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💰 Finance & moneyFree
Weekly pay calculator
Your weekly gross for 40 regular hours and 5 overtime hours at 20 an hour is 950, before tax or benefits come out.
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💰 Finance & moneyFree
Working capital turnover ratio
Net annual sales of 500,000 on average working capital of 100,000 give a turnover of 5: five units of sales for every unit tied up in working capital.
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💰 Finance & moneyFree
Year-over-year growth calculator
A rise from 100 last year to 112 this year is 12% year-over-year growth, given straight as a percent rather than 0.12.
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💰 Finance & moneyFree
Yearly wage calculator
25 an hour for 40 hours a week comes to 52,000 a year before tax. Enter your rate and your usual weekly hours to see the annual figure over 52 weeks, plus…
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💰 Finance & moneyFree
Zakat calculator
With 10,000 in cash, gold, silver and investments and a nisab of 4,000, the zakat due is 250: 2.5% of the whole total.
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📏 Unit convertersFree
Seconds to minutes converter
Split a count of seconds into whole minutes and the seconds left over: 125 seconds are 2 minutes and 5 seconds, ready for a video chapter list, a swim split or…
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📏 Unit convertersFree
Seconds to years conversion
Divide a second count by 31536000, the seconds in a 365-day common year: 63072000 seconds are exactly 2 years, so uptime, warranty timers and lease clocks read…
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📏 Unit convertersFree
Square centimeters to square millimeters converter
1 cm² is exactly 100 mm², because 1 cm is 10 mm and area grows with the square of that factor. Turn a square-centimetre figure from a drawing, a lab sheet or a…
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📏 Unit convertersFree
Square feet converter
43,560 square feet are exactly 1 acre, 4840 square yards and 4046.8564224 square metres. Enter an area in square feet once and get all three for a property…
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📏 Unit convertersFree
Square meter converter
1 m² is 10.7639104167097 square feet, 1.19599004630108 square yards and 10000 square centimetres. Enter a room, floor or material area in square metres once and…
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📏 Unit convertersFree
Square miles to square km converter
One square mile is exactly 2.589988110336 km², not the 2.6 of classroom shortcuts. Turn a US county, park or wildfire area from square miles into the square…
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📏 Unit convertersFree
Square yard converter
1 square yard is exactly 9 square feet and 0.83612736 square metres. Enter an area in square yards and get square feet, square metres and acres together for…
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📏 Unit convertersFree
Tablespoons to milliliters converter
2 US tablespoons are 29.5735295625 mL, because one US tablespoon is exactly 14.78676478125 mL. Convert American recipe and label amounts into millilitres…
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📏 Unit convertersFree
Tsp to mL converter
2.5 US teaspoons are 12.322303984375 mL. Turn a teaspoon amount from a recipe, a nutrition record or a lab note into milliliters with one fixed factor, so you…
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📏 Unit convertersFree
Celsius Fahrenheit Kelvin converter
Kelvin is Celsius plus 273.15, so 100 °C is 373.15 K. Convert a temperature between Celsius, Fahrenheit and Kelvin, and only those three, when a weather app, an…
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📏 Unit convertersFree
Time zones converter
14:30 in New York is 19:30 in London. Convert a date and time between named zones such as Europe/Paris or Asia/Tokyo with fixed standard offsets, never summer…
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📏 Unit convertersFree
Torr to atm converter
760 torr is exactly 1 atm. Turn a vacuum-gauge or manometer reading in torr into standard atmospheres with one exact division by 760, for gas-law homework…
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📏 Unit convertersFree
Teaspoons to grams converter by ingredient
2.5 teaspoons of all-purpose flour weigh 6.5 g. Choose the ingredient, enter the teaspoons from your recipe and get the grams along with the factor used…
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📏 Unit convertersFree
Unicode text converter
Hello becomes 𝐇𝐞𝐥𝐥𝐨 in Unicode bold. Turn plain text into bold, italic or monospace letters that paste as ordinary characters into a bio, a chat nickname…
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📏 Unit convertersFree
Unix time converter
Unix time 0 is midnight UTC on 1 January 1970. Turn any whole-second epoch timestamp, negative ones included, into the UTC year, month, day, hour, minute and…
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📏 Unit convertersFree
Uppercase to lowercase converter
HELLO World becomes hello world. Paste text stuck in ALL CAPS or mixed case and get every letter in lower case, accents included, while digits, punctuation…
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📏 Unit convertersFree
Weeks to months converter
Turn a week count into average months: on the Gregorian year of 365.2425 days, one month holds about 4.348125 weeks, so long spans are not cut short the way…
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📏 Unit convertersFree
Weight converter
Switch a weight between kilograms, grams, pounds and ounces using exact definitions: one pound is precisely 0.45359237 kg, so 2.5 kg come out as…
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📏 Unit convertersFree
Weeks to years converter
Turn a week count into decimal years on the 365.25-day average year: 52 weeks come to 0.996577686516 years, not a full one, because they cover only 364 days.
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📏 Unit convertersFree
Weird units converter
Treat odd length names as real distances: one fathom is 1.8288 metres and a hand, the unit for horse height, is 0.1016 metres.
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📏 Unit convertersFree
Yard conversion
Type a length in yards and get its four companions at once: one yard is exactly 3 feet, 36 inches, 0.9144 meters and 91.44 centimeters.
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📏 Unit convertersFree
Yard to meter conversion
Change yards into meters with the exact 1959 definition: one yard is precisely 0.9144 meters, never the rough 0.91 that drifts on long lengths.
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📏 Unit convertersFree
Yard to mile converter
Exactly 1,760 yards make one statute mile, and this converter divides by that whole number so a long route built from many short segments never picks up a…
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📏 Unit convertersFree
Yards to acres converter
Turn square yards into acres with the exact international ratio: 4,840 square yards make one acre.
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💰 Finance & moneyFree
AI job risk calculator
A role rated 8 for repetitiveness, 3 for creativity and 4 for human interaction scores 73% automation risk, labeled high.
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📏 Unit convertersFree
Years to decades converter
Ten years make exactly one decade, so a career span, a lease, a product lifetime or a climate record counted in years becomes a decade figure in one step, with…
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📏 Unit convertersFree
Zulu time converter
Give the local hour, minute and UTC offset and get the Zulu time: 14:30 at UTC+2 is 12:30Z. Midnight crossings fold into a valid clock, and half-hour zones work…
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📅 Dates & timeFree
Age on Other Planets Calculator
See your age in the years of each planet from Mercury to Neptune: at 30 on Earth you have lived 124.560561 Mercury years but only 0.182048 of a Neptune year.
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⚙️ Developer UtilitiesFree
Amdahl's law calculator
A program that is 95% parallel runs about 5.93 times faster on 8 processors, not 8 times, and can never pass 20 times however many you add.
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🔬 ScienceFree
Bloodstain angle of impact calculator
A stain 5 mm wide and 10 mm long gives a ratio of 0.5 and an impact angle of 30°; the rounder the stain, the steeper the angle.
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🎓 EducationFree
AP Chemistry Score Calculator
45 correct multiple-choice answers and 34 points on the written questions make a composite of 74.46, an estimated AP Chemistry 5.
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🏠 Home, food & hobbiesFree
Among Us impostor probability
In a 10-player lobby with 2 impostors, your chance of being impostor is exactly 1/5, or 20%, across 45 possible impostor teams.
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🎓 EducationFree
AP Lang Score Calculator
34 multiple-choice answers right plus essays scored 5, 4 and 5 give a composite of 76.78, a predicted AP Lang 5.
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🎓 EducationFree
AP Biology score calculator
48 multiple-choice answers right and 24 points on the written questions give a composite of 73.33 and a predicted AP Biology 4.
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🏠 Home, food & hobbiesFree
Aquarium glass thickness calculator
A 1200 mm panel holding 500 mm of water needs at least 32.4 mm of glass with a safety factor of 3.8, by a simple bending model for float glass.
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🎓 EducationFree
AP World History score calculator
42 multiple-choice answers, 7 short-answer points, a 5 on the DBQ and a 4 on the long essay give a composite just under 74, so the predicted AP World score is a…
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⚙️ Developer UtilitiesFree
ASCII converter
Turn one character into its decimal ASCII code, or a code from 0 to 127 back into its character: uppercase A is 65 and a space is 32.
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🧭 Travel & geographyFree
Azimuth calculator
From London to Paris the initial bearing is 148.115617°, measured clockwise from true north. Enter the coordinates of the start and the destination in decimal…
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🏠 Home, food & hobbiesFree
Aquarium volume calculator
A tank measured inside at 60 × 30 × 36 cm holds 64.8 liters, also shown in US gallons. Enter length, width and water height in cm, mm, m, inches or feet to size…
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🏗️ Engineering & constructionFree
Bandwidth calculator
Enter a file size and a connection speed to see how long a download, upload or backup takes: 1.5 GB at 100 Mbps needs 2 minutes under ideal conditions.
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🎧 Audio & VoiceFree
Audio file size calculator
One CD-quality minute at 44100 Hz, 16-bit, stereo takes 10,584,000 bytes, or 10.584 MB, before any compression.
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🏗️ Engineering & constructionFree
Battery size calculator
Multiply a device's power draw by the hours it must run to get the battery capacity it needs: 25 W for 8 hours calls for 200 Wh of delivered energy.
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🏗️ Engineering & constructionFree
Baud rate calculator
Divide the bit rate by the bits each symbol carries to get the symbol rate in baud: 9,600 bit/s at 2 bits per symbol is 4,800 baud.
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⚙️ Developer UtilitiesFree
Base64 encoder decoder
One converter for both directions: “Ready when you are.” becomes UmVhZHkgd2hlbiB5b3UgYXJlLg==, and any standard Base64 turns back into readable text, emoji and…
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🖼️ ImagesFree
Blink-free photo calculator
With a blink rate of 0.1 per shot and a target of 0.99, you need 3 photos: two give exactly 0.99, which does not beat the target, while three clear it.
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🏗️ Engineering & constructionFree
Battery capacity calculator
Divide a battery's amp-hour rating by the current your device draws to estimate how long it runs: a 100 Ah bank feeding a 5 A load lasts 20 hours.
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🏗️ Engineering & constructionFree
Coaxial cable impedance calculator
A coax with a 10 mm shield bore, a 2.3 mm centre conductor and a dielectric constant of 2.1 comes out at 60.850366 Ω.
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⚙️ Developer UtilitiesFree
Binary to text converter
0100100001100101011011000110110001101111 decodes to Hello: every eight bits make one ASCII character, most significant bit first, and a missing bit or stray…
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🏠 Home, food & hobbiesFree
BPM calculator
Eight beats counted in four seconds is 120 BPM: enter the beats you counted and the seconds on your stopwatch to get the tempo and the length of one beat, 0.5 s…
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🏠 Home, food & hobbiesFree
Gemstone Carat Weight Calculator
A round stone measuring 6.5 × 6.5 mm across and 4 mm deep weighs an estimated 1.0309 carats. Measure length, width and depth, pick one of ten outlines and…
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✍️ Text & AIFree
Capital case converter
Type hello WORLD from the KIT and get Hello World From The Kit: every word starts with a capital and the rest goes lowercase, with no exception list for short…
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📅 Dates & timeFree
Christmas Tree Ornament and Light Calculator
A tree decorated over 8 levels at 12.5 ornaments per level needs 100 ornaments. Enter the levels you will cover and the density you want, and get a whole-item…
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🏠 Home, food & hobbiesFree
Chord calculator
C major is C, E and G, stacked at 0, 4 and 7 semitones from the root. Enter a root such as F# or Bb and a type from major to ninths to get the spelled notes and…
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🏠 Home, food & hobbiesFree
Chord finder
Type C, E and G and the finder names it C major in root position. Enter three or more note names in any octave to get the root, the quality and the inversion of…
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🏠 Home, food & hobbiesFree
Chord inversion calculator
Put C, E and G into first inversion and you get E, G and C; second inversion gives G, C and E. Enter the notes in root position, choose the inversion number and…
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Get your key
Create an account with your email and add balance when you need it. No subscription, no sales call.
2
Call the endpoint
One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.
3
Collect the result
Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.
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On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.
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The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.
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