Facebook Ads Budget Calculator

Facebook Ads Budget Calculator

The Facebook Ads Budget Calculator estimates exactly how much you need to spend on Meta to hit your target number of sales or leads based on your historical conversion metrics.

How It Works

1. Enter your target number of leads or sales for the month.
2. Input your Average Order Value (AOV) or Lead Value.
3. Provide your historical Cost Per Click (CPC) and Landing Page Conversion Rate.
4. The calculator reverse-engineers the funnel to output your required ad budget and projected ROI.

Formula & Calculation Logic

$\text{Required Clicks} = \frac{\text{Target Sales}}{\text{Conversion Rate}}$ $\text{Required Budget} = \text{Required Clicks} \times \text{Cost Per Click (CPC)}$ $\text{Projected Revenue} = \text{Target Sales} \times \text{Average Order Value (AOV)}$ $\text{ROAS} = \frac{\text{Projected Revenue}}{\text{Required Budget}}$

Worked Example

You want 100 sales this month. Your conversion rate is 2% and your CPC is $1.50. Required Clicks =$100 / 0.02 = 5,000$clicks. Required Budget =$5,000 \times $1.50 = $7,500$. To hit your goal, you must spend$7,500 on Facebook ads.

Result Interpretation

• ROAS > 1: Your campaign is generating more revenue than ad spend.
• Budget Reality Check: If your required budget is $10,000 but you only have$2,000, you mathematically cannot hit your sales goal unless you drastically improve your Conversion Rate or lower your CPC.

FAQs

What is a good conversion rate?

A typical e-commerce landing page converts between 1.5% and 3.0%. Lead generation pages can convert anywhere from 5% to 20% depending on the offer.

Why is my actual cost different?

Facebook operates on a CPM (Cost Per 1,000 Impressions) bidding system. Your CPC will fluctuate daily based on competition, seasonality, and your ad creative's click-through rate.

Sources & Last-Reviewed Date

• Sources: Meta Ads Performance Guidelines.
• Last-Reviewed: 2026-09-03