Free UK Marketing & SEO Calculators 2026
ROAS, CAC, LTV, PPC budget planning, SEO traffic value, A/B test sample sizes and more — built for UK marketers, growth teams and agency account managers. Free to use, no account needed.
ROAS Calculator
Calculate return on ad spend and break-even ROAS for Google Ads, Meta or any paid channel.
Customer Acquisition Cost (CAC) Calculator
Calculate CAC by channel and compare against customer lifetime value.
Google Ads / PPC Budget Planner
Work backwards from lead targets to required ad budget — by sector CPC benchmark.
LTV:CAC Ratio + Payback Calculator
Calculate LTV:CAC ratio and payback period — the core SaaS and growth marketing metrics.
Conversion Rate Impact Calculator
Model the revenue impact of improving your conversion rate by 0.5%, 1% or 2%.
A/B Test Sample Size Calculator
Calculate statistical significance and required sample size for valid A/B tests.
SEO Traffic Value Calculator
Estimate the equivalent PPC cost of your organic search traffic — using keyword CPC data.
Email List Value Calculator
Estimate the revenue value of your email list based on list size, open rate and conversion.
Meta (Facebook/Instagram) Ad Budget Planner
Plan your Facebook/Instagram ad budget based on CPM, CTR, CPC and conversion rate.
Influencer Campaign ROI Calculator
Calculate estimated reach, CPM, engagement cost and ROI for influencer marketing campaigns.
UK Marketing Benchmarks 2025/26
UK marketing budgets in 2025 are increasingly scrutinised for performance against measurable KPIs. Digital channels — Google Search, Meta, SEO and email — remain the core acquisition mix for most UK SMEs. Key benchmarks: Google Search ROAS 4–8×; Meta ROAS 2–4×; LTV:CAC ratio 3× or above for SaaS; email revenue-per-subscriber £0.50–£2.00 per month for engaged B2C lists. These calculators help marketing teams and agency account managers build business cases, set budgets and report performance in financial terms that finance teams understand.
Frequently Asked Questions
- What is a good ROAS for Google Ads in the UK?
- 4–8× ROAS is typical for Google Search campaigns in the UK. E-commerce businesses often target a minimum of 4× ROAS to cover cost of goods and overheads. Service businesses with higher margins may accept 2–3× ROAS. Break-even ROAS depends entirely on your gross margin: break-even ROAS = 1 ÷ gross margin %. Always calculate POAS (Profit on Ad Spend) alongside ROAS for a true picture of profitability.
- What is a typical CPC for UK businesses on Google Ads?
- UK CPC benchmarks vary widely by sector. Common ranges in 2025: plumbers £2–5, electricians £2–4, dentists £3–8, accountants £4–10, solicitors £8–25, mortgage brokers £5–15, business insurance £15–40. Use Google Keyword Planner for exact keyword-level CPC data. CPCs tend to be higher in Q4 due to competition and lower in Q1–Q2.
- How do I calculate LTV:CAC ratio?
- LTV:CAC = Customer Lifetime Value ÷ Customer Acquisition Cost. LTV = ARPU × Gross Margin % ÷ Monthly Churn Rate. For example: ARPU £100/month, gross margin 70%, monthly churn 2% gives LTV = £100 × 0.70 ÷ 0.02 = £3,500. If CAC is £700, LTV:CAC = 5×. A ratio of 3× or higher is generally considered healthy for SaaS businesses.
- How long should an A/B test run before checking results?
- At minimum one full business week to capture weekly traffic patterns — ideally 2–4 weeks for reliable results. Use a sample size calculator to determine the minimum number of visitors needed based on your baseline conversion rate, minimum detectable effect (MDE) and confidence level. Peeking at results before reaching the required sample size inflates the false positive rate (p-hacking). Always run tests for complete business cycles.