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Ad Spend
Forecaster.

Stop guessing your budget. Work backward from your Revenue Goal to find your exact required ad spend. Custom models for both E-Commerce and Lead Gen.

100% Free ForeverNo Signup / No LoginD2C & B2B ModesBreak-Even MathWhitelabel Available

E-Commerce Metrics

Work backwards from your goal

₹
₹
₹

Break-Even ROAS

2.50x

Minimum return needed to cover COGS & ad spend.

Required Ad Spend

₹2.00L to ₹2.67L

Targeting 3.8x to 5.0x ROAS to hit your ₹10.00L goal.

Profit Margin

40.0%

Units Needed

500

Daily Budget (Low)

₹6.7K

Daily Budget (High)

₹8.9K

Embed This Tool

Add this professional Ad Spend Forecaster to your agency website or blog. 100% free. No API keys required.

<iframe src="https://studiohappens.tech/embed/roi-calculator"...

How to Use the Ad Spend Forecaster

1

Select Your Business Model

Choose 'Product (D2C)' if you run an e-commerce brand. Choose 'Service (B2B)' if you generate leads and close them via a sales team.

2

Set Your Revenue Goal

Input the exact amount of revenue you want to generate this month. We work backward from this number.

3

Input Your Margins or Close Rates

For D2C: Input your product price and profit per sale. For B2B: Input your deal size, cost-per-lead, and historical close rate.

4

Analyze Your Required Spend

The forecaster calculates the exact Ad Spend Range you need to hit your goal. It includes realistic buffers (+20% learning phase cushions for B2B) and highlights your True Break-Even ROAS.

5

Enable Advanced Mode (Optional)

Click the toggle in the top right to map out your full funnel. Input your CPC, Conversion Rates, Agency Fees, and Customer Lifetime Value (LTV) for a complete P&L breakdown.

Why Use This Free Forecasting Tool?

Goal-Oriented Logic

Standard calculators ask: 'I have $5,000, what will it get me?'. Our tool asks: 'I need to hit $50,000 in revenue, how much do I need to spend?'. This is how actual CFOs plan budgets.

Model-Specific Math

E-commerce brands care about Profit Margins and ROAS. Service businesses care about Close Rates and CAC. We built distinct calculators for both realities.

Automated Warnings

The tool acts as an automated consultant. If your CAC is too high, or your e-commerce margins are dangerously thin, the tool will trigger health warnings immediately.

Free Whitelabel Embed

Are you a marketing agency or freelancer? Add this calculator to your website for free. Embed it on your site, share it with clients, and look more professional.

Frequently Asked Questions

What is Break-Even ROAS?+
Break-Even ROAS is the Return on Ad Spend you must achieve to exactly cover your ad spend AND your product costs (COGS). If you fall below your Break-Even ROAS, your business is losing money on every sale.
Why is the B2B Service spend 'buffered'?+
When running lead generation campaigns, algorithms require a learning phase, and lead quality can vary. Our tool adds a 20-30% buffer to your base required spend to ensure you hit your targets even during volatile performance periods.
What is a good CAC %?+
CAC (Cost to Acquire a Customer) should ideally be less than 10% of your average deal size. If your CAC creeps above 25% of your deal size, your profit margins will severely compress and you risk losing money.
Can I include my Agency Fees in the calculation?+
Yes! Toggle 'Advanced Mode' to reveal inputs for your monthly Agency Retainer and Customer Lifetime Value (LTV) for a hyper-accurate P&L projection.
Can I embed this Ad Spend Forecaster on my website?+
Absolutely. Scroll to the bottom of the tool to grab the 2-line embed code. Just paste it into your HTML and the calculator renders automatically. It's free for agencies and freelancers.