Free marketing ROI & ROAS calculator
This free tool — built by a Singapore digital marketing agency — turns your spend and revenue into the four numbers that actually decide whether a campaign is working: ROAS, marketing ROI, cost per acquisition and, if you add your margin, your true gross profit and break-even ROAS. It runs entirely in your browser, and it’s currency-agnostic — enter figures in SGD or any currency.
ROAS vs ROI — what’s the difference?
ROAS (return on ad spend) is revenue divided by spend, expressed as a multiple — a 5x ROAS means every dollar of spend returned five dollars of revenue. Marketing ROI is the profit relative to spend, expressed as a percentage. ROAS is the quick campaign-health metric; ROI (especially margin-adjusted) tells you whether you actually made money. A campaign can post a healthy ROAS and still lose money if the margin is thin — which is exactly why the break-even ROAS figure matters.
Why break-even ROAS is the number most marketers miss
Break-even ROAS is simply 1 ÷ gross margin. If your gross margin is 50%, you need a 2.0x ROAS just to cover the product cost and the ad spend; at 25% margin you need 4.0x. Any ROAS above break-even is profit; below it, you’re paying to lose money. Knowing your break-even ROAS turns “is 4x good?” from a guess into a decision — and it’s the single most useful figure to set targets and bids against.
Benchmarks and context for Singapore businesses
“Good” ROAS varies enormously by industry, margin and funnel stage — a high-margin SaaS business and a low-margin retailer should chase very different targets. Rather than anchor on a generic benchmark, calculate your own break-even ROAS from your margin, then aim comfortably above it. Also remember that ROAS on paid channels ignores the compounding value of organic SEO and AI-search visibility, which keep returning long after the ad spend stops.
How to use these numbers to actually change your spend
A calculator only earns its keep when the output changes a decision. Once you have your ROAS, CPA and break-even ROAS, work top-down: any campaign sitting below its break-even ROAS is losing money on every sale and should be paused or restructured before you touch anything else. Campaigns comfortably above break-even are your scaling candidates — but only if the CPA still leaves room as you push volume, because cost-per-acquisition almost always rises when you widen targeting or raise bids. A useful discipline is to re-run the figures monthly with your actual blended margin rather than a headline revenue number, so a burst of discounted sales doesn’t flatter a channel that’s quietly unprofitable.
Treat the calculator as the first step in a feedback loop, not a verdict. Feed the CPA back into your channel planning, and pair it with a realistic customer lifetime value if you sell repeat purchases or subscriptions — a 2.0 ROAS on a first order can be excellent if a customer typically buys four more times. If you’re unsure how to fold lifetime value and margin into a paid-media plan, our Google Ads services team builds these targets into every account we manage.
Common mistakes that make ROAS lie to you
The most frequent error is mixing time frames: comparing this month’s ad spend against revenue that includes conversions driven by last month’s campaigns. Attribution windows matter, so keep spend and revenue aligned to the same period and the same conversion action. The second trap is counting only platform-reported revenue — the figure inside Meta or Google Ads — which double-counts across channels and ignores refunds, chargebacks and cancelled orders. Where possible, reconcile against revenue in your actual sales or accounting system.
Finally, watch for marginal versus average ROAS. Your account might report a healthy 4.0 overall, but the last dollar you added could be converting at 1.5. Averages hide the point at which extra spend stops paying for itself, which is exactly the point that decides whether you scale or hold. When you need a fuller picture across SEO, paid and organic together, a digital marketing services review can map where each dollar is genuinely working.
Frequently asked questions
What is a good ROAS?
It depends on your margin. Calculate your break-even ROAS (1 ÷ gross margin) and treat anything comfortably above it as good. A 4x ROAS is excellent at 25% margin (break-even) versus merely fine at 60% margin.
Should I include my product/service costs in ROAS?
Standard ROAS is just revenue ÷ ad spend and ignores product cost. That’s why this tool also shows margin-adjusted gross profit and break-even ROAS — so you see whether the campaign is actually profitable, not just high-revenue.
How is marketing ROI different from ROAS?
ROAS is a revenue multiple (5x); marketing ROI is a profit percentage ((revenue − spend) ÷ spend). ROI is the truer measure of whether the marketing paid off, especially once you factor in margin.
Does this include the value of SEO and organic traffic?
No — this calculates the ROI of a specific spend and its revenue. Organic SEO and AI-search visibility compound over time and aren’t captured in a single ROAS figure, which is one reason they often deliver the best long-run marketing ROI of all.
What’s the difference between blended ROAS and channel ROAS?
Channel ROAS measures the return on a single platform in isolation — useful for optimising that account. Blended ROAS divides your total revenue by your total marketing spend across every channel, including SEO, email and referrals. Blended is the truer measure of business health because it isn’t distorted by platforms each claiming credit for the same sale. Use channel ROAS to optimise, blended ROAS to judge.
How do I factor GST into these calculations?
Use figures that are consistent with each other. If your revenue is recorded GST-inclusive, keep costs on the same basis; if you report revenue net of GST, strip the tax from both sides. For most Singapore businesses the cleanest approach is to run ROAS and margin on GST-exclusive numbers, since the tax is a pass-through you remit to IRAS rather than profit you keep. The key is never to mix an inclusive revenue figure with an exclusive cost figure.
