Ecommerce
Solve in either direction: the budget a revenue target needs at your ROAS, or the revenue a budget should return.
Direction
The figures
In your local currency. Used in mode 1.
In your local currency. Used in mode 2.
Revenue earned per 1 unit of ad spend.
Required ad spend
12,500
Budget needed to hit the target at this ROAS.
Formula verified 13 September 2026
Implied revenue
50,000
Revenue this plan targets or projects.
Spend as % of revenue
25.00%
How much of revenue goes to ads.
Estimate only — platform fees and costs vary; verify current rates. Read the full disclaimer ↓
How the budget, the revenue it targets, and the implied return relate at your chosen mode and ROAS. The marginal-ROAS rows stress-test the plan: if real ROAS lands below target, the same budget returns less, so plan with a conservative figure.
| Line | Amount | How it is derived |
|---|---|---|
| Ad spend (budget) | 12500.00 | Target revenue ÷ target ROAS |
| Target ROAS | 4.00x | Revenue earned per unit of ad spend |
| Implied revenue | 50000.00 | Entered directly |
| Spend as % of revenue | 25.00% | Ad spend ÷ revenue |
| Revenue if ROAS = 3.0x | 37500.00 | Same budget, one point lower ROAS |
| Revenue if ROAS = 5.0x | 62500.00 | Same budget, one point higher ROAS |
Estimates only — not financial, tax, or professional advice.
100% private — every number you enter is calculated in your browser and never sent to our servers.
What it calculates: Required ad spend, Implied revenue, Spend as % of revenue.
Updated 5 June 2026 · Transparent assumptions
Planning a quarter starts from a revenue number and asks what it costs to reach: spend is the target divided by the ROAS you can sustain. Forecasting starts from an approved budget and asks what it should deliver: revenue is spend multiplied by ROAS.
They are the same relationship read in opposite directions, and confusing them is how budgets get set against targets nobody checked were affordable at the margin the business actually runs.
A ROAS of 4 is 25% of revenue spent on advertising; a ROAS of 2 is 50%. The percentage form is the one that makes a plan obviously viable or obviously not, because it can be compared directly against gross margin.
If the implied marketing share exceeds your contribution margin, the plan loses money at every level of success. That check takes seconds and prevents the most expensive category of planning error.
The arithmetic is linear; ad platforms are not. Doubling spend rarely doubles revenue, because the cheapest and most responsive audiences are reached first and each additional unit of budget buys progressively less responsive attention.
So a doubled budget planned at today’s ROAS will very likely miss. Use a lower ROAS assumption for the incremental portion, or plan the increase in steps and re-measure at each one rather than committing the whole rise at once.
For anything with a considered purchase cycle, this month’s spend produces some of next month’s revenue. Dividing one month’s revenue by the same month’s spend understates efficiency while scaling up and flatters it while scaling down.
Where the lag is material, compare a trailing revenue window against the spend that preceded it, and treat any single month’s ratio as noise rather than as a signal to act on.
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
Business disclaimer
Results are estimates for planning and analysis based on the figures you enter. They are not accounting, tax, or financial advice — verify with your own records and a qualified professional before making decisions.
How we calculate · Found an error? email us
Published 13 September 2026