Most Used
📏
Length
cm ↔ in · km ↔ mi
m ↔ ft · mm ↔ in
⚖️
Weight
kg ↔ lb · g ↔ oz
kg ↔ st · t ↔ kg
🌡️
Temperature
°C ↔ °F
°C ↔ K · °F ↔ K
💱
Currency
USD · EUR · INR · GBP
59 live currencies
🧪
Volume
L ↔ gal · ml ↔ cups
ml ↔ fl oz · L ↔ ml
🏦
Finance
EMI · Interest · Tax
Savings · Mortgage
Browse All
⬜
Area
m²↔ft² · ha↔ac
💨
Speed
km/h↔mph · kn↔m/s
💾
Data Storage
GB↔MB · TB↔GB
⏱️
Time
hr↔min · days↔wk
🍳
Cooking
cup↔ml · tbsp↔tsp
👟
Shoe Size
US↔EU↔UK
👕
Clothing
US↔EU↔UK
⛽
Fuel
mpg↔L/100km
🔩
Pressure
psi↔bar · atm↔Pa
⚡
Energy
J↔kJ · kWh↔MJ
📐
Angle
deg↔rad · grad↔deg
🔢
Number System
bin↔hex↔dec
🔋
Power
W↔kW · hp↔kW
📡
Frequency
Hz↔kHz · MHz↔GHz
🧱
Density
kg/m³↔g/cm³
🔧
Torque
N·m↔lb·ft
🎨
Color
HEX↔RGB↔HSL
📊
Percentage
% calc
📅
Date
date diff · add days
🧾
Tip
split bill · tip %
🔬
Scientific
sin · cos · log
💻
Binary
bin↔dec↔hex
🏛️
Roman Numerals
XIV↔14
🚀
Acceleration
m/s²↔g
💧
Flow Rate
L/s↔m³/h
💡
Luminance
cd/m²↔nit
🔦
Illuminance
lx↔fc
🌡️
Specific Heat
J/kg·K
♨️
Thermal Cond.
W/m·K
🌊
Kin. Viscosity
m²/s↔St
🫧
Dyn. Viscosity
Pa·s↔cP
🔄
Angular Vel.
rpm↔rad/s
💍
Ring Size
US↔EU↔UK
🔤
Number Words
42→forty two
🌍
Time Zone
IST↔UTC↔EST
⌨️
ASCII Table
char↔code
🖌️
HTML Colors
#hex · rgb
🎓
GPA
grade calc
📈
SIP
monthly invest
🏦
FD
fixed deposit
🪙
PPF
15yr returns
🧾
Income Tax
tax calc
🏠
Mortgage
home loan
✍️
Text Tools
case · count
🧮
All Calculators
50+ calculators
Most Popular Conversions
📏 Centimeter → Inch ⚖️ Kilogram → Pound 🌡️ Celsius → Fahrenheit 📏 Kilometer → Mile ⚖️ Pound → Kilogram 🌡️ Fahrenheit → Celsius 📏 Meter → Foot 💨 Kilometer per Hour → Mile per Hour 💾 Gigabyte → Megabyte 🔋 Kilowatt → Horsepower (mech) ⬜ Acre → Square Meter 🔩 PSI → Bar ⏱️ Hour → Minute ⚡ BTU → Kilojoule

About Unitafy

Unitafy is a free, comprehensive unit conversion tool covering 51 categories and hundreds of unit pairs. From everyday conversions like cm to inches or kg to lbs, to technical conversions for engineering and science — all handled instantly in your browser.

All conversions use accurate factors from the International System of Units (SI). No signup required. Works offline once loaded.

Conversion Guides
Weight
How to Convert kg to lbs
Formula, quick reference table and examples →
Temperature
Celsius to Fahrenheit Guide
Formula, mental math tricks and reference points →
Numbers
Lakh, Crore, Million, Billion Guide
Indian vs international number systems explained →
Length
Metric vs Imperial — Complete Guide
Which countries use which and how to convert →