Free · Number scale conversions

Pairs, Dozens, Scores & Gross Count Table

Express a quantity in single units and named groups, including dozens, baker’s dozens and grosses.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

1,872 individual units equal 936 pairs, 156 dozens, 144 baker’s dozens or 13 grosses. A dozen contains 12 units; a baker’s dozen contains 13.

Number of groups = individual units ÷ units per group

Worked example

Enter these known values and leave the other values blank.

Individual units
1872 units
Groups of two
936 pairs
Groups of ten
187.2 decades
Half-dozens
312 half-dozens
Dozens
156 dozens
Baker’s dozens
144 baker's dozens
Scores of twenty
93.6 scores
Grosses of 144
13 grosses
Great grosses of 1,728
1.0833 great grosses

Assumptions and limitations

  • The group sizes are exact counts: pair 2, half-dozen 6, group of ten 10, dozen 12, baker’s dozen 13, score 20, gross 144 and great gross 1,728.
  • Fractions describe equivalent group quantities; the calculator does not round up to whole packages or decide a purchase quantity.
  • Zero and signed amounts are supported for arithmetic adjustments. A negative quantity is an accounting change, not a physical collection of objects.
  • The group-of-ten field is a count scale. It does not convert calendar decades or elapsed time.

Common questions

Can I convert in the opposite direction?

Yes. Enter the known value in any editable field. The other representations update in their selected units; changing a unit preserves the physical quantity.

Should I round 1.1 dozen up to two packages?

The conversion returns the exact equivalent count. If an order must use whole dozen-sized packages, apply the supplier’s packaging rule separately.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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