Ad Budget Allocation Calculator
Split budget across channels by efficiency.
Enter your values
Enter the monthly budget in $.
Enter the search roas you are working with.
Enter the social roas you are working with.
Enter the display roas you are working with.
Enter the email roas you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Best channel
- Projected revenue
- $111,512.20
- Blended ROAS
- 5.58×
- Budget allocated
- $20,000.00
| Channel | Share | Budget | Revenue |
|---|---|---|---|
| Search | 25.6% | $5,121.95 | $21,512.20 |
| Social | 17.1% | $3,414.63 | $9,560.98 |
| Display | 8.5% | $1,707.32 | $2,390.24 |
| 48.8% | $9,756.10 | $78,048.78 |
Quick answer
Efficient allocation puts more budget into channels with higher proven ROAS.
Channel share = ROAS ÷ ΣROAS
At a glance
| What it does | Split budget across channels by efficiency. |
|---|---|
| Category | Business |
| Inputs needed | Monthly budget, Search ROAS, Social ROAS, Display ROAS, Email ROAS |
| Main output | Best channel |
| Formula | Channel share = ROAS ÷ ΣROAS |
| Cost | Free — no sign-up, no download |
How to use the Ad Budget Allocation Calculator
- 1Enter your total monthly ad budget.
- 2Enter measured ROAS for each channel.
- 3Reallocate towards the strongest performers.
Inputs explained
- Monthly budget($)
- Enter the monthly budget in $.
- Search ROAS
- Enter the search roas you are working with.
- Social ROAS
- Enter the social roas you are working with.
- Display ROAS
- Enter the display roas you are working with.
- Email ROAS
- Enter the email roas you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Monthly budget20000 $
- Search ROAS4.2
- Social ROAS2.8
- Display ROAS1.4
- Email ROAS8
Results
- Best channelEmail
- Projected revenue$111,512.20
- Blended ROAS5.58×
- Budget allocated$20,000.00
Frequently asked questions
Should I put everything in the best channel?
No — channels saturate, so weighted allocation beats all-in.
How often should I rebalance?
Monthly, using at least 30 days of data.
What do I need to enter into the Ad Budget Allocation Calculator?
Just 5 values: monthly budget, search roas, social roas, display roas, email roas. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Ad Budget Allocation Calculator work out the answer?
Efficient allocation puts more budget into channels with higher proven ROAS. It applies the formula Channel share = ROAS ÷ ΣROAS and shows the working so you can check each step by hand.
Is the Ad Budget Allocation Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.