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Cash Register Float Calculator

Work out cash register float instantly with clear inputs, formula shown and shareable results.

About Cash Register Float Calculator

A till float must cover the change given out between cash collections, with a buffer for denomination mismatch. Sizing it from cash transaction rate and average change given avoids both the risk of running out of small notes and the security exposure of an oversized float.

Formulas

Change requirement

Change = Transactions per hour x Cash share x Hours between collections x Average change given

Recommended float

Float = Change requirement x 1.25, rounded up

Worked example

With the default values below, Cash Register Float Calculator returns Recommended opening float of $7,100.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Transactions per hour
42
Share paid in cash
28
Average change given per cash transaction
120
Hours between cash collections
4

Results

Recommended opening float
$7,100.00
Change required between collections
$5,644.80
Cash transactions per hour
11.8
Buffer above the calculated requirement
$1,455.20

Step by step

  1. 1Values used
  2. 2Change requirement
  3. 3Recommended float
  4. 4Recommended opening float= 7,100.00
  5. 5Change required between collections= 5,644.80
  6. 6Cash transactions per hour= 11.8
  7. 7Buffer above the calculated requirement= 1,455.20

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why a 25% buffer?

Because change demand is uneven by denomination. A float that is adequate in total can still run out of a particular coin or note.

Should the float vary by day?

Yes. Weekend and payday trading has both higher volume and a different cash share, so a single fixed float is either wasteful or inadequate.

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