Cash Conversion Cycle Calculator

What Is the Cash Conversion Cycle?

The cash conversion cycle measures how long it takes for a business to convert its investments in inventory and operations into cash from customers. It tracks the complete journey of a dollar — from the moment you spend it on materials or labor, through the time it sits in inventory or work in process, to when you finally collect payment from your customer.

A shorter cash conversion cycle means cash comes back faster and the business needs less working capital to sustain operations. A longer cycle means cash is tied up longer and the business must either borrow or tap reserves to bridge the gap.

The Formula

Cash Conversion Cycle = Days Sales Outstanding + Days Inventory Outstanding - Days Payable Outstanding

Each component measures a different stage of the cash cycle.

The Three Components

Days Sales Outstanding (DSO) measures how long it takes to collect payment after billing. If your DSO is 45, your customers take an average of 45 days to pay after you invoice them.

Days Inventory Outstanding (DIO) measures how long inventory or work in process sits before it is sold or billed. For service businesses with no physical inventory this number is typically zero or very small.

Days Payable Outstanding (DPO) measures how long you take to pay your suppliers. A higher DPO means you are holding onto cash longer before paying out, which reduces your working capital need.

The relationship between the three is straightforward. DSO and DIO add days to your cash cycle because they represent time when your cash is tied up. DPO subtracts days because it represents time when you are using your supplier's money instead of your own.

A Worked Example

A specialty contractor has the following financials:

  • Annual revenue: $4,800,000

  • Accounts receivable: $620,000

  • Annual COGS: $3,600,000

  • Work in process / inventory: $180,000

  • Accounts payable: $290,000

DSO = (Accounts Receivable / Annual Revenue) x 365 DSO = ($620,000 / $4,800,000) x 365 = 47.1 days

DIO = (Inventory / COGS) x 365 DIO = ($180,000 / $3,600,000) x 365 = 18.3 days

DPO = (Accounts Payable / COGS) x 365 DPO = ($290,000 / $3,600,000) x 365 = 29.4 days

Cash Conversion Cycle = 47.1 + 18.3 - 29.4 = 36.0 days

This contractor's cash is tied up for an average of 36 days between spending and collecting. On $4,800,000 in annual revenue that represents roughly $473,000 in working capital required just to sustain normal operations.

Step 1 — Days Sales Outstanding (DSO)
How long does it take to collect after billing?
Annual revenue
$
Accounts receivable
$
DSO: 47.1 days
Step 2 — Days Inventory Outstanding (DIO)
How long does inventory or work in process sit before billing?
Annual COGS
$
Inventory / work in process
$
For service and construction businesses: include work in process, costs in excess of billings, and any unbilled labor or materials. Employee costs incurred but not yet billed belong here. Pure service businesses with no unbilled work can enter 0.
DIO: 18.3 days
Step 3 — Days Payable Outstanding (DPO)
How long do you take to pay your suppliers?
Accounts payable
$
Include trade payables to suppliers and subcontractors. Employee payroll is typically paid too quickly to meaningfully offset the cycle and is not included here.
DPO: 29.4 days
DSO
47.1 days
DIO
18.3 days
DPO
29.4 days
Cash conversion cycle
36.0 days
Working capital required
$473,000
Based on $4,800,000 in annual revenue, your cash cycle ties up approximately $473,000 in working capital.

How to Improve Your Cash Conversion Cycle

There are three levers. Reduce DSO by billing faster, following up on receivables sooner, and offering early payment incentives. Reduce DIO by improving job scheduling, reducing material waste, and billing as work is completed rather than at project end. Increase DPO by negotiating better payment terms with suppliers — though be careful not to damage relationships or lose early payment discounts that exceed your cost of capital.

Even small improvements in each component compound. Reducing your CCC by 10 days on $5,000,000 in annual revenue frees up roughly $137,000 in working capital.