Other Unit Converters: Sizes, Data and More

Convert quantities that do not fit neatly into standard length, weight or volume categories. These tools help shoppers compare Ring Size, Shoe Size and Clothing Size; cooks switch between measurements; and travelers compare fuel economy. For digital tasks, use Digital Storage, Data Transfer Rate and Download Time Estimator to make sense of file sizes and speeds.The collection also includes a Pressure Converter, Astronomical Distance calculator and Metric Prefix converter for students and technical work. Choose the calculator that matches what you need to convert or estimate.

Download Time Estimator

Enter a file size in KB, MB, or GB to estimate its download time at four preset connection speeds, from 56 kbps to 100 Mbps.

Clothing Size

Convert clothing sizes between US, UK, EU and international letter sizes (XS–XXL) for women's and men's tops, dresses, skirts and pants. Enter your size, pick the system and garment type, and get all equivalents plus the key body measurement in inches and centimeters.

Knitted Fabric GSM

Enter courses per inch, stitch length in centimeters, and yarn tex to calculate the value returned by this knitted fabric GSM formula. Check the limitations before treating it as a measured fabric weight.

Gold Purity

Convert gold karats to purity percentage, fineness and hallmark stamp — or enter a percentage or fineness value to get the karat equivalent. Just pick your input type and enter the number.

Image DPI & Pixel

Find an image’s print width and height from its pixel dimensions and chosen resolution. Enter the width and height in pixels, set the DPI, and select inches or centimeters.

Alcohol Proof

Convert between alcohol by volume (ABV), US proof and UK proof instantly. Enter any strength value and see all three equivalent units plus a context for how strong that drink is.

Astronomical Distance

Convert a value between astronomical units, light-years, parsecs, kilometers, and miles. Enter a distance, then choose the From unit and To unit. Note that this calculator currently gives incorrect results for some light-year and parsec conversions.

Metric Prefix

Convert a value between metric prefixes, from nano to tera. Enter the value, then choose its current prefix and the prefix you want to convert to.

Brewing ABV

Estimate the alcohol content of your homebrew from two hydrometer readings. Enter the original gravity (OG) and final gravity (FG) to get ABV, apparent attenuation and alcohol by weight.

HbA1c

Convert HbA1c between percent (DCCT) and mmol/mol (IFCC) units, and see the estimated average glucose (eAG) it represents. Enter your lab result and choose its unit.

Aspect Ratio

Enter the width and height of an image, screen or video to find its aspect ratio, its common name (like 16:9), and the matching dimension for any proportional resize.

Data Transfer Rate

Convert data transfer rates between bits and bytes per second instantly. Enter a value in Mbps, kbps, Gbps, MB/s or any other unit and see all equivalents at once.

Digital Storage

Convert a value between bits, bytes, KB, MB, GB, and TB using 1024-based storage units. Enter an amount, then select the From unit and To unit.

CSS Units

Convert a CSS length between px, rem, em, vw, vh, pt and percent. Enter the value, pick its unit, set the root and parent font sizes plus viewport dimensions, and get all equivalents at once.

Roman Numerals

Convert any whole number from 1 to 3999 into its Roman numeral, or translate a Roman numeral back into an Arabic number. Just pick the direction, type your value, and get the result instantly.

Fuel Economy Converter

Convert fuel economy between MPG (US), MPG (UK), liters per 100 km and km/L. Enter any value, choose its unit, and get all four equivalents at once.

Ring Size

Convert between US, UK and EU ring sizes, or enter your finger circumference or a ring's inner diameter in millimetres to find your size in all systems at once.

Cooking Measurement

Convert cooking volumes between teaspoons, tablespoons, cups, US fluid ounces, milliliters, and liters. Enter a value, then choose the units to convert from and to.

Shoe Size

Convert between US men's, US women's, UK and EU shoe sizes, or enter your measured foot length in cm or inches to see your size in every system at once.

Calculators