Developer Utilities
Small developer utilities that save a trip to a random website. Encode and decode Base64, explain a regex, build UTM links, generate QR codes and vCards, and more — the everyday helpers. Free in your browser, and available by API when you need them in a script.
Developer Utilities
Skewness calculator
sample G1 coefficient of a numeric list
POST /stat/skewness$0.002Developer Utilities
Standard error calculator
SE = s/√n from sample SD and n, free
POST /stat/standard-error$0.002Developer Utilities
Two dice probability
P(sum) for two fair six-sided dice
POST /stat/two-dice-probability$0.002Developer Utilities
Weibull distribution calculator
PDF and CDF from shape and scale
POST /stat/weibull-distribution$0.002Developer Utilities
Acres to square miles converter
exact factor, free
POST /conv/acres-to-square-miles$0.002Developer Utilities
Angstrom to nm converter
wavelength Å ÷ 10, free
POST /conv/angstrom-to-nm-conversion$0.002Developer Utilities
Ares to hectares converter
100 ares = 1 ha, free
POST /conv/ares-to-hectares$0.002Developer Utilities
Astronomical unit converter
AU to km and miles, free
POST /conv/astronomical-unit$0.002Developer Utilities
ATM to pascals conversion
exact 101325 Pa factor, free
POST /conv/atm-to-pascals-conversion$0.002Developer Utilities
Bar to psig converter
gauge pressure, free in browser
POST /conv/bar-to-psig-conversion$0.002Developer Utilities
Billion to trillion converter
divide by 1,000
POST /conv/billion-to-trillion-converter$0.002Developer Utilities
Binary converter
decimal integer ↔ base-2 string, free
POST /conv/binary$0.002Developer Utilities
Binary to octal converter
base-2 string to base-8, free
POST /conv/binary-to-octal$0.002Developer Utilities
Byte converter
convert bytes, KB, MB, GB, TB free
POST /conv/byte-converter$0.002Developer Utilities
CC to grams converter
volume × density, free
POST /conv/cc-to-grams-converter$0.002Developer Utilities
CC to ml converter
1 cc equals 1 ml exactly, free
POST /conv/cc-to-ml-converter$0.002Developer Utilities
CC to oz converter
cubic centimeters to US fluid ounces
POST /conv/cc-to-oz-converter$0.002Developer Utilities
CCF to therms converter
natural gas volume to energy, free
POST /conv/ccf-to-therms$0.002Developer Utilities
Centigrade to Celsius converter
identical scale, free
POST /conv/centigrade-to-celsius$0.002Developer Utilities
Centimeter converter
cm, inches, feet, meters, mm, free
POST /conv/centimeter$0.002Developer Utilities
Cents to euros converter
divide euro cents by 100, free
POST /conv/cents-to-euros$0.002Developer Utilities
CGS system of units converter
SI to cm, g, s, free
POST /conv/cgs-system-of-units$0.002Developer Utilities
CM height conversion
centimeters to feet and inches, free
POST /conv/cm-height-conversion$0.002Developer Utilities
CM to in converter
centimeters to inches, exact 2.54
POST /conv/cm-to-in$0.002Developer Utilities
CM to km converter
exact 100000 factor, free
POST /conv/cm-to-km-conversion$0.002Developer Utilities
CM to mm conversion
centimeters to millimeters, free
POST /conv/cm-to-mm-conversion$0.002Developer Utilities
Conversion calculator
same-kind units with fixed factors, free
POST /conv/conversion-calculator$0.002Developer Utilities
CPS converter
characters/s to B/s, bit/s and baud, free
POST /conv/cps-converter$0.002Developer Utilities
Crore to million converter
1 crore = 10 million, free
POST /conv/crore-to-million$0.002Developer Utilities
Cubic feet converter
in³, m³, liters, US gallons, free
POST /conv/cubic-feet$0.002Developer Utilities
Cubic feet to cubic meters converter
exact factor, free
POST /conv/cubic-feet-to-cubic-meters$0.002Developer Utilities
Cubic inches to gallons converter
exact US factor, free
POST /conv/cubic-inches-to-gallons$0.002Developer Utilities
Cubic meter to ton converter
m³ to metric tons by density, free
POST /conv/cubic-meter-to-ton$0.002Developer Utilities
Cubic yards to tons converter
volume × density, free
POST /conv/cubic-yards-to-tons$0.002Developer Utilities
Cups to oz converter
exact US fluid factor, free
POST /conv/cups-to-oz$0.002Developer Utilities
Cups to pints converter
US cups divided by two, free
POST /conv/cups-to-pints-converter$0.002Developer Utilities
Cups to quarts converter
4 cups equal 1 US quart, free
POST /conv/cups-to-quarts-converter$0.002Developer Utilities
Days to months converter
30.44 days per month, free
POST /conv/days-to-months$0.002Developer Utilities
Days to years converter
365.25-day average year, free
POST /conv/days-to-years$0.002Developer Utilities
Decagram to gram converter
multiply by 10, free
POST /conv/decagram-to-gram$0.002Developer Utilities
Decimeter to meter converter
exact SI factor, free
POST /conv/decimeter-to-meter$0.002Developer Utilities
Degrees minutes seconds
decimal degrees to DMS, free
POST /conv/degrees-minutes-seconds$0.002Developer Utilities
Degrees to minutes converter
decimal deg × 60, free
POST /conv/degrees-to-minutes$0.002Developer Utilities
Dimensional analysis checker
SI base-unit consistency, free
POST /conv/dimensional-analysis$0.002Developer Utilities
Dimes to dollars converter
US dime face value, free
POST /conv/dimes-to-dollars$0.002Developer Utilities
Decimeter conversion
dm to m, cm and mm, free
POST /conv/dm-conversion$0.002Developer Utilities
Celsius to Fahrenheit converter
exact C×9/5+32, free
POST /conv/fahrenheit$0.002Developer Utilities
Feet and inches
convert inches to ft plus leftover in
POST /conv/feet-and-inches$0.002Developer Utilities
Feet converter
inches, yards, meters, centimeters, free
POST /conv/feet-converter$0.002Developer Utilities
Fluid ounces to pounds converter
water density, free
POST /conv/fluid-ounces-to-pounds-conversion$0.002Developer Utilities
Foot to centimeter converter
exact 30.48 factor, free
POST /conv/foot-to-centimeter-converter$0.002Developer Utilities
Grams to ounces converter
exact 28.349523125 g/oz, free
POST /conv/g-to-oz$0.002Developer Utilities
Gaj to square yard converter
one-to-one area, free
POST /conv/gaj-to-square-yard-converter$0.002Developer Utilities
Gallon to tons converter
water volume to metric tons, free
POST /conv/gallon-to-tons$0.002Developer Utilities
Gallons to cubic feet converter
exact US factor, free
POST /conv/gallons-to-cubic-feet$0.002Developer Utilities
Gallons to pints converter
US gallons times eight, free
POST /conv/gallons-to-pints-converter$0.002Developer Utilities
Gallons to pounds converter
water density, free
POST /conv/gallons-to-pounds$0.002Developer Utilities
Gematria calculator
English ordinal A=1 to Z=26 total
POST /conv/gematria$0.002Developer Utilities
Gr to ml converter
grams to milliliters, free
POST /conv/gr-to-ml-converter$0.002Developer Utilities
Grains to teaspoons converter
grains-per-tsp factor, free
POST /conv/gr-to-tsp-converter$0.002