Board-game resource production calculator

Calculate expected resources after supplied turns and resource variances after supplied turns with your own figures.

Your numbers

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

Use expected resources after supplied turns and resource variances after supplied turns to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Mutually exclusive turn outcomes: name, probability, then resource yields in declared label order
None,0.5,0,0 Wood,0.25,2,0 Mine,0.25,0,1
Resource labels in yield-column order, joined by |
Wood|Ore
Independent identical turns
4
Expected resources after supplied turns
Wood: 2; Ore: 1
Resource variances after supplied turns
Wood: 3; Ore: 0.75
Distinct resource-pair covariances after supplied turns
Wood/Ore: -0.5
Expected sum of resource units
3
Variance of summed resource units
2.75

Try another scenario

Mutually exclusive turn outcomes: name, probability, then resource yields in declared label order
None,0.5,0,0 Wood,0.25,2,0 Mine,0.25,0,1
Resource labels in yield-column order, joined by |
Wood|Ore
Independent identical turns
8
Expected resources after supplied turns
Wood: 4; Ore: 2
Resource variances after supplied turns
Wood: 6; Ore: 1.5
Distinct resource-pair covariances after supplied turns
Wood/Ore: -1
Expected sum of resource units
6
Variance of summed resource units
5.5
Calculation method

Calculation method

Expected resources after supplied turns

Turns×sum(outcome probability×resource yield), using exact six-decimal integer moments.

Resource variances after supplied turns

Turns×(E[y²]−E[y]²), evaluating the difference with exact integer numerators before conversion.

Distinct resource-pair covariances after supplied turns

Turns×(E[yi×yj]−E[yi]E[yj]); mutually exclusive turn outcomes may create negative covariance.

Expected sum of resource units

Sum resource means, only meaningful as a count when units are comparable.

Variance of summed resource units

Sum every covariance-matrix entry, including off-diagonal terms twice.

Symbols and units
a
Mutually exclusive turn outcomes: name, probability, then resource yields in declared label order
b
Resource labels in yield-column order, joined by |
c
Independent identical turns

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

Calculation steps and notation

sum(list) adds all entries in the list.

Assumptions & limits

Assumptions & limits

  • A supplied finite mutually exclusive resource-outcome model repeated independently across turns. Probabilities and yields use at most six decimal places. Covariance is retained; no actual board layout, player strategy or resource prices are inferred.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

OpenStax: finite probability and sampling without replacement; rules are explicit in each worksheet ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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