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Free calculator

Google Ads Budget Calculator: plan your spend from your goal

Type how many leads or sales you want each month. See how many clicks you need, what they cost and what each lead costs you. Free, no sign-up, and it all runs in your browser.

Your numbers
Currency
Labels only, no conversion. Type every amount in the currency you pick.
My goal is
Leads are calls, form fills or WhatsApp chats. Pick Sales for an online shop.
per month
Example value. Change it to your own goal.
BDT
From Keyword Planner or your account.
%
Share of clicks that become a lead.
%
Share of leads that buy.
BDT
What one sale is worth.
Your estimate
Estimated monthly ad budget--
Clicks needed-
Cost per lead-
Sales from these leads-
Cost per sale-
Revenue (estimate)-
ROAS-

Example values are filled in. Every result is an estimate. Real CPC and conversion rates move every day, so test and update.

How it works

From your goal back to a budget

Most people pick a budget and hope. This works the other way round.

1

Leads to clicks

Divide the leads you want by your conversion rate. 40 leads at 5% means 800 clicks.

Clicks = leads ÷ rate
2

Clicks to budget

Multiply the clicks by your average cost per click. That is your monthly ad spend.

Budget = clicks × CPC
3

Budget to cost per lead

Divide the budget by your leads. This is the number to watch every week.

CPL = budget ÷ leads
4

Leads to revenue

Leads times close rate gives sales. Sales times job value gives revenue. Revenue ÷ budget is ROAS.

ROAS = revenue ÷ budget

How to use the numbers

Compare cost per lead with customer value

If one customer is worth BDT 15,000 and you close 1 lead in 4, you can pay far more than BDT 600 a lead and still win.

Fix the page before buying more clicks

Double your conversion rate and your cost per lead halves. A faster, clearer landing page is often cheaper than more budget.

Put real data back in

After two to four weeks, swap the example CPC and conversion rate for the real ones from your account. Then plan again.

Track every lead first

The maths only works if calls, forms and WhatsApp clicks are tracked as conversions in Google Ads.

Worked example

A clinic that wants 40 enquiries a month

A dental clinic in Dhanmondi wants 40 new patient enquiries a month from Google Search. These are example numbers, not real clinic data.

  1. 1Goal 40 leads. Average CPC BDT 30. Conversion rate 5%.
  2. 2Clicks needed: 40 ÷ 5% = 800 clicks.
  3. 3Monthly budget: 800 × BDT 30 = BDT 24,000. That is about BDT 789 a day.
  4. 4Cost per lead: 24,000 ÷ 40 = BDT 600.
  5. 5The clinic closes 25% of leads, so 10 new patients. Cost per patient: BDT 2,400.
  6. 6Each patient is worth BDT 15,000 on average, so revenue is BDT 1,50,000. ROAS: 1,50,000 ÷ 24,000 = 6.25.

Your CPC and conversion rate decide everything. Try a low and a high value for each to see your real range.

Go further

Read and get help

ServiceGoogle Ads management

I plan, build and run Search, Shopping and Performance Max campaigns myself.

ServiceTracking and analytics

GA4, Enhanced Conversions and server-side tracking, so every lead is counted.

GuideGoogle Ads cost in Bangladesh

CPC ranges, a budget sum you can do on paper, and the fees to watch.

GuideDigital marketing mistakes to avoid

The ad and tracking mistakes I see most often in Bangladeshi businesses.

Questions

About the google ads budget calculator

How much should I spend on Google Ads per month?
Work it out from your goal: leads needed ÷ conversion rate × cost per click. That ties the budget to results instead of a guess. Many small businesses in Bangladesh start with roughly BDT 15,000 to 50,000 a month in ad spend. Then they adjust after a few weeks of real data.
How do I find my average cost per click?
Open Google Keyword Planner inside your Google Ads account. Look at the top of page bid range for your keywords and use the middle. Once your ads run, use the real Avg. CPC column instead.
What conversion rate should I use?
Use your own account data if you have it. It depends on your offer, your page and your market, so any average from another business can mislead you. If you are new, try a low, a middle and a high value to see the range of budgets.
What is ROAS in Google Ads?
ROAS means return on ad spend. It is revenue from ads divided by ad spend. A ROAS of 4 means 4 in revenue for every 1 spent. Revenue is not profit, so also check your break-even ROAS.
Does the budget include VAT or management fees?
No. It shows ad spend only. Card payments from Bangladesh can carry VAT and bank charges, so check your card statement. A freelancer or agency fee is also separate.
Why is my real cost per lead different from the estimate?
CPC changes with competition, time of day and ad quality. Conversion rate changes with your page and your offer. Treat the result as a plan, then put your real numbers back in after two weeks.
Can I plan for online sales instead of leads?
Yes. Switch the goal to Sales. The conversion rate then means clicks that turn into a sale, and the calculator shows cost per sale and ROAS directly.

Want a Google Ads plan built on your real numbers?

Book a free 15-minute call. I look at your keywords and your landing page before we talk. You leave with a budget you can trust.

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