Free marketing tools Marketing and growth metrics
Calculators for the numbers that decide budgets: what a channel returns, what a customer is worth and how long it takes to earn back what you spent.
ROI, ROAS, CPM, LTV, CAC and the unit economics of growth.
Marketing ROI calculator
Return on a campaign from revenue, cost and gross margin, with profit and ROAS alongside.
- Profit-based ROI when you add a margin
- Shows ROAS from the same numbers
- Formula and worked example on the page
ROAS calculator
Return on ad spend from revenue and spend, plus the break-even ROAS for your gross margin.
- Break-even ROAS from your margin
- Says whether you are above or below it
- Formula and worked example on the page
CPM calculator
Cost per thousand impressions from spend and impressions, or solve for the budget or the impressions you can buy.
- Fill in any two of cost, impressions and CPM
- Shows which value was solved
- Formula and worked example on the page
CTR calculator
Click-through rate from clicks and impressions, or the clicks or impressions a CTR implies.
- Fill in any two of clicks, impressions and CTR
- Shows which value was solved
- Formula and worked example on the page
Ad metrics calculator
CPM, CPC, CTR, CPA and conversion rate from spend, impressions, clicks and conversions.
- Five metrics from four numbers
- Works with whatever you have
- Formulas and a channel comparison on the page
Customer lifetime value calculator
Lifetime value from monthly revenue per customer, gross margin and monthly churn, with the expected customer lifetime.
- Revenue LTV or margin LTV
- Expected lifetime in months
- Formula, assumptions and a channel example
CAC calculator
Customer acquisition cost from marketing and sales spend and the new customers they brought in.
- Blended CAC and marketing-only CAC
- Sales cost optional
- Formula and channel example on the page
Profit margin calculator
Any two of cost, price, profit and margin give the rest. Add fees and shipping for net margin, with markup alongside.
- Gross and net margin
- Margin and markup side by side
- Price from a target margin
Markup calculator
Selling price from cost and markup, or markup from cost and price, with the matching margin and a conversion table.
- Any two of cost, markup, price
- Markup needed for a target margin
- Markup ↔ margin table
Break-even calculator
Units and revenue needed to cover fixed costs, margin of safety, and the volume for a target profit, with a profit-by-volume chart.
- Break-even units and revenue
- Margin of safety
- Units for a target profit
Average order value calculator
AOV from revenue and orders, plus purchase frequency, revenue per customer, repeat purchase rate and the revenue an AOV lift adds.
- AOV and revenue per customer
- Purchase frequency and repeat rate
- What a higher AOV is worth
Cart abandonment rate calculator
Abandonment rate from carts and orders, the value of abandoned carts, and the revenue and profit a recovery rate would bring back.
- Abandonment and completion rate
- Value of abandoned carts
- Revenue at your recovery rate
CPC calculator
Cost per click from spend and clicks, or solve for the budget or the clicks it buys. Also converts CPM and CTR into CPC.
- Any two of spend, clicks and CPC
- CPC from CPM and CTR
- Formula and a channel example
CPA calculator
Cost per acquisition for a lead, sign-up or purchase, the break-even CPA from order value and margin, and the ad cost per paying customer.
- Lead, sign-up or purchase
- Break-even CPA from AOV × margin
- CPA vs CAC explained
LTV:CAC ratio calculator
Lifetime value against acquisition cost, with the months it takes to earn the CAC back and the most you can spend at a target ratio.
- LTV from ARPA, margin and churn, or enter it
- Payback months next to the ratio
- Where the 3 : 1 guideline comes from
CAC payback calculator
Months to earn back customer acquisition cost from gross profit, with optional churn and expansion and a month-by-month cohort table.
- Simple and cohort payback
- Churn and expansion per month
- Cumulative gross profit table
MRR and ARR calculator
Ending MRR and ARR from starting MRR plus new, expansion and reactivation, minus contraction and churn, with growth and MRR churn rates.
- Full MRR bridge in one form
- Annual plans normalised to monthly
- What not to count, with sources
SaaS metrics calculator
Rule of 40, net and gross revenue retention, SaaS Quick Ratio, Burn Multiple, runway and the magic number, each with its source and a plain reading.
- Six metrics in one form
- Who defined each one, with links
- Readings without invented thresholds
Engagement rate calculator
Engagement rate by followers, reach, impressions and views side by side, with each platform’s own metric definitions.
- Four formulas from one set of numbers
- Pages for Instagram, TikTok and YouTube
- Benchmarks only with a named source
Subject line tester
See where your subject and preview text get cut off in Gmail, Apple Mail and Outlook, and which spam-filter rules they trip.
- Inbox previews for 4 clients
- Public SpamAssassin rules, cited
- Preview text and sender checks
Discount calculator
Sale price, percent off, stacked discounts, buy-one-get-one, spend-and-save thresholds, and the extra sales a discount needs to keep your margin.
- Stacked discounts multiply, not add
- BOGO and spend-$X-save-$Y deals
- Margin after discount and sales lift needed
Price increase calculator
The percentage change between two prices, and how many customers you can lose after a price rise before revenue or gross profit falls.
- Break-even customer loss
- Revenue and profit before vs after
- Works for price cuts too
Revenue forecast calculator
Month-by-month revenue from traffic, conversion rate and average order value, with monthly growth, a chart and a CSV export.
- Traffic × conversion × AOV
- Monthly growth and a conversion ramp
- Month a revenue target is reached
Marketing budget calculator
Work back from a revenue target to a marketing budget using target ROAS, CAC or a share of revenue, then split it across channels.
- Budget from target ROAS or CAC
- Split by channel with channel ROAS
- Expected revenue and the gap to target
YouTube money calculator
Estimate YouTube earnings from views and your own RPM, work out RPM from past earnings, or derive ad RPM from CPM and the 55% revenue share.
- Views × RPM range, plus Shorts
- RPM from your Analytics numbers
- CPM → RPM with the official share
Cost per lead calculator
Compare CPL across channels, then the cost per qualified lead and per closed deal, so the cheapest form fill does not win the budget by default.
- One row per channel
- Cost per qualified lead and per deal
- Break-even CPL from deal value
Email metrics calculator
Delivery rate, open rate, click rate, click-to-open rate, unsubscribe and complaint rate, revenue per email and ROI from one campaign's numbers.
- Open, click and click-to-open rate
- Gmail and Yahoo complaint limits
- Why Apple Mail inflates opens
Lead scoring model
Build a lead scoring model with fit and behavior rules and score decay, paste a lead list from your CRM, and download it scored and sorted.
- Editable fit and behavior rules
- Half-life decay on behavior
- Paste a CSV, export the scored list
Pipeline coverage calculator
Divide open pipeline by the quota still to close, compare it with the coverage your own win rate requires, and see the gap in money and deals.
- Coverage from your own win rate
- Gap in pipeline and number of deals
- Optional weighted pipeline by stage
QR code generator
QR codes for URLs, text, Wi-Fi, contacts and WhatsApp. Add UTM tags to track scans, download PNG or SVG, add a logo, check contrast, batch export.
- UTM tags so scans show up as a campaign
- PNG / SVG, size, error correction, colors
- Logo coverage check and batch ZIP export
Questions about the tools
Still have a question?
Chat with the team behind TapCub — we usually reply within a few hours on business days.
Do I need a TapCub account to use them?
No. The tools are public pages. An account only matters when you want the same numbers computed from your live traffic instead of typed in.
Is anything I type sent to TapCub?
No. Almost every tool runs entirely in your browser. A few lookup tools (DNS, WHOIS, page speed) send only the domain or URL you enter, from your browser straight to a public service such as Cloudflare DNS, the domain registry or Google PageSpeed, and only when you press the button; each of those pages says where the request goes. We record that a tool page was viewed and used, like any other page — never the values.
Are the tools kept up to date?
Yes. Every tool page lists its version, an update history and the date each data source was last checked. Data such as crawler rules, public holidays and platform limits is re-checked on a schedule, and all tool updates are listed in one place.
Can I embed or link to a tool?
Linking is welcome. The pages have stable URLs under /tools. We do not offer an embed, but the formulas are documented on each page so you can reproduce them.
Why do my numbers differ from my analytics tool?
Usually the definition, not the arithmetic: who counts as a visitor, which event converts, and whether bots were removed first. Each tool lists the definition it assumes. See why UV never matches.
Will there be more tools?
When a question comes up often in support we turn it into a page. Suggestions go to contact.