table and calculation rules below, then run the tool.
- Read unusedToUsedRatio. For result objects, inspect the nested output fields below, including any missing evidence or selected indices.
- Correct any input issues and run again. Before using a successful result, review its units, signs, evidence coverage, and stated model or reference assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| unusedValueMinor | Unused value minor; integer minor units in the explicit currency basis. | number | Required |
| usedValueMinor | Used value minor; integer minor units in the explicit currency basis. | number | Required |
Require nonnegative safe-integer minor-unit values in one currency and a strictly positive used value. Divide unused by used; unused zero gives zero. No catalogue or market data is fetched.
ratio=unusedMinor/usedMinor Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| unusedToUsedRatio | Unused to used ratio | number |
Where monetary amounts are used, keep one explicit currency and minor-unit basis; one basis point is 0.01 percent. Monetary integers and exact products must remain in JavaScript’s safe-integer range. Rational rounding uses nearest minor unit with half ties away from zero, rather than binary floating-point rounding. An input called a reference amount does not fetch or establish an actual price.
{
"input": {
"unusedValueMinor": 1500,
"usedValueMinor": 500
},
"output": {
"unusedToUsedRatio": 3
}
}Limitations and assumptions
Observations, reference edition, and applicability are independently supplied. Arithmetic and reference summaries do not provide authentication, a certified grade, or an actual market price.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Numeric values must be finite; nonfinite numeric outputs are rejected.
Alternative or Complementary methods
For a related task, use Catalogue Value Base Lookup by Number Entry: A catalogue base value belongs to a specific edition, currency, issue, and condition convention. This lookup returns the minor-unit amount paired with an exact supplied key, without retrieving a current catalogue. For a complementary step, use Condition Multiplier Applied Valuation Calculator: A condition multiplier scales a supplied reference amount under an explicit valuation convention. This calculator applies basis points to minor units without determining condition or establishing an actual selling price.
References
Similar or alternative tools
- Catalogue Value Base Lookup by Number Entry
A catalogue base value belongs to a specific edition, currency, issue, and condition convention. This lookup returns the minor-unit amount paired with an exact supplied key, without retrieving a current catalogue.
- Condition Multiplier Applied Valuation Calculator
A condition multiplier scales a supplied reference amount under an explicit valuation convention. This calculator applies basis points to minor units without determining condition or establishing an actual selling price.