Unit & Data Converters
Convert length, weight, temperature, currency format, timezones, file sizes — every conversion in one place.
Unit Converter
Length, weight, temperature, area, volume & speed — all in one.
Roman Numerals Converter
Convert decimal ↔ Roman (1–3999) — two-way, validated.
Timezone Converter
See one instant across the world's major timezones.
File Size Converter
Convert between B, KB, MB, GB, TB & PB — 1024-based.
Aspect Ratio Calculator
Find the missing dimension for any aspect ratio.
Currency Formatter
Format any number as a currency — 18 currencies & compact notation.
Shoe Size Converter
Convert adult shoe sizes between US, EU, UK and centimeters.
Ring Size Converter
Diameter or circumference → US, UK, EU and ISO ring sizes.
Cooking Converter
Convert cups, tbsp, tsp, ml, fl oz, liters and grams (water-based).
DPI / PPI Calculator
Compute pixel density from resolution & diagonal — and reverse it.
Height Converter
Convert height between cm, m, ft, in — with feet-and-inches notation.
Clothing Size Converter
Approximate clothing sizes across US, UK, EU, and letter systems.
Data Storage Converter
Convert between bit, byte, KB/KiB, MB/MiB, GB/GiB, TB/TiB.
Download Time Calculator
Estimate download time for any file size and connection speed.
Screen Size Calculator
Compute PPI, physical dimensions, and area from resolution + diagonal.
Binary ↔ Text Converter
Decode binary to text or encode text to binary (UTF-8).
Decimal to Fraction Converter
Find the closest simple fraction for any decimal.
Scientific Notation Converter
Convert between decimal, scientific, and E-notation.
Speed Converter
Convert between m/s, km/h, mph, knots, ft/s, and Mach.
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine.
Distance Converter
Convert length across mm, cm, m, km, in, ft, yd, mi, nmi, light-years.
Weight Converter
Convert mass across mg, g, kg, t, oz, lb, stone, US and UK tons.
Volume Converter
Convert volume across metric, US, and UK liquid units.
Energy Converter
Convert between joules, calories, kWh, BTU, and eV.
Density Converter
Convert density across kg/m³, g/cm³, lb/ft³, lb/in³, and more.
Angle Converter
Convert between degrees, radians, gradians, arcminutes, and more.
Frequency Converter
Convert between Hz, kHz, MHz, GHz, RPM, and angular units.
Fuel Economy Converter
Convert between MPG (US/UK), L/100km, and km/L.
Area Converter
Convert between m², ft², acres, hectares, and more.
Pressure Converter
Convert between Pa, bar, atm, psi, torr, and more.