Conversion Calculators76 calculators
Unit conversions are part of daily life in many fields. This set of calculators covers everything from length, weight, and volume to currency changes or temperature shifts. Students working on science problems, professionals handling different measurement systems, and travelers sorting out miles and kilometers can all find what they need. The tools offer a clear and practical way to convert values without memorizing complex formulas or hunting for conversion charts. Whether the task is converting euros to dollars, kilograms to pounds, or Fahrenheit to Celsius, a few quick entries will provide an answer you can trust.
Data
Electrical
Electrical Unit Converter
Convert between volts, amps, ohms, watts, and calculate electrical relationships using Ohm's Law.
Watts to Amps Converter
Convert watts to amps, milliamps, volt-amps, and BTU/hr for DC and single-phase AC circuits.
Watts to dBm Calculator
Convert watts to dBm and dBm back to watts. Includes milliwatts, dBW, and a quick reference table for RF and wireless power levels.
Energy
Energy Converter
Convert between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU.
Hardness Conversion Calculator
Convert between Rockwell HRC, Brinell HB, Vickers HV, and approximate tensile strength for steel.
Power Converter
Convert between watts, kilowatts, horsepower, BTU/hr, and other power units.
PPM Converter
Convert between parts per million (ppm), percentage, mg/L, mg/kg, and micrograms per milliliter.
Flow Rate
Force & Pressure
Force Converter
Convert between newtons, kilonewtons, pound-force, kilogram-force, dyne, and kip force units.
Inch Pounds to Foot Pounds Calculator
Convert torque between inch-pounds and foot-pounds. Also shows newton-meters for metric reference.
Pressure Converter
Convert between Pascal, bar, atm, PSI, torr, and mmHg pressure units instantly.
PSI to Bar Converter
Convert between PSI, bar, atm, kPa, and mmHg pressure units with exact conversion factors.
Torque Converter
Convert between newton-meters, foot-pounds, inch-pounds, kilogram-force meters, and other torque units.
Frequency
Length
Acres to Hectares Converter
Convert acres to hectares, square meters, square feet, and square miles with exact conversion factors.
Area Converter
Convert between square millimeters, centimeters, meters, kilometers, inches, feet, yards, acres, and hectares.
Board Feet Calculator
Calculate board feet for lumber pricing. Enter thickness, width, and length to convert to board feet, the standard unit for hardwood lumber.
Calculator Inch to Cm
Calculator inch to cm, cm to inch, and feet and inches to centimeters. Built-in reference table for 2, 3, 4, 5, 10, 12, 14, 24, 32, and 42 inches.
Centimeters to Inches Converter
Convert centimeters to inches, feet and inches, millimeters, and meters with exact conversion factors.
Feet to Inches Calculator
Convert feet to inches and back. Also shows centimeters and fractional inches to the nearest 1/16 inch.
Feet to Miles Calculator
Convert between feet and miles. Also shows yards, kilometers, and meters.
Height in Inches Calculator
Convert height from feet and inches to total inches, centimeters, and meters.
Inch to Decimal Calculator
Convert fractional inches like 3/8 or 1-5/16 into decimal inches, thousandths, and millimeters. Also goes the other way, from decimals back to the nearest fraction.
Inches to Centimeters Converter
Convert inches to centimeters, millimeters, meters, and feet with exact conversion factors.
Inches to Fraction Calculator
Convert decimal inches to fractional inches (e.g., 0.375 to 3/8). Shows nearest 1/2, 1/4, 1/8, 1/16, 1/32, and 1/64 fractions.
Kilometers to Miles Converter
Convert kilometers to miles, meters, nautical miles, and yards with exact conversion factors.
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles instantly.
Miles to Kilometers Converter
Convert miles to kilometers, meters, nautical miles, and feet with exact conversion factors.
Room Area Calculator
Calculate the area of rectangular, L-shaped, and U-shaped rooms. Enter your room dimensions to get total area in square feet and square meters plus perimeter.
Sq Meter to Meter Calculator
Convert square meters to meters for a square plot, or find the missing side of a rectangle when one side and the area are known.
Square Feet to Acres Calculator
Convert square feet to acres and hectares. See lot dimensions in acres and compare to common land sizes.
Square Feet to Square Meters Converter
Convert square feet to square meters, square yards, acres, and hectares with exact conversion factors.
Steps to Miles Calculator
Convert steps to miles, kilometers, and calories burned based on your stride length.
Yards to Meters Calculator
Convert yards to meters, feet, inches, and centimeters. Bidirectional conversion with exact factor 1 yd = 0.9144 m.
Light
Speed
Temperature
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit, Kelvin, and Rankine with exact formulas.
Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius, Kelvin, and Rankine with exact formulas.
Kelvin to Celsius Calculator
Convert Kelvin to Celsius and Fahrenheit. Includes key reference points like absolute zero, water freezing, and boiling.
Kelvin to Fahrenheit Calculator
Convert temperatures between Kelvin and Fahrenheit. Also shows Celsius and Rankine equivalents.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin with exact formulas.
Time
Date Format Converter
Convert dates between different formats and see Unix timestamps, day of year, week number, and more.
Days to Years Calculator
Convert days to years, months, and weeks. Uses the average Gregorian calendar year of 365.2425 days.
Military Time Converter
Convert between 24-hour (military) and 12-hour time formats with NATO time zone reference.
Time Unit Converter
Convert between seconds, minutes, hours, days, weeks, months, and years instantly.
Weeks to Months Calculator
Convert weeks to months, days, and years. Uses the average month length of 4.34524 weeks.
Volume
Cubic Feet Calculator
Calculate volume in cubic feet for boxes, rooms, and cylinders. Get results in cubic feet, cubic yards, cubic meters, and gallons with a quantity multiplier.
Cubic Yard Calculator
Convert length, width, and depth dimensions to cubic yards, cubic feet, and cubic meters. Includes concrete bag estimate for fill projects.
Cubic Yards to Tons Calculator
Convert cubic yards to tons for gravel, soil, sand, mulch, and other common materials using their bulk density.
Density Converter
Convert between kg/m³, g/cm³, g/mL, lb/ft³, lb/in³, and other density units.
Gallons to Liters Converter
Convert US gallons to liters, milliliters, quarts, and cups with exact conversion factors.
Gallons to Pounds Calculator
Convert gallons to pounds for water and common liquids. Select your liquid for an accurate weight based on its density.
Kg to Gallons Calculator
Convert kilograms to gallons for water and common liquids. Accounts for liquid density in the conversion.
L to Gal Calculator
Convert liters to US gallons and imperial gallons. Also shows quarts, pints, and cups.
Liters to Gallons Converter
Convert liters to US gallons, quarts, pints, cups, and fluid ounces with exact conversion factors.
Mcg to mg Calculator
Convert micrograms to milligrams, grams, and other weight units. Essential for medication and supplement dosing.
Mcg to mL Calculator
Convert micrograms to milliliters using medication concentration (mcg/mL). Essential for precise medication dosing.
mg to mL Calculator
Convert milligrams to milliliters using concentration (mg/mL). Essential for medication dosing and liquid formulations.
Quarts to Gallons Converter Calculator
Convert between quarts and gallons. Also shows liters, pints, cups, and fluid ounces.
Volume Converter
Convert between milliliters, liters, gallons, quarts, pints, cups, and fluid ounces.
Weight
Kilograms to Pounds Converter
Convert kilograms to pounds, ounces, stones, and grams with exact conversion factors.
Pounds Ounces Calculator
Convert between pounds and ounces. Enter a decimal pound value or a mixed pounds-and-ounces value.
Pounds to Kilograms Converter
Convert pounds to kilograms, grams, ounces, and stones with exact conversion factors.
Weight Converter
Convert between milligrams, grams, kilograms, ounces, pounds, stone, and metric tons.
Other
Angle Converter
Convert between degrees, radians, gradians, turns, arcminutes, and arcseconds.
Cents to Dollars Calculator
Convert cents to dollars and count coins. Enter a total in cents or individual coin counts to get the dollar amount.
Clothing Size Converter
Convert clothing sizes between US, EU, and UK sizing for men's and women's garments.
Currency Converter
Convert between major world currencies using approximate exchange rates. Includes USD, EUR, GBP, JPY, and more.
Degrees Minutes Seconds Calculator
Convert between decimal degrees and degrees-minutes-seconds (DMS) format for GPS coordinates and surveying.
Degrees to Radians Calculator
Convert angles between degrees and radians. Also shows turns, gradians, and the exact fractional pi representation.
GPS Coordinate Converter
Convert GPS coordinates between decimal degrees, degrees-minutes-seconds (DMS), and degrees-decimal minutes.
Paper Size Reference
Look up paper dimensions for A-series, B-series, US Letter, Legal, Tabloid, and other paper sizes in mm, cm, and inches.
Pennies to Dollars Calculator
Convert pennies to dollars, quarters, dimes, nickels, and coin roll counts.
Roman Numeral Converter
Convert between standard numbers (1-3999) and Roman numerals instantly.
Shoe Size Converter
Convert shoe sizes between US, EU, UK, and CM (foot length) for men, women, and children.