Calculators & Converters
Free online calculators for tax, loans, dates, pay, health, fuel, electricity and unit conversion with instant results.
About these tools
Online calculators remove arithmetic errors and save time. BillGen’s calculators cover tax (GST, VAT, sales tax), loans (EMI, payoff), pay (salary, hourly, overtime), everyday maths (percentage, discount, tip, average, simple interest), health (BMI), dates (age, working days, date and time) and conversions (units, currency).
Results update as you type and can be copied, printed or downloaded as PDF. Outputs are estimates and not financial, tax, medical or legal advice.
All 32 tools
- Age Calculator
- Average Calculator
- Binary, Decimal & Hex Converter
- BMI Calculator
- Currency Converter
- Date Calculator
- Days Until Calculator
- Dice Roller & Coin Flip
- Discount Calculator
- Electricity Calculator
- EMI Calculator
- Fraction Calculator
- Fuel Cost Calculator
- GPA Calculator
- GST Calculator
- Hourly to Salary Calculator
- Inflation Calculator
- Mileage Calculator
- Overtime Pay Calculator
- Percentage Calculator
- Random Number Generator
- Ratio Calculator
- Roman Numeral Converter
- Salary Calculator
- Sales Commission Calculator
- Sales Tax Calculator
- Simple Interest Calculator
- Time Calculator
- Tip Calculator
- Unit Converter
- VAT Calculator
- Working Days Calculator