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Ad Budget Allocation Calculator

Work out ad budget allocation instantly with clear inputs, formula shown and shareable results.

About Ad Budget Allocation Calculator

Allocating budget in proportion to observed return per unit spent tilts spend towards efficient channels while keeping presence across the mix. It is a pragmatic middle ground between chasing the single best channel and splitting evenly.

Formula

Proportional allocation

Channel share = channel return / sum of returns; blended return = weighted average

Worked example

With the default values below, Ad Budget Allocation Calculator returns Allocation To Channel A of $944,444.44. Change any input above and every figure here is recalculated in your browser.

Inputs used

Total Budgetminimum 0
2,000,000
Return Per Unit Spent On Channel Aaccepts 0.1–50
3.4
Return Per Unit Spent On Channel Baccepts 0.1–50
2.2
Return Per Unit Spent On Channel Caccepts 0.1–50
1.6

Results

Allocation To Channel A
$944,444.44
Allocation To Channel B
$611,111.11
Allocation To Channel C
$444,444.44
Blended Return Per Unit Spent
2.6333

Step by step

  1. 1Values used
  2. 2Proportional allocation
  3. 3Allocation To Channel A= 944,444.44
  4. 4Allocation To Channel B= 611,111.11
  5. 5Allocation To Channel C= 444,444.44
  6. 6Blended Return Per Unit Spent= 2.6333

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 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

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

Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.

Frequently Asked Questions

Why not put everything in the best channel?

Because returns fall as spend rises in any channel. Concentration quickly drives the marginal return below the alternatives.

How often should the allocation be revisited?

Monthly for digital channels, since auction dynamics and creative fatigue shift efficiency quickly.

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Ad Budget Allocation Calculator | Calcrivo