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
VaR calculator
value at risk from volatility and horizon
POST /fin/var$0.002Developer Utilities
WACC calculator
weighted average cost of capital, free
POST /fin/wacc$0.002Developer Utilities
Wage calculator
annual salary from hourly wage, hours, weeks
POST /fin/wage$0.002Developer Utilities
Website ad revenue calculator
monthly CPC earnings
POST /fin/website-ad-revenue$0.002Developer Utilities
Wedding budget calculator
guests, venue, catering and decor, free
POST /fin/wedding-budget$0.002Developer Utilities
Weekly pay calculator
hourly rate, hours, overtime 1.5×
POST /fin/weekly-pay$0.002Developer Utilities
Working capital turnover ratio
sales per unit of WC, free
POST /fin/working-capital-turnover-ratio$0.002Developer Utilities
Year-over-year growth calculator
percent from two yearly values
POST /fin/year-over-year-growth$0.002Developer Utilities
Yearly wage calculator
annual salary from hourly rate
POST /fin/yearly-wage$0.002Developer Utilities
Zakat calculator
2.5% on cash, gold, silver and investments
POST /fin/zakat$0.002Developer Utilities
Seconds to minutes converter
minutes and leftover seconds, free
POST /conv/seconds-to-minutes-converter$0.002Developer Utilities
Seconds to years conversion
31536000 seconds per year, free
POST /conv/seconds-to-years-conversion$0.002Developer Utilities
Square centimeters to square millimeters converter
exact ×100, free
POST /conv/square-centimeters-to-square-millimeters-converter$0.002Developer Utilities
Square feet converter
square meters, acres and square yards
POST /conv/square-feet-converter$0.002Developer Utilities
Square meter converter
square feet, yards and centimeters
POST /conv/square-meter-converter$0.002Developer Utilities
Square miles to square km converter
exact factor, free
POST /conv/square-miles-to-square-km-converter$0.002Developer Utilities
Square yard converter
square feet, meters, and acres, free
POST /conv/square-yard-converter$0.002Developer Utilities
Tablespoons to milliliters converter
US tbsp to mL
POST /conv/tbsp-to-ml$0.002Developer Utilities
Tsp to mL converter
teaspoons to milliliters
POST /conv/tsp-ml-converter$0.002Developer Utilities
Celsius Fahrenheit Kelvin converter
convert C, F and K
POST /conv/temperature-converter$0.002Developer Utilities
Time zones converter
IANA named zones, fixed offsets
POST /conv/time-zones$0.002Developer Utilities
Torr to atm converter
exact 760 torr factor, free
POST /conv/torr-to-atm$0.002Developer Utilities
Teaspoons to grams converter by ingredient
POST /conv/tsp-to-grams$0.002Developer Utilities
Unicode text converter
bold, italic & monospace, free
POST /conv/unicode-text$0.002Developer Utilities
Unix time converter
epoch seconds to UTC date-time
POST /conv/unix-time$0.002Developer Utilities
Uppercase to lowercase converter
ALL CAPS text to lower case, free
POST /conv/uppercase-to-lowercase-converter$0.002Developer Utilities
Weeks to months converter
approximate calendar months, free
POST /conv/weeks-to-months$0.002Developer Utilities
Weight converter
kilograms, grams, pounds and ounces
POST /conv/weight-converter$0.002Developer Utilities
Weeks to years converter
365.25-day average year, free
POST /conv/weeks-to-years-converter$0.002Developer Utilities
Weird units converter
smoots, furlongs, cubits
POST /conv/weird-units$0.002Developer Utilities
Yard conversion
yards to feet, inches, meters, cm, free
POST /conv/yard-conversion$0.002Developer Utilities
Yard to meter conversion
exact 0.9144 factor, free in browser
POST /conv/yard-to-meter-conversion$0.002Developer Utilities
Yard to mile converter
exact yards to miles calculator
POST /conv/yard-to-mile-converter$0.002Developer Utilities
Yards to acres converter
square yards to acres
POST /conv/yards-to-acres$0.002Developer Utilities
AI job risk calculator
estimate automation risk from job tasks
POST /biz/ai-job-risk$0.002Developer Utilities
Years to decades converter
10 years per decade, free
POST /conv/years-to-decades$0.002Developer Utilities
Zulu time converter
local clock and UTC offset to HH:MMZ
POST /conv/zulu-time-converter$0.002Developer Utilities
Age on Other Planets Calculator
Mercury to Neptune
POST /date/age-on-other-planets$0.002Developer Utilities
Amdahl's law calculator
theoretical parallel speedup
POST /dev/amdahls-law$0.002Developer Utilities
Bloodstain angle of impact calculator
width and length
POST /sci/angle-of-impact$0.002Developer Utilities
AP Chemistry Score Calculator
Estimate Your AP Score
POST /edu/ap-chem-score$0.002Developer Utilities
Among Us impostor probability
chance you are impostor
POST /game/among-us$0.002Developer Utilities
AP Lang Score Calculator
Estimate Your 1–5 Score
POST /edu/ap-lang-score$0.002Developer Utilities
AP Biology score calculator
predicted 1–5 from MC and FR
POST /edu/ap-bio-score$0.002Developer Utilities
Aquarium glass thickness calculator
minimum panel thickness
POST /hobby/aquarium-glass-thickness$0.002Developer Utilities
AP World History score calculator
predicted AP score 1 to 5
POST /edu/ap-world$0.002Developer Utilities
ASCII converter
character to code and code to character
POST /enc/ascii-converter$0.002Developer Utilities
Azimuth calculator
bearing between geographic coordinates
POST /geo/azimuth$0.002Developer Utilities
Aquarium volume calculator
liters and gallons from L×W×H, free
POST /hobby/aquarium-volume$0.002Developer Utilities
Bandwidth calculator
estimate download or upload time
POST /elec/bandwidth$0.002Developer Utilities
Battery size calculator
required capacity in watt-hours
POST /elec/battery-size$0.002Developer Utilities
Baud rate calculator
convert bit rate to symbols per second
POST /elec/baud-rate$0.002Developer Utilities
Base64 encoder decoder
encode or decode text, free
POST /enc/base64-encoder-decoder$0.002Developer Utilities
Battery capacity calculator
runtime hours from Ah and current draw
POST /elec/battery-capacity$0.002Developer Utilities
Coaxial cable impedance calculator
characteristic impedance in ohms
POST /elec/cable-impedance$0.002Developer Utilities
Binary to text converter
8-bit ASCII decode, free
POST /enc/binary-to-text$0.002Developer Utilities
BPM calculator
tempo from beats counted over seconds, free
POST /hobby/bpm$0.002Developer Utilities
Gemstone Carat Weight Calculator
Estimate from Dimensions
POST /hobby/carat-weight$0.002Developer Utilities
Capital case converter
first letter of each word upper
POST /str/capital-case-converter$0.002Developer Utilities
Christmas Tree Ornament and Light Calculator
POST /date/christmas-tree$0.002