E/MEarnMathby Dynep
EarnMath / Calculators / Digital Product Sales Calculator
Digital product math

How many sales does your income goal require?

Work backward from monthly net income to contribution per sale, required sales, traffic and support load. Every rate is editable.

Sales → trafficNo “average creator income” data.
Your assumptions

Build the sales requirement

Defaults are illustrative only. Replace them with your own numbers.

A digital product can be highly scalable, but only after the unit economics work. This calculator separates the price you charge from the money each sale actually contributes after refunds, fees and variable costs.

The calculator is deterministic: the same inputs produce the same result. It does not use AI to invent demand, conversion rates, market prices or expected income.

What you get

  • Net contribution per sale
  • Required monthly sales
  • Traffic implied by your conversion assumption
  • Support load implied by each sale

Important limitation

The calculator does not include taxes, ad spend or your creation time unless you add them to the relevant cost inputs.

For decisions involving tax, law, regulated investments or material financial commitments, use appropriate professional advice and verified source data.

Use the result as a requirement, then attack the weakest assumption.

A sales target is only useful if the contribution per sale and traffic requirement are explicit. EarnMath first estimates expected money collected after refunds, subtracts percentage fees and variable cost, then divides your income target plus fixed monthly costs by that contribution. Required traffic is the required sales divided by the conversion rate you enter.

Core mathcontribution = price × (1 − refund rate) × (1 − fee rate) − variable costsales needed = ceil((income target + fixed monthly cost) ÷ contribution)visitors needed = ceil(sales needed ÷ conversion rate)

Illustrative example

With the built-in example assumptions—$29 price, 8% percentage fees, 5% refunds, $40 monthly fixed cost and a $2,000 monthly target—the modeled contribution is about $25.35 per sale. That requires 81 sales. At a 2% visitor-to-sale conversion rate, that implies 4,050 visitors per month. The same 81 sales require about 5,400 visitors at 1.5% conversion, or about 3,240 at 2.5%.

What should make you reject the idea?

  • If contribution per sale is near zero or negative, more traffic does not fix the economics.
  • If the traffic requirement is far beyond what you can realistically acquire without paid promotion, the plan is not passive just because the product is digital.
  • If support and maintenance hours exceed your available time, treat the business as an operating job rather than an automated asset.

The calculator deliberately does not tell you what your conversion rate “should” be. Validate that number with your own landing-page data, comparable products or a small real-world test before treating the output as a plan.