Free Google Ads budget & CPC calculator
This free tool — built by a Singapore digital marketing agency — projects what a Google Ads (or any PPC) budget will actually produce: monthly clicks, conversions, cost per conversion, revenue and estimated ROAS. Change any input and the forecast updates instantly. It’s currency-agnostic, so enter your figures in SGD or whatever you plan in.
The four inputs that drive paid-search results
- Budget sets your ceiling — how much you’ll spend per month.
- Average CPC is what each click costs; it varies hugely by industry and keyword competitiveness in Singapore.
- Conversion rate is the share of clicks that turn into a lead or sale — the biggest lever most advertisers under-optimise, driven by landing-page quality and offer.
- Average order / customer value converts conversions into revenue. For lead-gen, use the average value of a closed deal, not a raw lead.
How to improve each number
If the projected ROAS is below target, you have three levers. Lower CPC by improving Quality Score, tightening match types and cutting wasteful search terms. Raise conversion rate with faster, clearer, more relevant landing pages and stronger offers — this is usually the highest-leverage fix. And increase average order value through upsells, bundles or better lead qualification. Small gains compound: a CPC 20% lower and a conversion rate 20% higher together nearly halve your cost per conversion.
Realistic expectations for Singapore paid search
CPCs in Singapore vary from under a dollar for low-competition terms to well over $10 for competitive commercial keywords (legal, finance, B2B services). Rather than anchor on a benchmark, use this calculator with your own numbers, then set a target ROAS above your break-even ROAS. Remember paid search buys traffic only while you pay; pairing it with organic SEO builds compounding visibility that keeps returning after the ad spend stops.
Reading the calculator as a break-even model, not a promise
The most useful way to treat these numbers is as a break-even model rather than a forecast of guaranteed returns. Work backwards from the one figure you actually know — the profit on a sale — and ask what CPA you can afford before a click stops paying for itself. If a lead is worth S$400 to your business and you close one in four, your break-even CPA sits around S$100; anything the calculator shows below that is headroom, and anything above it is a signal to tighten targeting or pause a keyword. Plugging in your gross margin rather than revenue is what turns a vanity ROAS into a decision you can act on.
A common mistake is optimising the wrong lever. Halving your CPC by chasing cheap, loosely-relevant keywords usually drags your conversion rate down further than the CPC saving gains you, so blended CPA gets worse. Improving landing-page relevance and Quality Score tends to lower CPC and lift conversions at once — the compounding win. If you want that engineered properly, our Google Ads management team builds the account structure and landing pages together rather than in isolation.
Where the calculator’s assumptions break down
Every figure here assumes steady-state performance, and real accounts rarely start there. New campaigns sit in a learning phase where CPCs run hot and conversion tracking is often incomplete, so your first fortnight will look worse than the model suggests — budget for a ramp rather than judging week one against the projection. Seasonality matters too: CPCs for competitive Singapore terms like “aircon servicing” or “corporate gifts” can swing 30–50% around peak demand, so a single annual average will overstate returns in busy months and understate them in quiet ones.
The calculator also can’t see assisted conversions. Paid search frequently starts a journey that finishes through organic search, direct or a WhatsApp enquiry days later, so a last-click ROAS understates the channel’s true contribution. Tag your ads properly and view them alongside other sources — our UTM campaign URL builder makes that consistent — before you decide a campaign isn’t working.
Frequently asked questions
How much should I budget for Google Ads in Singapore?
Work backwards from goals: decide how many conversions you need, multiply by your cost per conversion (CPC ÷ conversion rate), and that’s your budget. This tool does the maths — adjust budget until the conversions and ROAS meet your target.
What’s a good conversion rate for Google Ads?
It varies by industry, but many accounts sit between 2% and 6% on search. It’s also the most improvable input — landing-page and offer improvements often lift it more than any bidding change.
Is this calculator only for Google Ads?
No — the same click, CPC, conversion-rate and value model works for Meta, LinkedIn, TikTok and any pay-per-click channel. Just enter that channel’s average CPC and conversion rate.
Does a ROAS above 1x mean I’m profitable?
Not necessarily — 1x only means revenue equals spend. To know true profit you need your margin; use our ROI & ROAS calculator for margin-adjusted profit and break-even ROAS.
What CPA should I aim for?
Aim for a target CPA comfortably below your break-even, which is your average order value multiplied by gross margin and by close rate. If a customer is worth S$1,000 in gross profit and you close one enquiry in five, you can pay up to S$200 per conversion before the campaign loses money — so a healthy target sits well under that to leave room for profit.
Why is my actual CPC higher than what I entered?
Auction CPCs move constantly with competition, ad rank and match type. Broad match and high-commercial-intent keywords cost the most, while a strong Quality Score discounts every click you win. If your live CPC consistently overshoots your estimate, that usually points to weak ad relevance or landing-page experience rather than a bidding problem.
