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

Unit Converter

millimeter to centimeter (mm → cm)

Convert millimeter (mm) to centimeter (cm) instantly. 1mm ≈ 0.1cm.

Unit Converter

millimeter to inch (mm → in)

Convert millimeter (mm) to inch (in) instantly. 1mm ≈ 0.03937in.

Unit Converter

centimeter to millimeter (cm → mm)

Convert centimeter (cm) to millimeter (mm) instantly. 1cm ≈ 10mm.

Unit Converter

centimeter to meter (cm → m)

Convert centimeter (cm) to meter (m) instantly. 1cm ≈ 0.01m.

Unit Converter

centimeter to inch (cm → in)

Convert centimeter (cm) to inch (in) instantly. 1cm ≈ 0.393701in.

Unit Converter

meter to centimeter (m → cm)

Convert meter (m) to centimeter (cm) instantly. 1m ≈ 100cm.

Unit Converter

meter to foot (m → ft)

Convert meter (m) to foot (ft) instantly. 1m ≈ 3.28084ft.

Unit Converter

meter to yard (m → yd)

Convert meter (m) to yard (yd) instantly. 1m ≈ 1.093613yd.

Unit Converter

kilometer to mile (km → mi)

Convert kilometer (km) to mile (mi) instantly. 1km ≈ 0.621371mi.

Unit Converter

kilometer to nautical mile (km → nmi)

Convert kilometer (km) to nautical mile (nmi) instantly. 1km ≈ 0.539957nmi.

Unit Converter

inch to millimeter (in → mm)

Convert inch (in) to millimeter (mm) instantly. 1in ≈ 25.4mm.

Unit Converter

inch to centimeter (in → cm)

Convert inch (in) to centimeter (cm) instantly. 1in ≈ 2.54cm.

Unit Converter

foot to meter (ft → m)

Convert foot (ft) to meter (m) instantly. 1ft ≈ 0.3048m.

Unit Converter

yard to meter (yd → m)

Convert yard (yd) to meter (m) instantly. 1yd ≈ 0.9144m.

Unit Converter

mile to kilometer (mi → km)

Convert mile (mi) to kilometer (km) instantly. 1mi ≈ 1.609344km.

Unit Converter

nautical mile to kilometer (nmi → km)

Convert nautical mile (nmi) to kilometer (km) instantly. 1nmi ≈ 1.852km.

Unit Converter

gram to ounce (g → oz)

Convert gram (g) to ounce (oz) instantly. 1g ≈ 0.035274oz.

Unit Converter

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.

Unit Converter

kilogram to gram (kg → g)

Convert kilogram (kg) to gram (g) instantly. 1kg ≈ 1,000g.

Unit Converter

kilogram to tonne (kg → t)

Convert kilogram (kg) to tonne (t) instantly. 1kg ≈ 0.001t.

Unit Converter

kilogram to pound (kg → lb)

Convert kilogram (kg) to pound (lb) instantly. 1kg ≈ 2.204624lb.

Unit Converter

kilogram to stone (kg → st)

Convert kilogram (kg) to stone (st) instantly. 1kg ≈ 0.157473st.

Unit Converter

tonne to kilogram (t → kg)

Convert tonne (t) to kilogram (kg) instantly. 1t ≈ 1,000kg.

Unit Converter

ounce to gram (oz → g)

Convert ounce (oz) to gram (g) instantly. 1oz ≈ 28.3495g.

Unit Converter

pound to kilogram (lb → kg)

Convert pound (lb) to kilogram (kg) instantly. 1lb ≈ 0.453592kg.

Unit Converter

stone to kilogram (st → kg)

Convert stone (st) to kilogram (kg) instantly. 1st ≈ 6.35029kg.

Unit Converter

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.

Unit Converter

Celsius to Fahrenheit (°C → °F)

Convert Celsius (°C) to Fahrenheit (°F) instantly. °C ↔ °F temperature.

Unit Converter

Celsius to Kelvin (°C → K)

Convert Celsius (°C) to Kelvin (K) instantly. °C ↔ K temperature.

Unit Converter

Fahrenheit to Celsius (°F → °C)

Convert Fahrenheit (°F) to Celsius (°C) instantly. °F ↔ °C temperature.

Unit Converter

Kelvin to Celsius (K → °C)

Convert Kelvin (K) to Celsius (°C) instantly. K ↔ °C temperature.

Unit Converter

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.

Unit Converter

square meter to acre (m² → ac)

Convert square meter (m²) to acre (ac) instantly. 1m² ≈ 0.000247ac.

Unit Converter

square meter to hectare (m² → ha)

Convert square meter (m²) to hectare (ha) instantly. 1m² ≈ 0.0001ha.

Unit Converter

square meter to square foot (m² → ft²)

Convert square meter (m²) to square foot (ft²) instantly. 1m² ≈ 10.763915ft².

Unit Converter

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.

Unit Converter

acre to square meter (ac → m²)

Convert acre (ac) to square meter (m²) instantly. 1ac ≈ 4,046.86m².

Unit Converter

hectare to square meter (ha → m²)

Convert hectare (ha) to square meter (m²) instantly. 1ha ≈ 10,000m².

Unit Converter

square foot to square meter (ft² → m²)

Convert square foot (ft²) to square meter (m²) instantly. 1ft² ≈ 0.092903m².

Unit Converter

Milliliters to Cups (mL → cup) — US Legal Cup 240mL

Convert milliliter (mL) to cup (cup) instantly. 1mL ≈ 0.004167cup.

Unit Converter

Milliliters to Tablespoons (mL → tbsp) — US Tablespoon

Convert milliliter (mL) to tablespoon (tbsp) instantly. 1mL ≈ 0.067628tbsp.

Unit Converter

Milliliters to Teaspoons (mL → tsp) — US Teaspoon

Convert milliliter (mL) to teaspoon (tsp) instantly. 1mL ≈ 0.202884tsp.

Unit Converter

milliliter to fluid ounce (mL → fl oz)

Convert milliliter (mL) to fluid ounce (fl oz) instantly. 1mL ≈ 0.033814fl oz.

Unit Converter

liter to gallon (L → gal)

Convert liter (L) to gallon (gal) instantly. 1L ≈ 0.264172gal.

Unit Converter

gallon to liter (gal → L)

Convert gallon (gal) to liter (L) instantly. 1gal ≈ 3.785412L.

Unit Converter

Cups to Milliliters (cup → mL) — US Legal Cup 240mL

Convert cup (cup) to milliliter (mL) instantly. 1cup ≈ 240mL.

Unit Converter

Tablespoons to Milliliters (tbsp → mL) — US Tablespoon

Convert tablespoon (tbsp) to milliliter (mL) instantly. 1tbsp ≈ 14.7868mL.

Unit Converter

Teaspoons to Milliliters (tsp → mL) — US Teaspoon

Convert teaspoon (tsp) to milliliter (mL) instantly. 1tsp ≈ 4.92892mL.

Unit Converter

fluid ounce to milliliter (fl oz → mL)

Convert fluid ounce (fl oz) to milliliter (mL) instantly. 1fl oz ≈ 29.5735mL.

Unit Converter

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.

Unit Converter

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.

Unit Converter

kilometer/hour to mile/hour (km/h → mph)

Convert kilometer/hour (km/h) to mile/hour (mph) instantly. 1km/h ≈ 0.621372mph.

Unit Converter

kilometer/hour to knot (km/h → kn)

Convert kilometer/hour (km/h) to knot (kn) instantly. 1km/h ≈ 0.539958kn.

Unit Converter

mile/hour to kilometer/hour (mph → km/h)

Convert mile/hour (mph) to kilometer/hour (km/h) instantly. 1mph ≈ 1.609343km/h.

Unit Converter

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.

Unit Converter

megabyte to gigabyte (MB → GB)

Convert megabyte (MB) to gigabyte (GB) instantly. 1MB ≈ 0.001GB.

Unit Converter

gigabyte to megabyte (GB → MB)

Convert gigabyte (GB) to megabyte (MB) instantly. 1GB ≈ 1,000MB.

Unit Converter

kilopascal to bar (kPa → bar)

Convert kilopascal (kPa) to bar (bar) instantly. 1kPa ≈ 0.01bar.

Unit Converter

bar to kilopascal (bar → kPa)

Convert bar (bar) to kilopascal (kPa) instantly. 1bar ≈ 100kPa.

Unit Converter

bar to psi (bar → psi)

Convert bar (bar) to psi (psi) instantly. 1bar ≈ 14.503774psi.

Unit Converter

atmosphere to mmHg (atm → mmHg)

Convert atmospheres (atm) to millimeters of mercury (mmHg). One atm is exactly 760mmHg.

Unit Converter

psi to bar (psi → bar)

Convert psi (psi) to bar (bar) instantly. 1psi ≈ 0.068948bar.

Unit Converter

mmHg to atmosphere (mmHg → atm)

Convert mmHg (mmHg) to atmosphere (atm) instantly. 1mmHg ≈ 0.001316atm.

Unit Converter

kilojoule to kilocalorie (kJ → kcal)

Convert kilojoule (kJ) to kilocalorie (kcal) instantly. 1kJ ≈ 0.239006kcal.

Unit Converter

kilocalorie to kilojoule (kcal → kJ)

Convert kilocalorie (kcal) to kilojoule (kJ) instantly. 1kcal ≈ 4.184kJ.

Unit Converter

watt to horsepower (W → hp)

Convert watt (W) to horsepower (hp) instantly. 1W ≈ 0.001341hp.

Unit Converter

kilowatt to horsepower (kW → hp)

Convert kilowatt (kW) to horsepower (hp) instantly. 1kW ≈ 1.341022hp.

Unit Converter

horsepower to watt (hp → W)

Convert horsepower (hp) to watt (W) instantly. 1hp ≈ 745.699872W.

Unit Converter

horsepower to kilowatt (hp → kW)

Convert horsepower (hp) to kilowatt (kW) instantly. 1hp ≈ 0.7457kW.

Unit Converter

newton to kilogram-force (N → kgf)

Convert newton (N) to kilogram-force (kgf) instantly. 1N ≈ 0.101972kgf.

Unit Converter

newton to pound-force (N → lbf)

Convert newton (N) to pound-force (lbf) instantly. 1N ≈ 0.224809lbf.

Unit Converter

kilogram-force to newton (kgf → N)

Convert kilogram-force (kgf) to newton (N) instantly. 1kgf ≈ 9.80665N.

Unit Converter

pound-force to newton (lbf → N)

Convert pound-force (lbf) to newton (N) instantly. 1lbf ≈ 4.448222N.

Unit Converter

degree to radian (° → rad)

Convert degree (°) to radian (rad) instantly. 1° ≈ 0.017453rad.

Unit Converter

radian to degree (rad → °)

Convert radian (rad) to degree (°) instantly. 1rad ≈ 57.29578°.

Unit Converter

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).

Unit Converter

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.

Unit Converter

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).

Unit Converter

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.

Unit Converter

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.

Unit Converter

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.