Unit Converter tools
Convert high-intent units such as length, weight, temperature, area and data size with formulas and reference tables on each page.
Popular unit converters
millimeter to centimeter (mm → cm)
Convert millimeter (mm) to centimeter (cm) instantly. 1mm ≈ 0.1cm.
millimeter to inch (mm → in)
Convert millimeter (mm) to inch (in) instantly. 1mm ≈ 0.03937in.
centimeter to millimeter (cm → mm)
Convert centimeter (cm) to millimeter (mm) instantly. 1cm ≈ 10mm.
centimeter to meter (cm → m)
Convert centimeter (cm) to meter (m) instantly. 1cm ≈ 0.01m.
centimeter to inch (cm → in)
Convert centimeter (cm) to inch (in) instantly. 1cm ≈ 0.393701in.
meter to centimeter (m → cm)
Convert meter (m) to centimeter (cm) instantly. 1m ≈ 100cm.
meter to foot (m → ft)
Convert meter (m) to foot (ft) instantly. 1m ≈ 3.28084ft.
meter to yard (m → yd)
Convert meter (m) to yard (yd) instantly. 1m ≈ 1.093613yd.
kilometer to mile (km → mi)
Convert kilometer (km) to mile (mi) instantly. 1km ≈ 0.621371mi.
kilometer to nautical mile (km → nmi)
Convert kilometer (km) to nautical mile (nmi) instantly. 1km ≈ 0.539957nmi.
inch to millimeter (in → mm)
Convert inch (in) to millimeter (mm) instantly. 1in ≈ 25.4mm.
inch to centimeter (in → cm)
Convert inch (in) to centimeter (cm) instantly. 1in ≈ 2.54cm.
foot to meter (ft → m)
Convert foot (ft) to meter (m) instantly. 1ft ≈ 0.3048m.
yard to meter (yd → m)
Convert yard (yd) to meter (m) instantly. 1yd ≈ 0.9144m.
mile to kilometer (mi → km)
Convert mile (mi) to kilometer (km) instantly. 1mi ≈ 1.609344km.
nautical mile to kilometer (nmi → km)
Convert nautical mile (nmi) to kilometer (km) instantly. 1nmi ≈ 1.852km.
gram to ounce (g → oz)
Convert gram (g) to ounce (oz) instantly. 1g ≈ 0.035274oz.
Grams to Don (g → 돈) — Korean Gold Weight Unit
Convert grams to don, the Korean precious-metal unit. 3.75g equals exactly one don; 1g is about 0.266667 don.
kilogram to gram (kg → g)
Convert kilogram (kg) to gram (g) instantly. 1kg ≈ 1,000g.
kilogram to tonne (kg → t)
Convert kilogram (kg) to tonne (t) instantly. 1kg ≈ 0.001t.
kilogram to pound (kg → lb)
Convert kilogram (kg) to pound (lb) instantly. 1kg ≈ 2.204624lb.
kilogram to stone (kg → st)
Convert kilogram (kg) to stone (st) instantly. 1kg ≈ 0.157473st.
tonne to kilogram (t → kg)
Convert tonne (t) to kilogram (kg) instantly. 1t ≈ 1,000kg.
ounce to gram (oz → g)
Convert ounce (oz) to gram (g) instantly. 1oz ≈ 28.3495g.
pound to kilogram (lb → kg)
Convert pound (lb) to kilogram (kg) instantly. 1lb ≈ 0.453592kg.
stone to kilogram (st → kg)
Convert stone (st) to kilogram (kg) instantly. 1st ≈ 6.35029kg.
Don to Grams (돈 → g) — Korean Gold Weight Unit
Convert don, the Korean precious-metal weight unit, to grams. One don is exactly 3.75g; ten don (one nyang) is 37.5g.
Celsius to Fahrenheit (°C → °F)
Convert Celsius (°C) to Fahrenheit (°F) instantly. °C ↔ °F temperature.
Celsius to Kelvin (°C → K)
Convert Celsius (°C) to Kelvin (K) instantly. °C ↔ K temperature.
Fahrenheit to Celsius (°F → °C)
Convert Fahrenheit (°F) to Celsius (°C) instantly. °F ↔ °C temperature.
Kelvin to Celsius (K → °C)
Convert Kelvin (K) to Celsius (°C) instantly. K ↔ °C temperature.
Square Meters to Pyeong (m² → 평) — Korean Area Converter
Convert square meters to Korean pyeong. One square meter is exactly 0.3025 pyeong; an 84 m² apartment is about 25.41 pyeong.
square meter to acre (m² → ac)
Convert square meter (m²) to acre (ac) instantly. 1m² ≈ 0.000247ac.
square meter to hectare (m² → ha)
Convert square meter (m²) to hectare (ha) instantly. 1m² ≈ 0.0001ha.
square meter to square foot (m² → ft²)
Convert square meter (m²) to square foot (ft²) instantly. 1m² ≈ 10.763915ft².
Pyeong to Square Meters (평 → m²) — Korean Apartment Size
Convert Korean pyeong to square meters. One pyeong is 400/121 m² ≈ 3.3058 m²; a 34-pyeong apartment is about 112.4 m².
acre to square meter (ac → m²)
Convert acre (ac) to square meter (m²) instantly. 1ac ≈ 4,046.86m².
hectare to square meter (ha → m²)
Convert hectare (ha) to square meter (m²) instantly. 1ha ≈ 10,000m².
square foot to square meter (ft² → m²)
Convert square foot (ft²) to square meter (m²) instantly. 1ft² ≈ 0.092903m².
Milliliters to Cups (mL → cup) — US Legal Cup 240mL
Convert milliliter (mL) to cup (cup) instantly. 1mL ≈ 0.004167cup.
Milliliters to Tablespoons (mL → tbsp) — US Tablespoon
Convert milliliter (mL) to tablespoon (tbsp) instantly. 1mL ≈ 0.067628tbsp.
Milliliters to Teaspoons (mL → tsp) — US Teaspoon
Convert milliliter (mL) to teaspoon (tsp) instantly. 1mL ≈ 0.202884tsp.
milliliter to fluid ounce (mL → fl oz)
Convert milliliter (mL) to fluid ounce (fl oz) instantly. 1mL ≈ 0.033814fl oz.
liter to gallon (L → gal)
Convert liter (L) to gallon (gal) instantly. 1L ≈ 0.264172gal.
gallon to liter (gal → L)
Convert gallon (gal) to liter (L) instantly. 1gal ≈ 3.785412L.
Cups to Milliliters (cup → mL) — US Legal Cup 240mL
Convert cup (cup) to milliliter (mL) instantly. 1cup ≈ 240mL.
Tablespoons to Milliliters (tbsp → mL) — US Tablespoon
Convert tablespoon (tbsp) to milliliter (mL) instantly. 1tbsp ≈ 14.7868mL.
Teaspoons to Milliliters (tsp → mL) — US Teaspoon
Convert teaspoon (tsp) to milliliter (mL) instantly. 1tsp ≈ 4.92892mL.
fluid ounce to milliliter (fl oz → mL)
Convert fluid ounce (fl oz) to milliliter (mL) instantly. 1fl oz ≈ 29.5735mL.
meter/second to kilometer/hour (m/s → km/h)
Convert meters per second (m/s) to kilometers per hour (km/h). One m/s is exactly 3.6km/h.
kilometer/hour to meter/second (km/h → m/s)
Convert kilometer/hour (km/h) to meter/second (m/s) instantly. 1km/h ≈ 0.277778m/s.
kilometer/hour to mile/hour (km/h → mph)
Convert kilometer/hour (km/h) to mile/hour (mph) instantly. 1km/h ≈ 0.621372mph.
kilometer/hour to knot (km/h → kn)
Convert kilometer/hour (km/h) to knot (kn) instantly. 1km/h ≈ 0.539958kn.
mile/hour to kilometer/hour (mph → km/h)
Convert mile/hour (mph) to kilometer/hour (km/h) instantly. 1mph ≈ 1.609343km/h.
knot to kilometer/hour (kn → km/h)
Convert knots (kn) to kilometers per hour (km/h). One knot is exactly 1.852km/h — one nautical mile per hour.
megabyte to gigabyte (MB → GB)
Convert megabyte (MB) to gigabyte (GB) instantly. 1MB ≈ 0.001GB.
gigabyte to megabyte (GB → MB)
Convert gigabyte (GB) to megabyte (MB) instantly. 1GB ≈ 1,000MB.
kilopascal to bar (kPa → bar)
Convert kilopascal (kPa) to bar (bar) instantly. 1kPa ≈ 0.01bar.
bar to kilopascal (bar → kPa)
Convert bar (bar) to kilopascal (kPa) instantly. 1bar ≈ 100kPa.
bar to psi (bar → psi)
Convert bar (bar) to psi (psi) instantly. 1bar ≈ 14.503774psi.
atmosphere to mmHg (atm → mmHg)
Convert atmospheres (atm) to millimeters of mercury (mmHg). One atm is exactly 760mmHg.
psi to bar (psi → bar)
Convert psi (psi) to bar (bar) instantly. 1psi ≈ 0.068948bar.
mmHg to atmosphere (mmHg → atm)
Convert mmHg (mmHg) to atmosphere (atm) instantly. 1mmHg ≈ 0.001316atm.
kilojoule to kilocalorie (kJ → kcal)
Convert kilojoule (kJ) to kilocalorie (kcal) instantly. 1kJ ≈ 0.239006kcal.
kilocalorie to kilojoule (kcal → kJ)
Convert kilocalorie (kcal) to kilojoule (kJ) instantly. 1kcal ≈ 4.184kJ.
watt to horsepower (W → hp)
Convert watt (W) to horsepower (hp) instantly. 1W ≈ 0.001341hp.
kilowatt to horsepower (kW → hp)
Convert kilowatt (kW) to horsepower (hp) instantly. 1kW ≈ 1.341022hp.
horsepower to watt (hp → W)
Convert horsepower (hp) to watt (W) instantly. 1hp ≈ 745.699872W.
horsepower to kilowatt (hp → kW)
Convert horsepower (hp) to kilowatt (kW) instantly. 1hp ≈ 0.7457kW.
newton to kilogram-force (N → kgf)
Convert newton (N) to kilogram-force (kgf) instantly. 1N ≈ 0.101972kgf.
newton to pound-force (N → lbf)
Convert newton (N) to pound-force (lbf) instantly. 1N ≈ 0.224809lbf.
kilogram-force to newton (kgf → N)
Convert kilogram-force (kgf) to newton (N) instantly. 1kgf ≈ 9.80665N.
pound-force to newton (lbf → N)
Convert pound-force (lbf) to newton (N) instantly. 1lbf ≈ 4.448222N.
degree to radian (° → rad)
Convert degree (°) to radian (rad) instantly. 1° ≈ 0.017453rad.
radian to degree (rad → °)
Convert radian (rad) to degree (°) instantly. 1rad ≈ 57.29578°.
kilometer per liter to liters per 100km (km/L → L/100km)
Convert km/L fuel economy (Korea, Japan) to L/100km (Europe). The units are reciprocal: L/100km = 100 ÷ (km/L).
kilometer per liter to miles per gallon (US) (km/L → mpg)
Convert kilometer per liter (km/L) to miles per gallon (US) (mpg) instantly. 1km/L ≈ 2.352146mpg.
liters per 100km to kilometer per liter (L/100km → km/L)
Convert L/100km fuel economy (Europe) to km/L (Korea, Japan). The units are reciprocal: km/L = 100 ÷ (L/100km).
miles per gallon (US) to kilometer per liter (mpg → km/L)
Convert miles per gallon (US) (mpg) to kilometer per liter (km/L) instantly. 1mpg ≈ 0.425144km/L.
megabit per second to megabyte per second (Mbps → MB/s)
Convert megabit per second (Mbps) to megabyte per second (MB/s) instantly. 1Mbps ≈ 0.125MB/s.
megabyte per second to megabit per second (MB/s → Mbps)
Convert megabyte per second (MB/s) to megabit per second (Mbps) instantly. 1MB/s ≈ 8Mbps.
FAQ
What standards do the conversions use?
Conversions use SI units and published conversion factors, with formulas and reference tables shown on each page.
Are reverse converters available?
Yes. Major converters are linked in both directions, such as cm to inch and inch to cm.
Are Korean units like pyeong and don supported?
Yes. Customary Korean units such as pyeong to square meters and don to grams are covered with exact conversion factors.
Is my input sent to a server?
No. Every conversion runs instantly inside your browser and nothing is sent to a server.