Type a sum, a unit or currency conversion, a percentage or a date question in plain words. You get the answer, how it was understood and the working as you type.
Plus about 160 currencies with daily reference rates. Spelling variants, plurals and symbols all work: metre or meter, ft or feet, °C or celsius.
nanometres (nm), micrometres (µm), millimetres (mm), centimetres (cm), decimetres (dm), metres (m), kilometres (km), thou (mil), inches (in), hands (hand), feet (ft), yards (yd), chains (ch), furlongs (furlong), miles (mi), nautical miles (nmi), astronomical units (au), light years (ly)
micrograms (µg), milligrams (mg), carats (ct), grams (g), grains (gr), tolas (tola), ounces (oz), troy ounces (oz t), pounds (lb), kilograms (kg), stone (st), quintals (q), tonnes (t), US short tons (US ton), UK long tons (UK ton)
degrees Celsius (°C), degrees Fahrenheit (°F), kelvins (K), degrees Rankine (°R)
millilitres (mL), centilitres (cL), decilitres (dL), litres (L), hectolitres (hL), cubic metres (m³), cubic centimetres (cm³), cubic inches (in³), cubic feet (ft³), cubic yards (yd³), US teaspoons (tsp), US tablespoons (tbsp), US fluid ounces (US fl oz), US cups (cup), metric cups (metric cup), US pints (US pt), US quarts (US qt), US gallons (US gal), UK fluid ounces (UK fl oz), UK cups (UK cup), UK pints (UK pt), UK quarts (UK qt), UK gallons (UK gal), oil barrels (bbl)
square millimetres (mm²), square centimetres (cm²), square metres (m²), ares (a), hectares (ha), square kilometres (km²), square inches (in²), square feet (ft²), square yards (yd²), acres (ac), square miles (mi²), marlas (272.25 sq ft) (marla), marlas (225 sq ft) (marla), kanals (5,445 sq ft) (kanal), kanals (4,500 sq ft) (kanal)
metres per second (m/s), kilometres per hour (km/h), feet per second (ft/s), miles per hour (mph), knots (kn)
nanoseconds (ns), microseconds (µs), milliseconds (ms), seconds (s), minutes (min), hours (h), days (d), weeks (wk), fortnights (fortnight), months (mo), years (yr), decades (decade), centuries (century)
bits (bit), bytes (B), kilobits (kb), kilobytes (kB), megabits (Mb), megabytes (MB), gigabits (Gb), gigabytes (GB), terabits (Tb), terabytes (TB), petabytes (PB), kibibytes (KiB), mebibytes (MiB), gibibytes (GiB), tebibytes (TiB)
bits per second (bit/s), kilobits per second (kbit/s), megabits per second (Mbit/s), gigabits per second (Gbit/s), kilobytes per second (kB/s), megabytes per second (MB/s), gigabytes per second (GB/s), mebibytes per second (MiB/s)
pascals (Pa), hectopascals (hPa), kilopascals (kPa), megapascals (MPa), millibars (mbar), bars (bar), atmospheres (atm), pounds per square inch (psi), kilopounds per square inch (ksi), millimetres of mercury (mmHg), inches of mercury (inHg), torr (Torr)
electronvolts (eV), joules (J), kilojoules (kJ), megajoules (MJ), calories (cal), kilocalories (kcal), watt hours (Wh), kilowatt hours (kWh), megawatt hours (MWh), British thermal units (BTU), foot-pounds (ft·lbf)
watts (W), kilowatts (kW), megawatts (MW), horsepower (hp), metric horsepower (PS), BTU per hour (BTU/h)
radians (rad), degrees (°), gradians (grad), arcminutes (arcmin), arcseconds (arcsec), turns (turn)
kilometres per litre (km/L), litres per 100 km (L/100 km), miles per US gallon (mpg (US)), miles per UK gallon (mpg (UK))
Plain questions with numbers: unit conversions such as “5 ft 7 in to cm”, currency such as “100 usd to pkr”, percentages such as “18% of 2400”, date questions such as “90 days from today”, and maths such as “(3+4)^2/7”. Lakh, crore, million and k are understood, so “1.5 lakh km in miles” works.
Each unit is built from its legal definition, for example 1 inch = 0.0254 m and 1 pound = 0.45359237 kg exactly. Results show up to seven significant figures and the working lists the factor used. Units with more than one local definition, such as the marla or the gallon, say so and offer the alternatives.
Mid-market reference rates from Exchange Rate API, refreshed once a day on our server. Each answer shows the date of the rates. Banks, cards and money changers add a margin, so the amount you receive will be lower.
The box picks the most common reading and offers the others as buttons. For example “oz” is a weight ounce unless you convert it to a volume, “gallon” is a US gallon with the UK gallon one tap away, and “Rs” follows your region.
No. Questions are answered in your browser. The only request the page makes is for the daily exchange-rate table, from this site, and only when you ask about money.
Adding months keeps the day of the month where it can. When that day does not exist, such as 31 January plus one month, the result moves back to the last day of the month and the working says so.