Unit converters
546 unit converters: length, weight, temperature, volume, speed, pressure, energy, data and cooking measures. Type a value, pick the units and get an exact result with the conversion factor shown, free in your browser.
ML to KG converter
Turn a volume in millilitres into kilograms with the density of your substance: 1000 ml of water at 1 kg per litre is 1 kg.
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ML to lbs converter
Turn millilitres into pounds with the density of your liquid: 1000 ml of water at 1 g per ml is about 2.2046 lb.
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ML to µL conversion
Multiply millilitres by exactly 1000 to get microlitres: 1 ml is 1000 µl and a quarter millilitre is 250 µl.
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Millimeters converter
Enter a length in millimetres and get inches, centimetres and metres at once: 25.4 mm is exactly 1 inch, 2.54 cm and 0.0254 m.
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MM to ATM conversion
Turn a water-column height in millimetres into standard atmospheres: 1 mm of water is 0.000096784111 atm, and about 10332 mm make one full atmosphere.
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MM to km converter
Divide millimetres by exactly one million to get kilometres: 1000000 mm is 1 km and 2.5 million mm is 2.5 km.
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MM to m conversion
Divide millimetres by exactly 1000 to get metres: 2500 mm is 2.5 m and 1 mm is 0.001 m. Take a caliper or sheet-metal reading straight into a site plan or room…
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MPa conversion
Enter one megapascal value and get psi, bar and kilopascals together: 1 MPa is 145.037737730209 psi, 10 bar and 1000 kPa.
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MPa to PSI converter
Multiply megapascals by 145.038 to get psi: 1 MPa is 145.038 psi and 250 MPa is 36259.5 psi. Move mill-certificate yield values and SI pump ratings into the psi…
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m/s to km/h converter
Turn a lab or sensor speed into the unit on road signs: 10 m/s is 36 km/h, because a kilometer is 1000 meters and an hour 3600 seconds, so the factor is exactly…
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Ms to seconds conversion
Turn a millisecond count into seconds by dividing by exactly 1000: 2500 milliseconds are 2.5 seconds, ready for a timeout, a profiling report or a latency…
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Newton-meter converter
Start from a torque in newton-meters and get it in the unit your wrench or spec sheet uses: 1 N·m is 0.737562149277 foot-pounds, and nine target units are…
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Nickels to dollars converter
Count the nickels in a jar or a cash drawer and get the dollar amount: 20 nickels make exactly 1 dollar and 7 nickels make 35 cents, because a US nickel is a…
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NM converter
Find the frequency behind a laser, LED or filter wavelength: 500 nm green light is 599.584916 terahertz, worked out by dividing the exact speed of light…
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Nm to in-lbs converter
Set an inch-pound torque wrench from a metric spec: 1 newton-meter is 8.8507 inch-pounds, so a 10 N·m bolt becomes 88.507 in-lb with one multiplication.
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NM to m conversion
Put a length from a spectrometer or a chip drawing into meters: divide by exactly one billion, so 550 nm, a typical green wavelength, becomes 5.5×10⁻⁷ m, the…
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Number to billion converter
Put a raw count on the billion scale with one exact division: 2,500,000,000 becomes 2.5 billion, using the short-scale billion of a thousand million, with no…
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Ounce to kg converter
Put a US net weight onto an export label or postal form: 16 ounces are exactly 0.45359237 kilograms, because the ounce is a fixed sixteenth of the international…
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Ounces to pounds converter
Read a kitchen-scale or parcel-ticket weight in pounds: a 48-ounce bag is exactly 3 pounds and a 16-ounce box is 1 pound, because the avoirdupois pound holds…
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Oz to cc converter
Turn a US fluid-ounce volume into the cc marked on syringes and glassware: 1 fl oz is 29.5735 cc, so a cup of 8 fl oz is 236.588 cc, never a weight ounce or a…
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Pa to PSI converter
Read an SI pressure on a US gauge face: each pascal is 0.000145038 psi, so 1 megapascal comes out as 145.038 psi, and vacuum or differential readings may stay…
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Pascal conversion
Type one pressure in pascals and read it in kilopascals, bar, psi and standard atmospheres at the same time: 101325 Pa is exactly 1 atm, 101.325 kPa and 1.01325…
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Pint to pound converter
One US pint of water weighs about 1.043 pounds, but oil, milk or honey do not: enter the pints and the density of the liquid in g/mL and get its weight in…
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Pints to gallons converter
8 US pints make exactly 1 gallon, so 4 pints are 0.5 gallon and 16 pints are 2 gallons. Turn the pints on a recipe, a dairy sheet or a worksheet into US liquid…
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Pounds and ounces
75 ounces is 4 pounds and 11 ounces, not 4.6875 lb. Enter a total in ounces and get the whole pounds plus the leftover ounces that baby books, shipping labels…
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Pounds to lbs converter
150 pounds is 150 lbs, because pound and lb name the same avoirdupois unit: only the label changes, never the number.
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Pounds to stone converter
140 pounds is exactly 10 stone, because one stone is 14 pounds. Type the pounds from a scale, a fitness app or a weigh-in sheet and get the stone figure British…
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PPM to mg/L converter
For water and dilute water-like samples, 10 ppm is 10 mg/L, because one litre of water weighs one kilogram.
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Pressure unit conversion
1 atm is 14.695948775513 psi and 1 bar is exactly 100 kPa. Convert a reading between any two of Pa, kPa, bar, psi and atm so a datasheet, a gauge and a problem…
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PSI to inches of water conversion
1 psi is 27.7076 inches of water, the conventional factor for a water column near 60 °F printed on many manometer charts.
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Psig to psia converter
100 psig is 114.696 psia: add one conventional atmosphere of 14.696 psi to the gauge reading and you get the absolute pressure that gas-law, boiling-point and…
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Quantity converter
5 feet is 1.524 meters, and asking to turn kilograms into meters gets a refusal instead of a made-up number.
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Quarters to dollars converter
Count your quarters and get the dollar amount straight away: 4 quarters are 1 dollar, 40 quarters are 10 dollars, and the cents and the arithmetic come with…
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Quarts to pounds converter
Enter a volume in US quarts and the liquid's density to get its weight in pounds: 1 quart of water at 1 g/mL weighs about 2.086 pounds, and denser liquids such…
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Radiation converter
Convert radiation readings within the right family: 1 curie is 37 billion becquerels and 1 gray is 100 rad.
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RMS to peak watts converter
Turn an amplifier's RMS rating into the peak figure printed beside it: the converter multiplies by √2, so 50 W RMS is about 70.71 W peak, ready for speaker…
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Roman numerals
Type a whole number from 1 to 3999 and get its standard Roman numeral: 1994 becomes MCMXCIV and 3999 becomes MMMCMXCIX, ready for a title page, an outline or an…
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Scale conversion calculator
Turn a real-world length into its size on a 1:N drawing or model: a 10000 mm wall becomes 200 mm on a 1:50 plan, the same division used for HO trains, die-cast…
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Seconds converter
Enter a duration in seconds and see it in minutes, hours and days at the same time: 90 seconds are 1.5 minutes and 0.025 hours, worked out with exact civil-time…
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Seconds to hours converter
Divide seconds by 3600 and you have hours: 7200 seconds are 2 hours and 1800 seconds are half an hour, with every fraction kept for timers, logs and…
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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