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THE CONVERSION COLLECTION

Conversion Calculators

Length, area, mass, volume, energy, pressure and unit conversions.

653 calculators · 11 topics

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Length Converter Calculator

Length Converter Calculator — convert units quickly and accurately.

Area Converter

Area Converter The Area Converter changes an area value from one unit to another, such as square meters to square feet or acres to hectares. It converts your value to square meters first, then to the target unit. Factors: 1 ft² = 0.0929 m², 1 acre = 4046. — convert units quickly and accurately.

Weight Converter Calculator

Weight Converter Calculator — convert units quickly and accurately.

Angstrom to Nanometer Converter

Convert Angstrom to Nanometer with a direct one-way conversion.

Find the right tool

653 calculators

Length & Distance Conversions

170 calculators

Astronomical Unit Calculator

Astronomical Unit Calculator Convert a distance in kilometres into astronomical units (AU). One astronomical unit is the average Earth–Sun distance, defined as exactly 149,597,870.7 km, so the calculator simply divides your kilometre value by that figure. — convert units quickly and accurately.

Atmospheres (atm) Pressure Converter

Atmospheres (atm) Pressure Converter Convert pressure in standard atmospheres (atm) to other common pressure units — pascals, kilopascals, bar, pounds per square inch and millimetres of mercury. One standard atmosphere equals 101,325 Pa. Enter a value in — convert units quickly and accurately.

Barometric Pressure Converter

Barometric Pressure Converter Convert a barometric (atmospheric) pressure reading between the units used in weather and aviation: hectopascals/millibars (hPa/mb), inches of mercury (inHg), millimetres of mercury (mmHg), kilopascals (kPa), and standard atm — convert units quickly and accurately.

Cubic Feet Calculator

Cubic Feet Calculator Calculate volume in cubic feet from length, width, and depth. — convert units quickly and accurately.

Cubic Meter Calculator

Cubic Meter Calculator Calculate volume in cubic metres from length, width, and height. — convert units quickly and accurately.

Feet to Inches

Convert Feet to Inches with a direct one-way conversion.

Feet to Meters

Convert Feet to Meters with a direct one-way conversion.

Feet to Miles

Convert Feet to Miles with a direct one-way conversion.

Gallon Converter

Gallon Converter Convert US gallons to litres, cubic feet, and cubic inches. — convert units quickly and accurately.

Height Unit Converter

Height Unit Converter Convert between cm, feet, and inches. 1 inch = 2.54 cm; 1 foot = 12 inches. — convert units quickly and accurately.

Imperial Unit Converter

Imperial Unit Converter Convert common imperial length measurements between each other. — convert units quickly and accurately.

Kilometers Converter

Kilometers Converter Convert kilometres to miles, metres, and feet. — convert units quickly and accurately.

Linear Inches (Luggage) Calculator

Linear Inches (Luggage) Calculator The Linear Inches Calculator adds a bag's length, width, and height to get its total linear inches, and checks it against the common 62-inch airline limit. Enter the three dimensions. — convert units quickly and accurately.

Map Scale Conversion Calculator

Map Scale Conversion Calculator Convert distances between map scale and real-world measurements. Calculate actual distances from map measurements. — convert units quickly and accurately.

Meters to Feet

Convert Meters to Feet with a direct one-way conversion.

Metric to Inches

Metric to Inches: calculate inches using defined numerical inputs.

Millimeters Converter

Millimeters Converter Convert millimetres to centimetres, metres, and inches. — convert units quickly and accurately.

PSI Converter

PSI Converter Convert PSI (pounds per square inch) to other pressure units. Supports kPa (kilopascals), bar, atm (atmospheres), and MPa. — convert units quickly and accurately.

Unusual Unit Converter

Unusual Unit Converter Convert everyday quantities to amusing reference units. — convert units quickly and accurately.

Area Conversions

21 calculators

Area Converter

Area Converter The Area Converter changes an area value from one unit to another, such as square meters to square feet or acres to hectares. It converts your value to square meters first, then to the target unit. Factors: 1 ft² = 0.0929 m², 1 acre = 4046. — convert units quickly and accurately.

Land Area Converter (Marla / Kanal)

Land Area Converter (Marla / Kanal) Popular Land Area Converter (Marla / Kanal) is a unit converter that helps you calculate the area of a geometric shape from its dimensions. The formula used is: Result = Value × (sq ft per 'from' unit) ÷ (sq ft per 'to' — convert units quickly and accurately.

Square Feet Converter

Square Feet Converter Convert square feet to square meters, acres, or other area units. — convert units quickly and accurately.

Square Meter Converter

Square Meter Converter Convert square meters (m²) to square feet, acres, hectares, or other area units. — convert units quickly and accurately.

Square Yards Converter

Square Yards Converter Convert square yards (yd²) to square feet, square meters, or other area units. — convert units quickly and accurately.

Volume Conversions

55 calculators

Mass & Weight Conversions

45 calculators

Force Unit Converter

Force Unit Converter Convert between common force units: newtons (N, SI), pounds-force (lbf), kilograms-force (kgf), and dynes. Useful for physics, engineering, and international unit conversions. — convert units quickly and accurately.

Pounds Converter

Pounds Converter Convert pounds to kilograms, ounces, and stones. — convert units quickly and accurately.

Time Conversions

52 calculators

Hours to Weeks

Convert Hours to Weeks with a direct one-way conversion.

Hours to Years

Convert Hours to Years with a direct one-way conversion.

Time Zone Converter

Time Zone Converter Convert time between UTC offsets and different time zones. — convert units quickly and accurately.

Pressure Conversions

47 calculators

Electrical Conversions

58 calculators

Capacitance Conversion Calculator

Capacitance Conversion Calculator Convert capacitance between farads, millifarads, microfarads, nanofarads, and picofarads. Capacitor values span a huge range, so this converter — free online calculator.

Energy & Power Conversions

19 calculators

Power Unit Converter

Power Unit Converter Convert power units: watts, kilowatts, horsepower, BTU/h. — convert units quickly and accurately.

Number & Scale Conversions

16 calculators

Mayan Numeral Converter

Mayan Numeral Converter Convert decimal numbers to Mayan numerals (base-20 vigesimal system). Educational tool for ancient Mayan mathematics. — convert units quickly and accurately.

General & Specialized Conversions

148 calculators

Byte Converter Calculator

Byte Converter Calculator Convert digital storage between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Enter an amount and pick the units to convert from and to, using binary (1 KB = 1024 bytes) factors. — convert units quickly and accurately.

CGS ↔ SI Converter

CGS ↔ SI Converter Convert common quantities between CGS and SI unit systems. — convert units quickly and accurately.

Cholesterol Units Converter

Cholesterol Units Converter Convert cholesterol levels between mg/dL and mmol/L. — convert units quickly and accurately.

Cubic Meters to Tonnes

Cubic Meters to Tonnes Convert cubic metres to metric tonnes based on material density. — convert units quickly and accurately.

Cubic Yards to Tons

Cubic Yards to Tons Convert cubic yards to short tons based on material. — convert units quickly and accurately.

Dimensional Analysis Helper

Dimensional Analysis Helper Multiply a value by a chain of up to 4 conversion factors to reach the target unit. — convert units quickly and accurately.

Dimes to Dollars

Dimes to Dollars Convert a number of dimes to US dollars. — convert units quickly and accurately.

English Gematria Calculator

English Gematria Calculator Calculate the gematria (numerological) value of a word or phrase using simple English gematria (A=1, B=2...Z=26). — convert units quickly and accurately.

Foot Pounds to Newton Meters Converter

Foot Pounds to Newton Meters Converter Convert foot-pounds (ft-lb) to newton-meters (Nm), the SI unit of torque and energy. Useful for international specifications, automotive work, and mechanical engineering. Formula: Nm = ft-lb × 1.355817948. — convert units quickly and accurately.

Foot-pounds to Inch-pounds Converter

Foot-pounds to Inch-pounds Converter Convert foot-pounds (ft-lb) to inch-pounds (in-lb) instantly. Torque conversions for mechanical engineering, automotive, and fastener specifications. Formula: in-lb = ft-lb × 12 (since 1 foot = 12 inches). — convert units quickly and accurately.

Gaj To Square Yard Converter Calculator

Gaj To Square Yard Converter Calculator Convert gaj (South Asian land measurement, 1 gaj ≈ 1 square yard ≈ 9 square feet) to square yards. Used in Pakistan, India, and Bangladesh real estate. — convert units quickly and accurately.

Gallons to Tons (Water)

Gallons to Tons (Water) Convert US gallons to short tons (for water). — convert units quickly and accurately.

Greek Isopsephy Calculator

Greek Isopsephy Calculator Calculate the Greek isopsephy (numerological) value of a Greek text. — convert units quickly and accurately.

Hex to RGB Color

Hex to RGB Color Convert a CSS hex color code to RGB values. — convert units quickly and accurately.

Inch-pounds to Foot-pounds Converter

Inch-pounds to Foot-pounds Converter This Inch-pounds to Foot-pounds Converter lets you convert Inch-pounds (in-lb) into Foot-pounds (ft-lb) in one step. Enter a value in inch-pounds and you'll instantly see the equivalent in foot-pounds, worked out with — convert units quickly and accurately.

Inch-Pounds to Newton-Meters

Inch-Pounds to Newton-Meters Convert torque from inch-pounds to Newton-metres. — convert units quickly and accurately.

Inch-pounds to Newton-meters Converter

Inch-pounds to Newton-meters Converter This Inch-pounds to Newton-meters Converter lets you convert Inch-pounds (in-lb) into Newton-meters (Nm) in one step. Enter a value in inch-pounds and you'll instantly see the equivalent in newton-meters, worked out — convert units quickly and accurately.

Kilogram-force Meters to Newton-meters Converter

Kilogram-force Meters to Newton-meters Converter This Kilogram-force Meters to Newton-meters Converter lets you convert Kilogram-force meters (kgf-m) into Newton-meters (Nm) in one step. Enter a value in kilogram-force meters and you'll instantly see the — convert units quickly and accurately.

Leet Speak Converter

Leet Speak Converter Convert plain text to leet speak (1337) substitutions. — convert units quickly and accurately.

Newton Meters to Foot Pounds Converter

Newton Meters to Foot Pounds Converter This Newton Meters to Foot Pounds Converter lets you convert Newton-meters (Nm) into Foot-pounds (ft-lb) in one step. Enter a value in newton-meters and you'll instantly see the equivalent in foot-pounds, worked out — convert units quickly and accurately.

Newton-Meters to Foot-Pounds

Newton-Meters to Foot-Pounds Convert torque from Newton-metres to foot-pounds. — convert units quickly and accurately.

Newton-Meters to Inch-Pounds

Newton-Meters to Inch-Pounds Convert torque from Newton-metres to inch-pounds. — convert units quickly and accurately.

Newton-meters to Inch-pounds Converter

Newton-meters to Inch-pounds Converter This Newton-meters to Inch-pounds Converter lets you convert Newton-meters (Nm) into Inch-pounds (in-lb) in one step. Enter a value in newton-meters and you'll instantly see the equivalent in inch-pounds, worked out — convert units quickly and accurately.

Newton-meters to Kilogram-force Meters Converter

Newton-meters to Kilogram-force Meters Converter This Newton-meters to Kilogram-force Meters Converter lets you convert Newton-meters (Nm) into Kilogram-force meters (kgf-m) in one step. Enter a value in newton-meters and you'll instantly see the equivale — convert units quickly and accurately.

Nickels to Dollars

Nickels to Dollars Convert a number of nickels to US dollars. — convert units quickly and accurately.

Paper Ream Calculator

Paper Ream Calculator Calculate how many reams and individual sheets of paper you need. — convert units quickly and accurately.

Paper Thickness from Weight

Paper Thickness from Weight Estimate paper thickness from weight/gsm. Formula: Thickness (mm) ≈ Weight (gsm) × 0.1. Approximate relationship. — convert units quickly and accurately.

Pennies to Dollars

Pennies to Dollars Convert a number of pennies to US dollars. — convert units quickly and accurately.

Percent To Basis Points Converter

Percent To Basis Points Converter This Percent To Basis Points Converter lets you convert Percent (%) into Basis points (bps) in one step. Enter a value in percent and you'll instantly see the equivalent in basis points, worked out with the formula bps = — convert units quickly and accurately.

Percent To Ppm Converter

Percent To Ppm Converter This Percent To Ppm Converter lets you convert Percent (%) into Parts per million (ppm) in one step. Enter a value in percent and you'll instantly see the equivalent in parts per million, worked out with the formula ppm = % x 1000 — convert units quickly and accurately.

Percent To Ratio Converter

Percent To Ratio Converter This Percent To Ratio Converter lets you convert Percent (%) into Ratio (ratio) in one step. Enter a value in percent and you'll instantly see the equivalent in ratio, worked out with the formula ratio = % / 100. It's handy when — convert units quickly and accurately.

Permille To Percent Converter

Permille To Percent Converter This Permille To Percent Converter lets you convert Per mille (‰) into Percent (%) in one step. Enter a value in per mille and you'll instantly see the equivalent in percent, worked out with the formula % = ‰ / 10. It's h — convert units quickly and accurately.

Pixels to EM

Pixels to EM Convert pixels to em units (CSS) based on base font size. — convert units quickly and accurately.

PPM Converter

Use this free PPM Converter to calculate the result quickly and accurately.

Ppm To Percent Converter

Ppm To Percent Converter This Ppm To Percent Converter lets you convert Parts per million (ppm) into Percent (%) in one step. Enter a value in parts per million and you'll instantly see the equivalent in percent, worked out with the formula % = ppm / 1000 — convert units quickly and accurately.

Ratio To Percent Converter

Ratio To Percent Converter This Ratio To Percent Converter lets you convert Ratio (ratio) into Percent (%) in one step. Enter a value in ratio and you'll instantly see the equivalent in percent, worked out with the formula % = ratio x 100. It's handy when — convert units quickly and accurately.

RGB to Hex Color

RGB to Hex Color Convert RGB color values to a CSS hex code. — convert units quickly and accurately.

Text to Bold Unicode

Text to Bold Unicode Convert text to Unicode bold characters. — convert units quickly and accurately.

Text to Cursive (Unicode)

Text to Cursive (Unicode) Convert text to Unicode cursive/script-style characters for use in social media bios. — convert units quickly and accurately.

Unicode Code Point Inspector

Unicode Code Point Inspector Show the Unicode code points for each character in a text string. — convert units quickly and accurately.

More Conversion Calculators

22 calculators

Metric to SAE Socket Size

Metric to SAE Wrench Approximation Calculator: a transparent calculation with explicit input units and scope.

PPM to mg/L Converter

PPM to mg/L Converter: calculate concentration (mg/l) using defined numerical inputs.

Radiation Dose Converter

Radiation Unit Converter — Gy to rad and Sv to rem — limited numerical model with explicit assumptions.