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Cash Conversion Cycle Calculator

Fast-growing brands run out of cash, not demand. The gap between paying for stock and collecting from customers is your cash conversion cycle, and it quietly sets a ceiling on how fast you can grow without outside funding. This free calculator turns your DIO, DSO and DPO into that cycle, the working capital it ties up, and the growth rate your margin can actually self-fund.

Enter your numbers below, or start with the example data. How it works ↓

The cash cycle

Cash & profitability

Modelled estimates only, not financial advice. The growth ceiling is a theoretical self-funded limit; confirm against your real cash flow before planning around it.

Why cash, not sales, is what caps your growth

A brand can have queues of demand and still stall, because growth is funded before it is paid for. You buy the stock, you pay to acquire the customer, and only later does the cash come back. The length of that wait is your cash conversion cycle, and it decides how much money you need standing behind every extra order. Ignore it and you scale straight into a cash-flow wall with a full order book.

This tool makes the cycle visible, shows the working capital it locks up, and estimates the growth rate your own margin can sustain without raising money.

How the calculator works

The cycle is three timings netted against each other:

CCC = DIO + DSO − DPO
max growth = (1 + net margin)^(365 ÷ CCC) − 1
  • Days inventory outstanding (DIO): how long a unit sits as stock before it sells. Usually the biggest number, and the most controllable.
  • Days sales outstanding (DSO): how long customers take to pay. Low for card-paid DTC, high for wholesale on invoice.
  • Days payables outstanding (DPO): how long you take to pay suppliers. Longer terms shrink the cycle, because they push your cash outflow later.

The growth formula treats each turn of the cycle as one compounding round: the more times a year your cash comes back (a shorter CCC) and the more profit it carries each time (a higher net margin), the faster you can self-fund growth.

Reading the heatmap

The grid plots the growth ceiling for every combination of cycle length and net margin, with your current position highlighted. Move up the grid (a shorter cycle) or right (a higher margin) and watch the ceiling climb. It makes the trade-off concrete: whether it is easier for your business to shave 20 days off the cycle or add two points of margin, and which one buys more growth.

Negative cycles remove the constraint. If you collect from customers before you pay suppliers, your cycle goes negative and working capital stops holding you back. The tool shows the ceiling as unconstrained, because at that point growth is limited by demand and operations, not by the cash gap.

Assumptions and limitations

  • A theoretical ceiling, not a forecast. The growth number is the rate your margin could compound at if every dollar of profit were reinvested cleanly. Real growth is lumpier and depends on demand, execution and seasonality.
  • Blended, single-product view. A brand with very different products (fast heroes and slow movers) has a blended cycle that can hide the extremes. Segment big differences separately.
  • Cash burn is an average. The working capital figure uses a steady daily outflow. Sharp seasonality or a big stock buy will spike the real requirement above it.

Use the cycle as the reality check on every growth plan, then confirm it against your real cash flow. If you want help turning a tight cash cycle into a scaling plan, integrated digital strategy is what we do.

Frequently Asked Questions

The cash conversion cycle is the number of days your money is tied up in operations between paying for stock and collecting cash from customers. It is calculated as days inventory outstanding (how long stock sits) plus days sales outstanding (how long customers take to pay) minus days payables outstanding (how long you take to pay suppliers). A shorter cycle means cash comes back faster and can be redeployed into growth sooner.

Growth eats cash. Every extra order you want to fund needs stock bought and paid for before the customer's cash arrives, and the size of that gap is your CCC. For a given net margin, a shorter cycle lets each dollar of profit turn over more times a year, so it compounds faster. The tool models that ceiling with the formula max growth equals (1 plus net margin) to the power of 365 divided by CCC, minus one. It is a theoretical self-funded limit, not a promise, but it shows where working capital, not demand, becomes the brake.

A negative cycle means you collect cash from customers before you have to pay your suppliers, so your suppliers are effectively funding your growth. This is the Walmart and Costco model, and it is achievable in ecommerce with long supplier payment terms and fast, card-paid checkout. When your CCC is negative, working capital stops being the ceiling on growth, which is why the tool shows the growth limit as unconstrained.

For most ecommerce brands, days inventory outstanding is the biggest and most controllable number, so it is usually where the fastest wins are: sell through faster, hold less slow-moving stock, and tighten reorder timing. DSO is often already low if customers pay by card at checkout. Extending DPO by negotiating longer supplier terms works because it directly shrinks the cycle without touching sales, though it depends on supplier goodwill. The heatmap lets you test each change and see the effect on your growth ceiling.

Use your total average daily cash outflow across everything it takes to operate: inventory purchases, operating expenses, and marketing. Take a typical month, add those outflows, and divide by 30. The tool multiplies it by your cycle length to estimate the cash float locked inside the CCC gap at any moment, which is the working capital a lender or your own reserves need to cover.

No. The calculator runs entirely in your browser and nothing you enter is sent to a server. Inputs are saved in your browser's local storage so they survive a refresh, and the "copy shareable link" button encodes them in the URL only when you choose to share it.

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