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.
Newtons to pounds-force converter
Read an SI force against a US load rating: 1 newton is 0.2248089431 pounds-force, found by dividing by the exact 4.4482216152605 newtons in one pound-force…
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Number density converter
Move a particle count per volume between textbook, lab and datasheet units: 1000000 per cubic meter is exactly 1 per cubic centimeter, and all nine units pass…
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Octave band frequency converter
See a frequency on every log scale at once: 1000 Hz above a 1 Hz reference is exactly 3 decades, about 9.965784284662 octaves and 119.589411415945 semitones…
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Osmolarity converter
Line up a lab panel with a textbook value: 300 mOsm/L is 0.3 Osm/L, and every answer also comes in micro-osmoles per liter and osmoles per cubic meter, using…
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Ounces to cups converter
Turn the fluid ounces on a drink label or measuring cup into recipe cups: 8 fl oz is exactly 1 cup and 16 fl oz is 2 cups, because the US cup is defined as…
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Ounces to grams converter
Turn the ounces on a US package or portion card into grams: 1 ounce is exactly 28.349523125 g and 16 ounces are 453.59237 g, so labels and lab records match…
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Ounces to lbs converter
Move a weight from the ounce scale to pounds for a carrier form or a warehouse manifest: 16 ounces are exactly 1 pound, so the converter divides by 16 with no…
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Particle fluence converter
One particle per square centimetre is 10000 per square metre. Convert fluence between nine units, from per barn and per square fermi to per square inch, always…
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Nominal pipe size converter
A 2-inch pipe, NPS 2, is DN 50 with an outside diameter of 2.375 in, or 60.3 mm. Look up any of the 34 chart sizes by NPS, DN or measured outside diameter…
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Plato & specific gravity converter
12 degrees Plato is a specific gravity of about 1.048, or 48 Oechsle and gravity points. Move between Plato, SG, Brix, Balling, Oechsle and points for wort…
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Pounds-force to newtons converter
One pound-force is exactly 4.448221615261 newtons: the weight of a 0.45359237 kg pound under standard gravity of 9.80665 m/s².
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Pounds to grams converter
One pound is exactly 453.59237 grams, so 2 pounds are 907.18474 g. Turn the pounds on a US package, a scale or a shipping quote into grams for labels, customs…
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PSI to ATM converter
1 psi is 0.06804596391 standard atmospheres, taken from the exact definitions of the atmosphere and the pound-force per square inch.
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PSI to kPa converter
1 psi is 6.894757293168 kPa, so a tyre placard, an air-tool rating or a compressor cut-in setpoint in psi reaches a metric datasheet with the exact figure…
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Quarts to cups converter
Multiply quarts by 4 and you have cups: 1 US liquid quart is exactly 4 cups and 2.5 quarts are 10 cups, so scaling a recipe, a drink batch or a prep sheet takes…
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Radiant intensity converter
Switch power per solid angle between six units: 1 W/sr is 1000 mW/sr, and square-degree values use the exact solid-angle bridge, so laser datasheets…
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Reactive power converter
Convert reactive power ratings with exact SI prefixes: 1 Mvar is exactly 1000 kvar, so transmission bank schedules, nameplates in kvar and capacitor datasheets…
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Magnetic reluctance converter
Convert magnetic reluctance across nine units, from inverse henries and ampere-turns per weber to the CGS gilbert per maxwell: 1 H⁻¹ is exactly 1 At/Wb, so core…
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RPM to Hz converter
Turn a motor, fan or spindle speed in RPM into hertz: 60 RPM is exactly 1 Hz, and you also get revolutions per second, the time of one turn and the angular…
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Shore hardness converter
Translate a durometer reading between seven Shore scales: 70 Shore A is about 29 Shore D, read from a fixed elastomer table with Shore A in the middle, so mixed…
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Square meters to square feet
One square foot is exactly 0.09290304 m², so 1 m² comes to 10.76391041671 ft². Turn a floor plan, a room or a lot from square metres into the square feet used…
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Square miles to acres converter
One square mile is exactly 640 acres, not the rough 600 of mental shortcuts. Convert county, park, ranch or wildfire areas from square miles into the acres used…
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Surface density converter
2.5 kg/m² is 73.733811704108 oz/yd². Convert mass per area between kg/m², gsm, g/cm², mg/m², and ounces or pounds per square yard or foot for coating sheets…
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Tablespoons to cups converter
16 US tablespoons make exactly 1 cup, so cups are simply tablespoons divided by 16. Scale spoon measures from a recipe card, a meal-prep plan or a bakery batch…
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Teaspoons to tablespoons converter
3 teaspoons make exactly 1 tablespoon, so 6 teaspoons are 2 tablespoons. Turn the teaspoon counts in a recipe, a spice note or a package dosing guide into…
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Thermal diffusivity converter
1 m²/s is 10,000 cm²/s. Convert a thermal diffusivity (α) between eight metric and US units, from mm²/s to ft²/h, with exact area and time factors, while you…
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Temperature gradient converter
0.03 K/m is 0.0164592 °F/ft. Convert a temperature gradient between kelvin, Celsius, Fahrenheit and Rankine per meter, foot, inch, centimeter, millimeter or…
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Therms to kWh converter
1 therm is 29.307107017222 kWh. Turn the gas energy on a North American bill into the kilowatt-hours of an electricity meter with the exact factor instead of…
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Troy ounces to grams converter
1 troy ounce is exactly 31.1034768 g. Turn the troy-ounce weight of gold, silver or platinum into grams for bullion invoices, assay certificates, jewellery…
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Twip converter
1,440 twips are 72 points, exactly one inch. Convert Word and RTF layout sizes in twips to points, CSS pixels, inches, millimetres, centimetres, picas or OOXML…
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Valve flow coefficient converter
100 Cv equals 86.5 Kᵥ. Convert a valve flow coefficient between the US Cv, the metric Kᵥ, Av and flow factor with fixed IEC factors, so two valve catalogs can…
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Volume charge density converter
Translate charge spread through a volume between ten units: 1 C/m³ is 0.000001 C/cm³, and every value passes through coulombs per cubic metre so the result…
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VSWR return loss converter
Enter one reading and get the whole mismatch picture: a VSWR of 1.5 means a reflection coefficient of 0.2, 4 % of the power reflected and a return loss of…
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Watt-hours to joules converter
One watt-hour is exactly 3600 joules, and this converter applies that full factor to battery capacities, meter readings and lab figures instead of a rounded…
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Watts to horsepower converter
One mechanical horsepower is 745.69987158227022 watts, and this converter divides by that full constant instead of a rounded shortcut, so motor, pump and…
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Yards to feet converter
Multiply yards by exactly three to get feet: 10 yards are 30 feet, with no survey approximation and no metric detour.
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Caballería area converter
One Cuban caballería is about 134200 square meters, or 13.42 hectares. Pick the country variant, enter the number of caballerías and get the area in square…
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Cantaro / kantar mass converter
One Genoa cantaro weighs 47.65 kilograms. Pick the Mediterranean port variant, Valencia and the Egyptian kantar included, enter how many you have and get the…
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Chinese chi/cun length converter
One chi is a third of a metre: 33.333333 cm with six decimals. Enter a length in chi and see it in metres, centimetres, millimetres and inches, plus the…
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cmH₂O pressure converter
10 cmH₂O are 980.67 Pa, 9.81 hPa, 7.36 mmHg and 3.94 inH₂O: type a clinical airway pressure in centimetres of water and read all four units side by side…
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Dirham (mass) converter
One classic dirham weighs 2.975 grams. Convert this historical Islamic unit of mass, not the modern currency, into grams, grains and mithqals, choosing the…
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Fanegada area converter
One fanegada of Castile is about 6439.5 m², or 0.644 hectares and 1.5912 acres. Pick your region's variant, because the fanegada is not the same size…
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Firkin (beer) volume converter
One firkin, the classic UK beer cask, holds 9 imperial gallons: 40.9148 litres or about 10.8085 US gallons.
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Geologic rate converter
Put a geologic rate into the unit your source uses: 10 mm per year is 1 cm per year or 0.3937 inches per year.
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Mithqal mass converter
Convert mithqal to grams with a documented constant: one classic mithqal is 4.25 g, which is 4250 mg or about 0.1366 troy ounces, and an Ottoman option uses 4.8…
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Newton temperature scale converter
Read a temperature given in degrees Newton on the scales you know: 33 °N, where water boils, is 100 °C, 212 °F and 373.15 K, and all three results appear…
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Parasang / farsakh converter
One parasang, or farsakh, is 6 km in the default metric table, about 3.728 miles; switch to the historic 5.5 km or 5.6 km tables when your source uses them.
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French toise length converter
1 toise is 1.94903631 m, or 6 pieds de roi, 72 pouces and 864 lignes. Turn a length from a historical French source into metric and imperial units in one step…
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Look up paper size dimensions in mm and inches
Type a paper name and get its exact size in millimetres and inches: A4 is 210 by 297 mm, Letter is 8.5 by 11 inches.
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Convert shoe size between US, UK, and EU regions
Get all three labels for one adult shoe size at once: a men’s US 9 is a UK 8 and an EU 42.5. Pick the system printed on the box and men or women, and half sizes…
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Convert bra size between US, UK and EU regions
A US 34DD is a 75E in EU sizing and stays 34DD in the UK: enter one full size with the system printed on the label and get all three regional labels from a…
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Convert clothing sizes between US, UK and EU regions
A women's US 8 is a UK 12 and an EU 38: enter a numeric size, its region and women or men, and get all three regional sizes from the same row of a standard…
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Convert data storage units
One KB is 1,000 bytes but one KiB is 1,024, and the gap grows with every step up to TB. Pick the unit you have and the one you need, and the exact byte count is…
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Convert fuel efficiency units
30 US MPG is just under 8 L/100km and more than 12 km/L: enter one figure with its unit and get all four, with US and imperial gallons kept apart and the…
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Convert ring size between regions
See one ring size in all three systems at once: US size 7 is UK O and EU 54, an inner circumference of 54 mm.
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Convert a date to Roman numeral format for tattoos and engravings
Get a Roman numeral date you can engrave with confidence: 25 July 2026 becomes XXV-VII-MMXXVI in day-month-year order.
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Convert tire pressure units between PSI, bar, and kPa
Enter one tire pressure and see it in all three units: 35 PSI equals 2.413165 bar and 241.316505 kPa.
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Data rate unit converter
Convert data rates without mixing up bits and bytes: 100 Mbps is 12.5 MB/s, and every result says whether decimal or binary prefixes were used.
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SI vs IEC byte converter
Translate between the GB printed on the box and the GiB your system shows: 1000 GB is about 931.32 GiB, a gap of about 6.87 %, and no capacity is missing.
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Acres to square miles converter
640 acres make exactly one square mile, so this converter divides your acreage by 640 and turns farm, ranch or parcel figures into the square-mile scale used…
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