Converter Tools

Temperature Converter

Convert temperatures between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur with instant results and formula display. Free online temperature converter.

Length Converter

Convert length units instantly: meters, kilometers, miles, feet, inches, yards, and nautical miles. Free online length converter with instant results.

Weight Converter

Convert weight units instantly: kilograms, grams, pounds, ounces, stones, and tons. Free online weight converter with instant results.

Speed Converter

Convert speed units instantly: km/h, mph, m/s, knots, and Mach number. Free online speed converter with instant results.

Data Size Converter

Convert data size units instantly: bits, bytes, KB, MB, GB, TB, PB with binary and decimal units. Free online data size converter.

Roman Numeral Converter

Convert between Roman numerals and Arabic numbers instantly with step-by-step calculation. Free online Roman numeral converter.

Number to Words

Convert numbers to English words instantly with standard, currency, and check writing formats. Free online number to words converter.

Percentage Calculator

Calculate percentages, percentage change, increase/decrease, and reverse percentages instantly. Free online percentage calculator.

Age Calculator

Calculate exact age in years, months, days, hours, minutes, and seconds from birth date. Free online age calculator with precise results.

Date Difference Calculator

Calculate exact difference between two dates in years, months, days, hours, minutes, and seconds. Free online date difference calculator with business days option.

BMI Calculator

Calculate your Body Mass Index (BMI) with WHO classification chart and ideal weight range. Free online BMI calculator for men and women.

Fraction Calculator

Add, subtract, multiply, and divide fractions with step-by-step simplification and decimal conversion. Free online fraction calculator.

Tip Calculator

Calculate restaurant tips with percentage presets, split bill among multiple people, and see per-person amounts. Free online tip calculator.

Loan Calculator

Calculate monthly loan payments, total interest, and amortization schedule. Free online loan calculator for mortgages, auto loans, and personal loans.

Currency Converter

Convert between world currencies using live exchange rates. Free online currency converter for USD, EUR, GBP, JPY, and 30+ major currencies.

Time Calculator

Add, subtract, and convert time durations in hours, minutes, and seconds. Free online time calculator for scheduling and time math.

Data Transfer Calculator

Calculate estimated file transfer time based on file size and connection speed. Supports bits, bytes, KB, MB, GB, TB and speeds from Kbps to Gbps.

Angle Converter

Convert between angle units: degrees, radians, gradians, arcminutes, and arcseconds. Free online angle converter with formula display.