Subscription service credit arithmetic calculator

Calculate gross eligible credit and additional credit due with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Choose the currency for these amounts. Changing it keeps your numbers and does not convert exchange rates.

Use gross eligible credit and additional credit due to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Measured outage duration (minutes)
90
Supplied credit eligibility threshold (minutes)
60
Period service charge (USD)
500
Supplied eligible credit fraction (0–1)
0.1
Already issued credit (USD)
10
Gross eligible credit (USD)
$50.00
Additional credit due (USD)
$40.00

Try another scenario

Measured outage duration (minutes)
30
Supplied credit eligibility threshold (minutes)
60
Period service charge (USD)
500
Supplied eligible credit fraction (0–1)
0.1
Already issued credit (USD)
10
Gross eligible credit (USD)
$0.00
Additional credit due (USD)
$0.00
Calculation method

Calculation method

Gross eligible credit (USD)

c*d if a>=b else 0

Additional credit due (USD)

max(0,(c*d if a>=b else 0)-e)

Symbols and units
a
Measured outage duration (minutes)
b
Supplied credit eligibility threshold (minutes)
c
Period service charge (USD)
d
Supplied eligible credit fraction (0–1)
e
Already issued credit (USD)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • One user-defined threshold and percentage credit; durations must already exclude contract-ineligible outages. Fraction ≤1; no SLA guarantee. Supported limits: All numeric inputs must be finite. Only the explicitly described mathematical scenario is supported.
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