Planning a Meta Ads budget usually starts as guesswork. This calculator turns it into arithmetic: enter what you plan to spend and the numbers your store already achieves, and see the purchases, cost per purchase and ROAS that budget should produce.
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How to use the Meta Ads budget calculator
- Monthly budget: what you plan to spend on Meta Ads
- CPM: your cost per 1,000 impressions. Check your Ads Manager average, and remember CPMs rise during festive season
- CTR: the share of people who click after seeing your ad
- Conversion rate: the share of visitors who buy. Take it from Shopify Analytics, not a guess
- AOV: your average order value
How to read the results
The important line is expected ROAS. Compare it with your break-even ROAS from the break-even ROAS calculator. If the forecast sits below break-even, more budget only buys more losses. Fix conversion rate, AOV or creative first.
What the numbers really mean
If cost per click is high
Usually a creative problem. Better hooks and clearer product shots lower CPC more reliably than audience changes.
If clicks are plentiful but purchases are few
The problem is after the click: the landing page, price clarity or checkout. See Meta Ads getting clicks but no sales.
If the forecast looks good but reality doesn’t match
Check tracking first. Missing Conversions API data makes results look worse than they are, and COD returns make them look better. See the RTO cost calculator.
A realistic way to plan budget
- Work out the ROAS your margins need
- Use this calculator to see what your current conversion rate and AOV can deliver
- If the maths doesn’t work, improve the store before raising spend
- Scale in steps once a campaign clears your target
Frequently asked questions
How much should a D2C brand spend on Meta Ads?
Enough to generate consistent purchase data for the algorithm to learn from, and no more than your margins can support. Use this calculator with your break-even ROAS to find a realistic starting budget.
What is a good CPM in India?
It varies by audience, category and season, and rises during festive periods. Use your own account average rather than a benchmark.
Why is my actual ROAS lower than this forecast?
Common reasons are a lower real conversion rate, creative fatigue, tracking gaps or COD returns reducing delivered revenue.
Is this calculator a guarantee?
No. It’s a forecast based on the numbers you enter. Real results depend on creative, competition, seasonality and your store.
Explore more free D2C calculators, or see our Meta Ads service.