Conversion Calculators
312 Free Converters
We all use length, weight, temperature, time, speed, and various other quantities in everyday life. Is there a way to convert between units without memorizing them all? Thankfully, yes! From time converters to tools for everyday needs - they work on computer and smartphone so you can use them whenever and wherever you want!
Length and Area Converters
13 converters
Acreage Calculator
Area Converter
Ares to hectares converter
Astronomical Unit Calculator
Decimeter to Meter Converter
Feet and Inches Calculator
Feet to Inches Calculator
Height in Inches Calculator
Inches to Fraction Calculator
Length Converter
Light Year Conversion
Mesh to Micron Converter
Pixels to Inches Converter
Volume and Weight Converters
20 converters
CCF to Gallons Conversion
Cubic Feet Calculator
Cubic Meter Calculator
Cubic Yards to Tons Calculator
Decagram to gram converter
Drops to ml Conversion
oz to Cups Converter
Gallon Calculator
Gallons to Pounds Converter
Grams To Ounces Calculator
kg to Gallons Converter
Liters to Centiliters Converter
mcg to mg Converter
mg to mL Calculator
ml to cups Converter
Pint to Pound Conversion
Pounds and Ounces Calculator
Quarts to Pounds Conversion
Volume Conversion
Weight Converter
Force, Pressure, and Torque Converters
11 converters
Force Converter
Inch-lbs to Nm converter
Inch-Pounds to Foot-Pounds Converter
Lbs to Newtons Converter
Newton Meter Calculator
Nm to ft-lbs Converter
Nm to in-lbs converter
Pressure Conversion
PSI to GPM Calculator
Torque to hp Calculator
Torr to atm Conversion
Earth Measurements Converters
4 converters
Number Converters
9 converters
Billion to Trillion Converter
Cents to Euros Calculator
Crore to Lakh Converter
Crore to Million Converter
Million to Billion Converter
Million to Lakh Converter
Million to Thousand Converter
Number to Billion Converter
Number to Million Converter
Numeral Systems Converters
6 converters
Tech and Electronics Converters
7 converters
Time Converters
5 converters
Other Converters
33 converters
Angle Conversion Calculator
CCF to Therms Calculator
Cents to Dollars Calculator
CGS System of Units Converter
Conversion Calculator
cps Calculator
dBm to Watts Calculator
Density Conversion
Dimensional Analysis Calculator
Dimes to Dollars Calculator
Energy Conversion Calculator
MPG to L/100 km Converter
Grams To Calories Calculator
Hardness Conversion Calculator
Joules to Volts Calculator
Knots to kph Converter
Knots to mph Converter
m/s to km/h Converter
Natural Gas Converter
Nm to Joules Calculator
Nickels to Dollars Calculator
Paper Quantity Converter
Pennies to Dollars Calculator
Power Converter
PPM Calculator
PPM to mg/L Converter
Px to Em Converter
Quantity Converter
Radiation Converter
RMS to Watts Converter
Speed Conversion
Temperature Conversion
Weird Units Converter
Redundant Calculators
204 converters • Similar functionality to other calculators - exist to make them easier to find
Acres to Hectares Converter
Acres to Square Feet Converter
Angstrom to nm converter
ATM Conversion
atm to Pascals Conversion
Barometric Pressure Conversion
Bar To Atm Conversion
bar to psi Conversion
Bar to PSIG Converter
cc to Grams Converter
cc to Liter Converter
cc to ml Converter
cc to oz Converter
Celsius Converter
Celsius to Fahrenheit Converter
Centigrade to Celsius Converter
Centimeter Calculator
Cent to Square Meter Converter
cm Height Conversion Calculator
cm to ft in. converter
cm to in Converter
cm to km Conversion
cm to m Converter
cm to mm Converter
Cubic Feet to Cubic Meters Converter
Cubic Feet to Gallons Converter
Cubic Feet to Pounds Calculator
Cubic Inches to Gallons Converter
Cubic Meter to Ton Converter
Cups to Gallons Converter
Cups to Oz Converter
Cups to Pints Converter
Cups to Quarts Converter
Day Converter
Days to Months Calculator
Days to Weeks Calculator
Days to Years Calculator
Degrees to Minutes Converter
Degrees to Radians Converter
Degrees to Seconds Converter
Distance Converter
dm Converter
Fahrenheit Converter
Fahrenheit to Celsius Converter
Feet converter
Feet to Miles Converter
Feet to Yards Conversion
Fluid Ounces to Pounds Conversion
Foot to Centimeter Converter
ft to m Converter
Gaj to Square Yard Converter
Gallons to Cubic Feet Converter
Gallons to Cups Converter
Gallons to Grams Conversion
Gallons to Pints Converter
Gallons to Quarts Converter
Gallons to Tons Converter
gal to kg Converter
Grams in ml Converter
Grams to fl oz Converter
Gram to Liter Conversion
gr to ml Converter
g to tsp Converter
g to lbs Converter
Hectares to Acres Converter
Height Converter
Hour Converter
Hours to Days Calculator
Hours to Minutes Converter
Hours to Seconds Converter
Hours to Week Conversion
Hours to Years Converter
Imperial Calculator
Imperial to Metric Conversion
Inch Converter
Inches to Yard Conversion
Inch to Meter Calculator
in to cm Converter
Katha to Square Feet Converter
Kelvin Converter
Kelvin to Celsius Converter
Kelvin to Fahrenheit Converter
kg/cm² to psi Converter
kg to lbs Converter
kg to Liter Converter
kg to mL Converter
kg to ounce converter
kg to Stones Converter
Kilometer Calculator
Kilometer to Meter Converter
Kilometers to Miles Calculator
km to Feet Conversion
kPa Converter
kPa to atm Conversion
kPa to mmHg Conversion
kPa to psi Conversion
KSI to MPa Converter
KSI to PSI Conversion
Land Area Calculator
lbs to g Converter
lbs to kg Converter
lbs to Pounds Converter
Lbs to PSI Converter
lbs to Stone Converter
Liters to Pounds Calculator
Liter to cc Converter
Lot Size to Acres Calculator
Lot Size to Square Feet Calculator
l to gal Converter
mcg to mL conversion
Measurement Converter
Meter Converter
Meters to Feet Converter
Meter To Mile Converter
Metric Converter
Metric to Imperial Converter
Metric to Inches Calculator
Metric to SAE Calculator
Metric to Standard Converter
mg to cc Conversion
mg to lbs Converter
mg to tablespoon Converter
mg to teaspoon Converter
Micrometer Converter
micron to mil Conversion Calculator
mil Conversion
Mile Conversion Calculator
Millimeter Calculator
Milliseconds Converter
mil to inch Conversion
mil to mm Conversion
Minute Converter
Minutes to Days Calculator
Minutes to Decimal Calculator
Minutes to Seconds Converter
Minutes to Years Conversion
ml to cc Converter
ml to kg Converter
mL to lbs Conversion
ml to oz Converter
ml to tbsp Converter
ml to tsp Converter
ml to ul Conversion
MmHg to Atm Conversion
mm Calculator
mm to ATM Converter
mm to Foot Converter
mm to Inches Conversion
mm to km Conversion
mm to m Conversion
Months to Years Calculator
MPa Conversion
MPa to PSI Conversion
MPa to psig Conversion
ms to Seconds Converter
m to ft Converter
nm converter
nm to m Converter
Ounces to Grams Converter
Ounces to Pounds Converter
Ounce to kg Converter
oz to cc Converter
Ounces to Milliliters Converter
Pascal Conversion
Pa to psi Converter
Pints to Cups Converter
Pints to Gallons Converter
Pounds to Grams Converter
Pounds to lbs Converter
Pounds to Ounces Converter
Pounds to Stone Converter
Pressure Unit Conversion
PSI Converter
PSIG to PSIA Converter
psi to atm Conversion
psi to Inches of Water Conversion
Quarts to Cups Converter
Quarts to Gallons Converter
Radians to Degrees Converter
Seconds Converter
Seconds to Days Converter
Seconds to Hours Converter
Seconds to Minutes Converter
Seconds to Years Conversion
Square Centimeters To Square Millimeters Converter
Square Feet Converter
Square Feet to Acres Calculator
Square Inch to Square Foot Converter
Square Meter Converter
Square Meters to Square Feet Converter
Square Miles to Square km Converter
Square Yard Converter
Stone to kg Converter
Stone to lbs converter
tbsp to Grams Converter
Tbsp to ml Converter
tsp to grams Converter
tsp to ml Converter
Weeks to Months Calculator
Weeks to Years Converter
Yard Conversion
Yards to Meters Conversion
Yard to Meter Converter
Yard to Mile Converter
Why Use Our Conversion Tools?
Instant
Real-time conversions as you type
Accurate
Precise calculations every time
Universal
All unit systems covered
Mobile Friendly
Works on any device, anywhere
Complete Unit Conversion Toolkit
The multitude of metric systems such as the International System of Units (SI) or the United States customary units (USC) complicates the situation even more. Our conversion calculators solve this problem by providing instant, accurate conversions between any units you need.
From everyday conversions like feet to meters, pounds to kilograms, and Celsius to Fahrenheit, to specialized conversions for scientific, engineering, and technical work - we've got you covered. We also created many unusual calculators, such as the weird units converter that can convert any number to T-rex bite power, or the binary converter that lets you convert between binary and decimal systems.
Common Conversions
- ✓ Length: feet, meters, inches, kilometers
- ✓ Weight: pounds, kilograms, ounces, grams
- ✓ Volume: liters, gallons, cups, milliliters
- ✓ Temperature: Celsius, Fahrenheit, Kelvin
- ✓ Time: seconds, minutes, hours, days
- ✓ Area: square feet, acres, hectares
Specialized Conversions
- ✓ Pressure: PSI, bar, pascal, atmospheres
- ✓ Force & Torque: newtons, pounds-force
- ✓ Data: bytes, KB, MB, GB, TB
- ✓ Speed: mph, km/h, m/s, knots
- ✓ Power: watts, horsepower, kilowatts
- ✓ Energy: joules, calories, BTU
Check out our 312 conversion calculators and make your life easier! Whether you're a student, engineer, scientist, traveler, cook, or DIY enthusiast - these tools will save you time and eliminate conversion errors.
How to Use These Conversion Calculators
Pick the converter that matches your task, enter the value you already know, and let the tool return the unit you need. Each calculator focuses on a specific unit pair so you get instant, accurate outputs without memorizing conversion ratios.
- Select a calculator from the categories above or use the site search.
- Review the input fields and choose the units you have and want.
- Enter the quantity to convert — you can update it at any time.
- Press calculate (or let the auto-calc run) to see the converted result.
- Explore the related tools, tables, and tips shown below each calculator.
Formula
Unit conversions follow straightforward ratios. The calculators apply the correct constant and keep track of unit symbols for you. Here are some of the base formulas used across this category:
- Length: meters = feet × 0.3048
- Area: acres = square feet ÷ 43,560
- Volume: liters = gallons × 3.78541
- Weight: kilograms = pounds ÷ 2.20462
- Temperature: °C = (°F − 32) × 5/9
- Speed: km/h = mph × 1.60934
The interface handles rounding and significant figures, but you can always verify the maths thanks to the constant displayed on each page.
Full Description
ReadyCalculator's conversion suite helps travellers, engineers, students, and DIY makers convert any measurement in seconds. From toggling between imperial and metric systems to translating data units for tech projects, these calculators remove guesswork and reduce errors.
We curate authoritative conversion ratios, document context for each unit pair, and surface related tools so you can keep working without switching tabs. Bookmark your favourite converters and share them with colleagues who rely on consistent unit translations.
Frequently Asked Questions
Are the conversion factors accurate?
Yes. We use official standards (SI, NIST, and industry references) and update factors when global definitions change.
Can I convert between imperial and metric units?
Absolutely. Many calculators default to imperial ↔ metric pairs, and most include dropdowns for alternative unit systems.
Do I need to download an app?
No installation is required. All converters run in the browser and are optimised for desktop and mobile screens.
How do I suggest a new converter?
Use the contact form or feedback link in the footer. Share the units you need and any domain-specific context so we can prioritise it.