Business Tools
- Break-even Calculator
- Operating Leverage Calculator
- Sales per Employee Calculator
- Revenue per Customer Calculator
- Inventory Days Calculator
A trusted digital tools library
Calculators and digital tools.
In one platform.
Discover ready-to-use digital tools for calculation, conversion, and productivity. Active tools appear as soon as they are published, with a fast and clear experience on every device.
- Instant results
- Clearly explained formulas
- Works on every device
1000active tools
2active languages
6featured tools
8available categories
← Tools
Featured calculators
VAT Calculator
Calculate VAT amount and total from a pre-tax price and a rate you enter, with guidance to verify the applicable rate.
Use calculator ←Discount Calculator
Calculate discount amount and final price, with an example showing why sequential discounts are not simply added together.
Use calculator ←Profit Margin Calculator
Calculate profit margin from cost and selling price, and understand the difference between margin and markup.
Use calculator ←ROI Calculator
Calculate return on investment from cost and return, with context on time period, risk, and limits of simple ROI.
Use calculator ←Percentage Calculator
Calculate a part as a percentage of a total, with a clear example and checks for 50%, 100%, and values above 100%.
Use calculator ←Average Calculator
Calculate an arithmetic mean from a known total and count, with a worked example and a quick verification check.
Use calculator ←Browse by category
Direct calculators by category
Direct access to every active tool, organized by category so you can reach what you need quickly.
Math Tools
- Weighted Mean Calculator
- Proportion Value Calculator
- Geometric Mean Calculator
- Harmonic Mean Calculator
- Square Diagonal Calculator
Marketing Tools
View category ←Advertising Tools
- Page RPM Calculator
- Ad RPM Calculator
- Ad Request RPM Calculator
- AdSense Revenue Estimator
- Break-even ROAS Calculator
Online Income Tools
- Website Revenue per Visitor Calculator
- Creator RPM Calculator
- Sponsored Content CPM Calculator
- Affiliate Commission per Sale Calculator
- Affiliate EPC Calculator
Finance Tools
- VAT Calculator
- Price Including VAT Calculator
- Pre-tax Price Calculator
- Discount Calculator
- Percentage of Amount Calculator
General Tools
View category ←Converter Tools
- CBM Calculator
- Centimeter to Meter Converter
- Meter to Kilometer Converter
- Kilogram to Pound Converter
- Pound to Kilogram Converter
About the Web Empire library
Web Empire brings together a wide range of digital tools in one place, from calculators and converters to text and productivity tools, with clear categories and fast search.
Every tool enabled in the admin panel appears automatically in the library, while inactive tools remain hidden until they are ready to publish.