Financial calculators for margin, marketing, and growth
Run the numbers that actually drive decisions. This suite puts eighteen business calculators in one place, from gross and net margin to CAC, LTV, ROAS, and CAGR. Pick a calculator, enter your figures, and see the result and the formula behind it, so you know
not just the answer but how it was reached.
Business tools
Financial calculators for margin, marketing, and growth
Nineteen calculators for the numbers behind pricing, campaign, and investment decisions. Each one shows the result and the formula that produced it, so you can defend the number in the room where it gets used.
Start with the question
Pick the decision in front of you, or search if you already know the metric.
19 calculators
All 19 calculators
Margin and pricing
- Gross profit margin What share of revenue is left after cost of goods sold.
- Net profit margin What share of revenue is left after every cost.
- EBITDA Earnings before interest, taxes, depreciation and amortization, and the margin it leaves.
- Markup to margin Convert a markup percentage into the margin it produces.
- Price from cost and margin Set a selling price that hits your target margin.
- Break-even point Units and revenue needed to cover fixed costs.
- Discount and markdown Sale price, and what the discount costs your margin.
Marketing and acquisition
- Return on investment (ROI) The percentage return you earned on what you spent.
- Return on ad spend (ROAS) Revenue earned for every unit of ad spend.
- Customer acquisition cost (CAC) What it costs to win one new customer.
- Customer lifetime value (LTV) Total revenue expected from an average customer.
- LTV to CAC ratio How lifetime value compares to acquisition cost.
- Cost per thousand (CPM) What you pay for a thousand ad impressions.
- Cost per click (CPC) Average cost of a single ad click.
- Conversion rate Share of visitors who took the action you wanted.
Growth and return
No calculator matches that search. Try a broader term such as margin, cost, or growth.
Every calculator runs on your device. Nothing is sent to a server.
How the calculators work
Three steps, the same on every page.
Start with the decision
Pick a question above and the list narrows to the calculators that answer it.
Enter your figures
Each calculator opens with sample numbers. Replace them and the result, formula, and reading update together.
Share the result
Copy a link that reopens with your figures in place, or copy the result into a report.
What every calculator page gives you
An answer is only useful if you can explain where it came from.
Got questions?
What is the difference between margin and markup?
Margin is profit as a share of the selling price. Markup is profit as a share of the cost. A 50 percent markup is a 33.3 percent margin, which is why the two are so often confused in pricing decisions.
Which calculator should I use to judge an ad campaign?
ROAS for the immediate revenue return, CAC for what a customer costs to win, and LTV to CAC for whether that cost is sustainable. Read them together rather than one at a time.
Why does each calculator have its own page?
Each calculator page carries the formula, a worked example, and notes on where the number misleads, so the explanation sits next to the calculation it describes.
Are these calculators free to use?
Yes. Every calculator runs in your browser, nothing is sent to a server, and no account is required. Results can be shared as a link that reopens with your figures filled in.
More tools for running the business
Free, in the browser, and nothing to sign up for.
Numbers are the easy part
Getting the calculation right takes two inputs. Getting an organization to agree on what counts as gain, what counts as cost, and what the number should change takes considerably longer.
That translation work is most of what I do. Westphal Solutions builds websites, tools, and reporting for nonprofits and growing teams, including the measurement setup that makes a number like this one worth trusting.