Online Business Calculators
ROI, margin, markup, discounts, break-even and conversion rate. Six business calculators in a single tool, with instant results.
Office Tools Business Calculators let you compute ROI, profit margin, markup, discounts, break-even point and conversion rate in seconds. Built for freelancers, SMBs and B2B teams that need fast financial metrics without opening spreadsheets. Included in the Plus plan from €5/month.
6 business calculators in a single tool
Designed to cover every financial calculation you do day-to-day.
ROI Calculator
(Return − Investment) / Investment × 100Measure the profitability of any investment: campaigns, products, training, equipment.
Profit margin
(Price − Cost) / Price × 100Compute gross margin and markup from sale price and unit cost.
Break-even point
Fixed costs / (Price − Variable cost)Find out how many units you need to sell to cover all your costs.
Markup → Price
Cost × (1 + Markup%)Set the selling price from your cost and the desired commercial margin.
Two-way discounts
Price × (1 − %)Compute the discounted price or, conversely, the % discount applied.
Conversion rate
Conversions / Visitors × 100Measure the effectiveness of a page or campaign; optionally compute CPA.
How to use the business calculators
Pick the right calculator
All six calculators are on the same screen. Find the one you need (ROI, margin, markup, discounts, break-even or conversion) and start typing values.
Enter values in currency or percentages
Each calculator has 2 or 3 fields. Comma and dot decimals are accepted, and non-numeric characters are filtered out automatically to avoid errors.
Read the results instantly
The result block appears as soon as the data is valid. The highlighted row shows the main metric (ROI, price, minimum units, etc.).
What you can compute with this tool
The Business Calculators cover the financial and commercial metrics most used by freelancers, SMBs and mid-market companies. Every calculator follows standard accounting and marketing formulas so you can trust the results.
📈 ROI: investment profitability
Return on Investment is the universal metric for evaluating whether an investment paid off. Useful for ad campaigns, product launches, employee training, hires or equipment purchases. The calculator also shows the multiplier (how many times you have recovered your investment) and the net gain.
💹 Gross profit margin and markup
Compute gross margin (% of price that is profit) and markup (% on cost) from sale price and unit cost. Essential for pricing in e-commerce, retail, hospitality and professional services.
⚖️ Break-even point
Find out how many units you need to sell to cover all costs (fixed and variable). It is the most important calculation before launching a product, opening a venue or validating a business model. The calculator shows minimum units and minimum revenue.
🏷️ Selling price from markup
The reverse of margin: enter unit cost and the desired markup %, and get the exact selling price. A must-have for setting prices across large catalogs while keeping margins consistent.
💸 Two-way discount calculator
Compute the final price applying a % discount or, conversely, derive the % discount applied from the original and final price. Handy for promotions, sales, Black Friday offers and supplier comparisons.
🎯 Conversion rate and CPA
Measure the effectiveness of a landing page, funnel or marketing campaign by dividing conversions by visitors. Add ad spend and you also get CPA (cost per acquisition) and CPV (cost per visitor), the two key metrics for any Google Ads, Meta Ads or LinkedIn campaign.
Everything included
6 calculators in one tool
ROI, margin, markup, discounts, break-even and conversion. No tab switching.
Real-time results
No calculate button: values update with every keystroke.
Automatic validation
Clear warnings when data is inconsistent (cost greater than price, etc.).
Flexible number format
Accepts comma or dot decimals and shows results with clear separators, useful across regions.
Mobile-optimized
Native numeric keyboard on iOS and Android for fast input.
No install
Runs in your browser. Available with your Office Tools Plus account.
Who uses the Business Calculators?
Founders and entrepreneurs
Need: Validate the economic viability before launching a product or business.
Compute break-even and projected ROI in seconds before investing.
CFOs and controllers
Need: Quick metrics for meetings, committees and executive dashboards.
Get margins and break-even points without opening Excel or internal macros.
E-commerce managers
Need: Set competitive prices while protecting target margin.
Use the markup calculator to set final prices straight from cost.
Marketers and growth managers
Need: Evaluate campaigns and conversion funnels by measuring CPA.
Enter visitors, conversions and spend to get rate and CPA instantly.
Advisors and consultants
Need: Show calculations live to clients during a meeting.
Share your screen and tweak inputs live: results recalculate on the fly.
Business and MBA students
Need: Practice financial concepts and verify exercises.
Simulate break-even, ROI and margin cases with real numbers.
Frequently asked questions
Everything you need to know about ROI, margin, break-even and the rest of the business metrics.
Break-even is fixed costs divided by the unit contribution margin (sale price minus variable cost). For example, with €5,000 in fixed costs, a €25 selling price and a €10 variable cost, you need to sell 5,000 / (25 − 10) = 334 units to cover all costs. The Office Tools calculator does this in real time and also shows the minimum revenue required.
Make financial decisions backed by data
6 business calculators, instant results.
Plus plan from €5/month · Cancel anytime