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Real-time calculations as you type. No submit button, no waiting — answers appear immediately.
Free forever · 9 currencies · 150+ countries
Business calculators
built for the real world
500+ free calculators, simulators, and decision tools for sellers, manufacturers, startups, and finance pros.
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500+
Tools (roadmap)
150+
Countries
9
Currencies
100%
Free forever
Featured tool
Amazon FBA
Profit Calculator
Calculate your true Amazon profit, margin, ROI, and break-even price in seconds. Visualise cost breakdown and project monthly profit.
- Real-time profit, margin, ROI & break-even
- All Amazon FBA fees factored in automatically
- Visual cost breakdown & monthly projection charts
- Multi-currency: works in USD, INR, GBP, EUR, AED & more
Profit Result
LiveNet Profit per Unit
$5.67
After all Amazon fees
Margin
18.9%
ROI
70.9%
Monthly
$538.00
Monthly profit by volume
501002005001K
Real-time
Tool ecosystems
Built for every business
Five specialised ecosystems covering every stage of business operations, from launching products to scaling teams.
Ecommerce Seller Operations
Profit, inventory, shipping, and ads tools for marketplace sellers
20live · 4 categories
India Business Operations
HR, salary, GST, and business finance tools for Indian businesses
0live · 3 categories
Manufacturing & ERP Operations
Production planning, costing, and maintenance tools for manufacturers
0live · 4 categories
Startup & Business Intelligence
Runway, fundraising, equity, and growth tools for founders
0live · 3 categories
Operational Financial Planning
Personal finance, business planning, and risk analysis tools
0live · 3 categories
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Why Calcrux
Calculators, done right
Geo-aware by default
Auto-detects your country and switches currency, tax label, and number formatting to match.
Private by design
All calculations happen in your browser. Your numbers never leave your device.
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No sign-up. No credit card. No limits. Just instant, accurate business calculations.