Conversion · General Conversion
Formula verified
Unit Converter
Pick a category, choose your units, and enter a value to convert instantly — the same value updates live as you type or switch units.
Category
On-screen number pad
Tap to type into the highlighted field
Converted value
3.28084
1 m = 3.28084 foot
Step-by-step proofCheck by hand
Ad slot · 970×250 billboard
Ad slot · 300×250
How the conversion works
Length, weight and volume all convert through a shared base unit — meters, kilograms, and liters respectively. Multiply your value by the "from" unit's factor to reach the base unit, then divide by the "to" unit's factor to land on the target unit. Temperature can't use this shortcut, since Celsius, Fahrenheit and Kelvin don't share a zero point — it converts through dedicated formulas instead.
The formula
result = value × factor(from) ÷ factor(to)
Worked example
1 meter to feet: 1 × 1 ÷ 0.3048 ≈ 3.28084 feet.
Frequently asked questions
Why does temperature need different math from the other categories?
Length, weight and volume all convert by simple multiplication, because doubling a length in meters doubles it in miles too — there's a shared zero point at "nothing." Temperature scales don't share a zero point: 0°C is not the same physical temperature as 0°F or 0 Kelvin, so converting between them needs an offset (subtracting or adding a fixed amount) in addition to scaling, not multiplication alone.
How are the conversion factors chosen?
Each unit's factor is how many of the category's base unit (meters for length, kilograms for weight, liters for volume) equal exactly one of that unit — these are internationally defined exact figures (an inch is exactly 0.0254 meters, a pound is exactly 0.45359237 kilograms), not rounded approximations, so converting through the base unit and back introduces no error.
Why can't temperature go below a certain value?
Absolute zero (−273.15°C, −459.67°F, 0 Kelvin) is the coldest temperature physically possible — nothing can be colder, because temperature measures the energy of moving particles, and there's no such thing as negative motion energy. Entering a value that would convert to something colder than absolute zero isn't a valid temperature.
Sources and method
- Length, weight and volume conversion factors — internationally defined exact SI/imperial equivalences (NIST Handbook 44).
- Temperature conversion formulas and absolute zero — general published physics.