Mass reference
Use kilograms as the canonical basis for mg, g, t, oz, and lb. For a quick check, 1 kg is about 2.20462 lb; the physical mass does not change with the unit.
056 · UNIT & CALCULATOR
Weight, Temperature & Pressure Converter
Convert mass, temperature, and pressure units with controllable decimal precision.
LOCALCALCULATE IN YOUR BROWSER
LOCALValues and conversion results are calculated only in this browser and are not sent to or stored on a server.
Quick units
Display settings · Decimal places
4
RESULT · Conversion result
2.2046lb
1 kg → lb
Common units
1,000,000Milligram · mg
1,000Gram · g
1Kilogram · kg
0.001Metric tonne · t
35.274Ounce · oz
2.2046Pound · lb
NIST conversion references · rounding is display-only
HOW TO USE
How to use
- 01
Choose Mass, Temperature, or Pressure.
- 02
Enter a number and choose the From and To units.
- 03
Use quick-unit buttons for common kg/lb, °C/°F/K, and kPa/bar/psi/atm conversions.
- 04
Set decimal places from 0 to 8 in Display settings.
- 05
Review the result and copy it when needed.
CONVERSION GUIDE
Temperature conversion is different from mass and pressure
Mass and pressure use canonical factors, while temperature requires scale-and-offset formulas between °C, °F, and K.Temperature formulas
Celsius and Fahrenheit are not related by scale alone: °F=°C×1.8+32. Kelvin uses K=°C+273.15.
Pressure reference
Use pascals as the canonical basis for kPa, MPa, bar, atm, psi, and mmHg. This changes the unit used to express the same pressure.
Common reference values
1 bar=100 kPa, 1 MPa=1000 kPa, and 0°C=32°F=273.15 K. These are useful sanity checks.
Absolute zero
Kelvin cannot be below 0 K, equivalent to -273.15°C, so lower temperature inputs are rejected.
Gauge vs absolute pressure
This tool converts units only; it does not convert gauge pressure into absolute pressure. Check the pressure type before engineering or equipment calculations.
IMPORTANT NOTES
Important notes
- Mass and pressure use linear conversion factors; temperature uses affine formulas with offsets.
- Negative temperatures are allowed, but values below absolute zero (0 K) are rejected.
- Pressure conversion does not distinguish or correct gauge pressure versus absolute pressure.
- Rounding is applied only for display; internal calculation values are preserved.
- For legal metrology, official submissions, or professional thermodynamic work, follow the relevant official standard.
FAQ
Frequently asked questions
01Does it accurately convert kg and lb?+
Yes. It uses established conversion factors while decimal display precision is controlled separately.
02Why is °C to °F not simple multiplication?+
Fahrenheit includes a 32-degree offset, so °F = °C × 1.8 + 32.
03Does it support Kelvin?+
Yes. °C, °F, and K convert both ways, and values below 0 K are rejected.
04Can it convert psi, bar, and kPa?+
Yes. It supports Pa, kPa, MPa, bar, atm, psi, and mmHg.
05Does decimal precision change the calculation?+
No. It changes display precision only, from 0 to 8 decimal places.