Numbers & Math Tools
From simple percentage math to mortgage planning, our calculators deliver clear results without needing to look up formulas yourself. All calculations run directly on your device.
The BMI Calculator classifies your weight in relation to your height. Units, percentages, discounts and price-per-unit are handled by matching tools. For more complex tasks, the Calculator and Percentage Calculator give you step-by-step intermediate and final results.
Numbers & Math 11
Random Number Generator
Generate random numbers within a custom range, perfect for giveaways, lotteries, or whenever an unpredictable decision is called for. GDPR-compliant.
BMI Calculator
Calculate your Body Mass Index (BMI) and see which weight category you fall into, a useful orientation for health and well-being. GDPR-compliant.
Mortgage Calculator
Calculate the monthly payment, interest burden, and a full amortization schedule for your loan, a foundation for planning your mortgage. GDPR-compliant.
Percentage Calculator
Calculate percentages, proportions, and changes in three calculation modes, for commission calculations, discounts, or percentage shifts. GDPR-compliant.
Unit Converter
Convert length, weight, volume, temperature, and speed quickly and accurately, practical for everyday use, travel, or technical calculations. GDPR-compliant.
Discount Calculator
Calculate the final price after a discount or find the original price back, so you always know exactly what you are saving. GDPR-compliant.
Unit Price Calculator
Calculate the unit price from total price and quantity, handy when shopping, so you can quickly compare products and save money. GDPR-compliant.
Calculator
Free online calculator with standard and scientific modes, no signup required, for quick calculations of all kinds and sizes. GDPR-compliant.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal to compare results directly, without any conversion detours. GDPR-compliant.
Roman Numeral Converter
Convert between Roman and Arabic numerals from 1 to 3999, directly in your browser for fast and easy base conversion.
Inflation Calculator
Check your purchasing power and money devaluation using the official Consumer Price Index from Destatis, base 2020=100, 2025 annual average. GDPR-compliant.