Precision Unit Converter
for Humans & Engineers
Instant bidirectional conversions across standard measurements, scientific units, and computing systems. High-precision arithmetic with clean formula explanations.
Trending & Popular Conversions
Dedicated high-traffic tools with full conversion tables and formulas.
Browse Conversion Categories
Select any domain below to access dedicated unit selectors, quick-reference tables, and formulas.
Length & Distance
Convert between metric and imperial distance measurements including meters, feet, miles, and inches.
Weight & Mass
Convert between kilograms, grams, pounds, ounces, stones, and metric tons with instant precision.
Volume & Liquid
Calculate volume and liquid capacity conversions across liters, milliliters, gallons, cups, and fluid ounces.
Temperature
Instant conversion between Celsius, Fahrenheit, and absolute thermodynamic Kelvin.
Digital & Computing
Convert data storage units (KB, MB, GB, MiB) and translate number systems between binary, decimal, and hex.
Speed & Velocity
Convert speed and velocity units including km/h, mph, m/s, and nautical knots.
Area & Land
Convert between square meters, square feet, square kilometers, acres, and hectares.
Time & Duration
Calculate time conversions between milliseconds, seconds, minutes, hours, days, weeks, and years.
Built for Mathematical Precision
Most web converters produce floating point rounding errors like 0.1 + 0.2 = 0.30000000000000004. Unitly solves this at the engine level.
Float Noise Elimination
Significant-digit normalization strips binary IEEE 754 precision artifacts so you get exact numbers without long decimal trails.
Arbitrary-Precision Radix
BigInt conversion prevents integer overflow when translating long binary, octal, decimal, and hexadecimal codes up to hundreds of bits.
Physical Boundary Validation
Automatic physics constraint validation guards against impossible negative Kelvin temperatures or negative spatial dimensions.