Unit converters

Convert between any units of length, weight, temperature, area, volume, speed, energy, force, pressure, density, computer storage and more. Instant bidirectional results.

47 converters
Length, area & volume
📏Length Popular
cm, m, feet, inches, km, miles and more.
🗺️Area
sqft, sqm, acres, hectares, and more.
🧪Volume
Litres, gallons, ml, cups, cubic metres.
📏Height New
cm, m, feet and inches in any direction.
🍳Cooking New
Cups, tbsp, tsp, fl oz, ml, l (US, UK, metric).
📏Meters → feet New
m to ft and ft + inches breakdown.
📏Height ft & in → cm New
Imperial body height to centimetres.
📏Height cm → ft & in New
Metric body height to feet + inches.
📦ft³ → yd³ New
Concrete, mulch, gravel volumes.
📦yd³ → ft³ New
Bulk-material conversions.
Weight & mass
🏋️Weight
kg, lb, oz, g, stones, tonnes.
⚖️Avoirdupois weight New
Everyday US/UK system: oz, lb, stone, ton, dram, grain.
🥇Troy weight New
Precious-metal units: troy ounce, pennyweight, grain.
⚖️kg → lb New
Quick metric-to-imperial weight.
⚖️lb → kg New
Quick imperial-to-metric weight.
Temperature
🌡️Temperature (4-way)
°C, °F, K, °R with formula reference.
🌡️Celsius → Fahrenheit
°C to °F.
🌡️Celsius → Kelvin New
°C to K.
🌡️Celsius → Rankine New
°C to °R.
🌡️Fahrenheit → Celsius
°F to °C.
🌡️Fahrenheit → Kelvin New
°F to K.
🌡️Fahrenheit → Rankine New
°F to °R.
🌡️Kelvin → Celsius New
K to °C.
🌡️Kelvin → Fahrenheit New
K to °F.
🌡️Kelvin → Rankine New
K to °R.
Numbers & numerals
%Fraction → Percent New
Convert any fraction (proper, improper, mixed) to a percentage and decimal.
ⅧRoman numeral New
Number ↔ Roman numeral, with breakdown.
📅Roman numeral date New
Convert a date into Roman numerals — for tattoos, monuments, plaques.
ⅧRoman calculator New
Add, subtract, multiply, divide Roman numerals.
Time
🌐Time zones
Convert between world time zones.
⏱️Time units New
ns, ms, s, min, h, day, week, year.
⏱️Minutes → decimal hours New
For timesheets and billing — 90 → 1.5 h.
⏱️Minutes → h and min New
90 → 1 h 30 min, with h:mm output.
Physics & engineering
🏎️Speed
km/h, mph, knots, m/s, ft/s.
🚀Acceleration New
m/s², ft/s², g, gal, km/h/s.
💪Force New
N, kgf, lbf, dyne, ton-force.
⚡Energy & work New
J, kJ, kcal, kWh, BTU, foot-pound.
⚡Power & heat flow New
W, kW, HP, BTU/h, refrigeration ton.
🎈Pressure New
Pa, kPa, bar, atm, psi, mmHg, torr.
🧪Density New
kg/m³, g/cm³, lb/ft³, lb/in³.
🚀Momentum New
kg·m/s, lb·ft/s, N·s.
Math & angles
📐Metric units (SI prefix) New
kilo, mega, micro, nano — for any base unit.
📐Angular units New
Degrees, radians, gradians, turns, arcseconds.
🧭Decimal degrees ↔ DMS New
Latitude / longitude DD ↔ ° ′ ″.
Computer & data
💾Bits & bytes New
bit, byte, kb, MB, Gb, TB — decimal & binary.
💽Computer storage New
Disk capacity in KB / MB / GB / TB / PB.
Money
💱Currency
Major world currencies — approximate rates.

About unit converters

Every converter on this page performs instant, bidirectional conversions. Enter a value in any unit and see all other units update in real time. No buttons to press, no page reloads.

Which converter should I use?

  • Cooking or baking? Use volume for cups-to-ml and weight for grams-to-ounces.
  • Travelling abroad? Use temperature for weather, length for miles-to-km, and currency for exchange rates.
  • Real estate? Use area for sqft-to-sqm or acres-to-hectares.

Common questions

Are these conversions accurate?

Yes. All conversions use exact mathematical ratios defined by international standards (SI, imperial). Currency rates are approximate and may differ from live market rates.

Do I need to press a button to convert?

No. All converters update instantly as you type. Enter a value in any field and the rest update automatically.

Can I convert between metric and imperial?

Yes. Every converter supports both metric and imperial units, plus many additional regional units.

Other categories

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